Alternator pulley problems

 

that there's a problem with the overrunning alternator pulley or the  Lights that are dim across the dashboard are also indications of a problem. I did some of the tests for the Decoupler Pulley, and it looks like its bad. However there are alot of things that can go wrong with an alternator, especially at high miileage. For anyone with alternator problems search the web for armature repair shops in your local. An excessively worn or loose alternator belt can produce foreign sounds, as can an alternator belt that is out of alignment. Loosely attach the alternator adjustment bracket to the alternator adjustment ear with the bolt, lockwasher and flat washer. If your alternator has a solid pulley, only replace if damaged, rusted, or worn. Common Alternator Problems. In Bill's first post he noted "Apparently, INA, who patented the design and is the Volvo supplier, recommends that these things be changed out with every serpentine belt change. Visibly worn pulleys. 00 dollars for someone elses old-rebuilt alternator. Made of Nickel-Plated and Oxide Coated CR-V. The first I put in 2007, the second April 2010 and now the third June 2010. Some would be back a a few weeks later complaining that the new pulley also broke and that we sold them a defective part. If the pulley is not in correct alignment with the belt, or if the bearings are won out, the alternator will make a growling noise. This Alternator Bracket Kit allows a compact clean installation with the alternator mounted where you want it. The engine speed may not read right if the pulley is not the right size. And hoping my geometry is correct enough to not roll/toss belts Wanted to post, although an old thread, to save someone the problems involved with this underdrive pulley BS non authentic . I'll give you a little background so you can understand what both systems do. One day whilst buying yet another belt, he asked a Renault mechanic about it and he remembered something about it on an internal memo - it turns out there was a modified alternator pulley that solves the problem. When it starts to fail, it can create a domino effect of electrical problems that can ultimately cause a breakdown. Further more, when I switched gears the car shudders and if I drive it, even a foot, it turns off. Hi guys ! I have a problem with my alternator pulley not sitting flush with the bottom pulley on my 911 1974 2,7. Our vast selection is ready to be sent out today; place your order now! I am referring to the alternator pulley not the serp. And if later engines did have a smaller pulley, why isn't it listed in any parts suppliers I've checked? Sounds like I have a very rare alternator pulley then. Choose top quality brands Dayco, Gates, INA, Replacement. 9TDI (PD) Alternator Clutch Pulley Replacement Application: Porsche® 928 1978 through 1995 all Background: The first Porsche® 928s were introduced with 90 amp alternators. Make sure you mark the path with a chalk so you won't get lost when you reassemble it. It provides the high amount of voltage needed to turn the I did get a new alternator, and the new pulley was wrong, so I swapped the old pulley onto the new alternator and it still works fine. So if you don't want to spend more money, you must take proper care of your Toyota Alternator Pulleys. Click on Picture or Part No. Bit baffling this. Is this rating for the pulley rpm on the alternator - or is it the rpm of the engine? Also, if the pulley is spinning slower t Timing degrees & TDC permanently bonded to pulley face with all new epoxy in Black, Candy Blue or Candy Red; All Sand Seal Pulleys feature a steel sleeved pulley hub which prevents cracking of the aluminum pulley keyway and insures against oil leaks due to wear of seal rubbing against aluminum hub The Facts about Performance Pulley’s We’ve all seen the ads that promise “8 – 15 Horse Power” by just replacing your stock pulleys with a new set of aluminum performance under drive pulleys. THIS IS A CRITICAL COMPONENT OF THE SERPENTINE BELT SYSTEM AND A KNOWN CAUSE OF BREAKAGE PROBLEMS IT IS COMMON FOR THIS DECLUTCHING PULLEY TO FAIL, LONG BEFORE THE ALTERNATOR WEARS OUT. • Both ‘V’ and Multi-grove types are used. Very cool shop small but this is what they do. <<< Installed in my car for long-term road testing. This superior electrical part by URO is a great alternative solution to the costly factory equipment that will help you restore smooth and efficient operation of your vehicle. 8" pulley for an MGA street car, and even then you may have only 2:1 drive ratio. The price of a new alternator can run from $500 to $1,000. I have a 1973 Fury with a 400. The most common pulleys on GM, Ford and Daimlier/Chrysler vehicles are the 6-groove 2-7/16, 2-3/8 and 2-1/4 inch pulleys, by reducing the pulley size to 2" or 1-7/8" your alternator will start producing power sooner and If you hear a squeaking, squealing, or an irritating noise coming from your vehicle as it runs, it could be from your alternator pulley. Among the various common charging system problems you might encounter, one is a noisy alternator. 3L Chrysler mini-van has a pulley with a clutch in it. This will be my third rebuilt alternator that I'll have to put in. Whether you need a conventional solid pulley. SAC looks at all types of alternators, how it works, and its common problems for alternator troubleshooting. I just bought a new alternator in april of this yr. If you suspect alternator trouble, you need to check to see that is operating correctly, and is indeed the cause of the problems with your charging system. Over time, as the pulley spins against the belt, both components will eventually start to wear. If you are having problems with overall alternator output or charging at engine idle, maybe a smaller pulley is all  Feb 13, 2018 An alternator pulley is not so simple anymore. The alternator pulley spins on a shaft, which in turn is supported by either bearings or bushings. The other has a ‘spacer’ of about 1/2” from back of pulley to cooling fan. The pulley should spin easily with no wobble or runout. Save on Alternator Pulleys with great deals at Advance Auto Parts. However, an Overrunning Alternator Pulley (OAP) on the other hand, is just a one-way clutch that allows the alternator’s rotor to free-wheel during deceleration. If the car dies then the alternator is the problem. Pulley ratio is the comparison of the crankshaft pulley diameter to the alternator pulley diameter. The 130 Amp alternator will increase the charging capacity at all RPM Ranges with no modifications required. If you suspect this problem, it's only a matter of time before the alternator gives up. Alternator Pulley - posted in Ford Galaxy Technical Section MK I MK II: Hi, I have recently had problems with the vibrations spoken about from the alternator pulley, i was wondering if anyone on here knows how to take the tension off the aux belt so the pulley can be removed, the process description/pictures or any info would be great, thanks Alternator Pulley (Decoupling) 3. Its not easy finding out exactly which part of your car is giving you the trouble, but here are a few tips by which you can find out whether you have car battery problems or alternator problems. com ✓ FREE I found out it was the alternator pulley gone bad, it's a common problem on these cars. I had battery checked and it needed to be replaced, battery was original. it also has a "notch" for the key. If the pulley absorbs shock as well as decouples the alternator, then the parts mean the same thing. " Although both of these technologies allow the alternator to free-wheel when necessary, only an OAD Decoupler Pulley also includes the internal spring mechanism required to absorb vibration caused by reduced belt tension. 1. I could mess about with different sizes of washer until it was exactly in line. If you are experiencing problems with an engine or transmission you purchased from Advance Auto If an alternator with an OAP or OAD pulley is being replaced, and the replacement unit does not have a pulley installed, or it is a simple pulley and not the same type of OAP or OAD pulley, the original pulley can be removed from the old alternator and installed on the new unit – provided it is in good condition. I have power steering, but I believe that it runs off a the same pulley as the water pump or alone. A measurement was made at the crank end first, from the straight edge to the pulleys second groove and then repeated at the alternator pulley end and the two offsets were compared. Did they fit a smaller alternator pulley for the last few months?" However, that fan belt won't fit my Sprite, even though that's the one with the small alternator pulley. Nothing wrong with it. Helpful. Pull full review An overrunning alternator pulley (OAP) can play an important part in the smooth running of the modern internal combustion (IC) engine. Definitely use the 2. He mentioned that thermo-king had a larger pulley and a smaller pulley to slow the speed down to keep it cooler. Looks like your pulley had loosened over time due to regular use. Waits says the average price to replace an alternator with a remanufactured one is $400, while Gunning adds that a remanufactured alternator on a typical, domestic car, costs about $300 to $500, including parts and labor. Fortunately, the belt can help you diagnose the problem, both before you remove it and afterward: Diagnosing alternator problems can be a bit tricky because the electrical system in a car comes from two places, the battery and the alternator. Replacing an alternator with a new OEM part is expensive, but there are alternatives. It has 30 pieces. The alternator is a key component in your car's electrical system, turning the When it starts to fail, it can create a domino effect of electrical problems that can  We stock a wide variety of alternator clutch pulleys at Burghfield Starter & Alternator The problem is that they frequently fail, by either freewheeling both ways, . Your car might die, but you may be able to restart it with a jump start. Many late-model vehicles are equipped with special pulleys that are engineered to reduce NVH  A squealing alternator pulley is not only annoying, it indicates a problem with the car's belts or alternator. This condition will cause a loss of engine efficiency/fuel economy, shortened belt and bearing life, extreme NVH, and other problems. BMW ALTERNATOR Problems and Faults . I bought a new one and the alternator lights came on as soon I started the engine and do not charge the vehicleBut If I put the alternator on the test table it"ll charge but not when is installed. Testing with this configuration showed that the alternator pulley now actually has slightly MORE GRIP than the crank pulley. The other critical tool to effectively diagnose an alternator is a scan tool. The alternator on your 3. When turning clockwise it should engage and spin the alternator armature. Never substitute a solid alternator pulley or a simple Overrunning Alternator Pulley in place of an IDP. The whole pulley and belt made this wild horrific screeching sound and now my check battery light is on. It also helps protect other components such as the alternator and water pump from undue stress and premature failure. This spinning is made possible by the belt that runs from the pulley on the alternator to the crankshaft. Anyone no what I need to replace? I assume it's not the pulley bearing since it's fixed on the alt shaft. Alternator Pulley Size How it Affects the Charging An OAD Decoupler Pulley is different from an Overrunning Alternator Pulley, or "one-way clutch. The biggest problem is a loud whine when I accelerate. A common question is “what is the difference between a one way clutch pulley and an overrunning alternator decoupler pulley?” The primary difference has to do with ONE major component. Order Alternator for your 2005 Ford F-250 Super Duty and pick it up in store—make your purchase, find a store near you, and get directions. And when your Toyota Alternator Pulley has some problems, you must fix or replace it as soon as possible. The field windings of the rotor receive power through brushes that ride against slip rings. I just got a new alternator for my jeep that says 160amps at 2k rpm. . Now, I was wondering where I can buy a deep groove alternator pulley that will allow the belt to sit deep into the pulley thus not allowing the belt to fly off at a higher rpm? Thanks in advance! With the correct socket, loosen up the alternator adjustment to be able to remove the alternator belt. Used to be the industry standard and has been around for many years. It's obvious the stock alternator can not produce enough power to keep the voltage in the 14v range. I own a 2005 Nissan Altima which has been having alternator/battery problems for past 1 year. First, let’s describe a situation where an alternator is being underdriven. CVF designs, manufacturers and sells premium Serpentine & V-Belt Kits along with Billet Aluminum Pulleys and Brackets for Ford, Chevy, Pontiac, Chrysler (Mopar), Cummins, Oldsmobile, AMC Jeep, Buick and more. 25" diameter. Just went through the same thing with mine,apparently some of these old conversion kits had a larger(3 1/2 inch)pulley. I believe that those areonly for AC cars. If you take the fan belt off and spin the pulley quickly back and forth by hand, this may indicate if there are any problems. a rebuild was 189$ from napa. Your car probably has a serpentine belt which is a continuous belt used to drive multiple peripheral devices. Tightening the pulley in-situ was a pain, but once it's done it can be forgotten. a clutch pulley or a decoupler pulley. This required a pulley with a 10mm wide "V". Alternator output is another reason for overcharging. Both flickering and dimming are strong indications that your alternator is no longer  Overrunning alternator pulleys fail by either locking up and failing to over run properly, or by failing to lock up in the drive direction. Alternator pulley isnt your problem, thats for sure. This causes inefficiency in the pulley on the belt drive, which causes the alternator to rotate more. The vehicle manufacturer has designed the vehicle with this higher level of function for a reason! Substituting a different alternator pulley may cause damage to V70 free wheel alternator pulley spin off repair advice Post by littph123 » 10 Nov 2010, 01:55 While driving on the freeway for about 45 miles, I heard a quick screeching and a clunk, and then the computer said there was an electrical system loss. Almost all of us have experienced the problem where either your car battery or alternator just conks out, and you can't make out which one to replace. Without the alternator, your power supply would diminish until the vehicle died. If the bushings that the alternator is mounted on have gone bad, a noise will be produced. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35. Remove serpentine belt Carefully stick a screw driver into the cooling fan to hold the internals still Rotate the pulley - it should freewheel in one direction and lock up in the other _____ Since the underdrive pulley turns less -- in some cases, 30 percent less -- the wear and tear on bushings and sealed bearings is reduced, extending the life of the bearings, shafts, seats and races. • While many manufacturers do use a external fan for cooling. Alternator V-belt pulleys are available in 2. The PA Performance Alternator produces 80+ amps at idle (2000 alternator shaft RPM), and 160+ amps at maximum (6000 alternator shaft RPM). The 2007 Dodge Caliber has 1 problems reported for alternator pulley noise. Almost every late-model car or truck is equipped with an overrunning alternator pulley (OAP) or an overrunning alternator decoupler (OAD). I've noted no issues thus far with  Buy Gates 37018P Alternator Pulley: Pulleys - Amazon. Here are some common causes of alternator noise. no problems with shipping or product Billy. Alternators are normally replaced as an assembly. Its only purpose is to drive the alternator via the belt. Farmall Alternator found in: Mini 35 Amp 12-V Negative Ground Alternator with Pulley, Alternator Pulley for ABC3551 Alternator, Alternator Pulley Only, 63 Amp One Wire Alternator with Pulley -- Used for converting 6 Volt to 12. Was a campaign on the Vettes for a while, now that is the only way you can get a factory pulley or alternator for the Vette. 13Pcs Alternator Freewheel Pulley Removal Socket Set Engine Pulley Repair Kit Features: Use laser cutting, electric discharge, wire cutting and further processing the parts by CNC machine tool, in order to guarantee the accuracy. But it often gets overlooked by design engineers despite the positive effects it can have on energy efficiency. such as the alternator, This can upset the rotation of the belt and lead to all sorts of problems. Because the alternator is connected to (and critical for) other vehicle systems, any mechanical auto problems can have an effect on its function and have an effect on diagnosing car problems. It has evolved from the V type to the V-ribbed type (serpentine belt). INA is an OE supplier for valvetrain, camshaft phasing, belt drive bearings, tensioners/dampers and idler assemblies and is a common component in quality drive belt and camshaft timing kits. If you are having problems with your vehicle not charging the battery, the problem could be a defective alternator pulley. when you buy one. The belt that would be driving the alternator in its new location will be a 17 series belt, which requires a 13mm (1/2 inch) wide pulley "V". This article will teach you how to troubleshoot your alternator pulley to eliminate the noise. 040 thick. It accepts the standard 1932-38 flatheads with the single 5/8” belt width and allows you to bolt on an original style 1932-38 Ford fan. A mismatched pulley ratio and alternator will spell trouble, especially at idle speeds where alternator performance is critical. I have tried fitting a new outer part of the upper pulley, changing the belt with a new one, changing the shim setup (6 in in total). Now we have to replace the alternator and are being told by the mechanic that there is no connection between replacing the battery two weeks ago and the alternator failing now. With the belt removed, spin the alternator. The Nu-Rex MaxR alternator pulley (included with any Nu-Rex alternator) and the replacement type Nu-Rex Hi-Speed pulleys have a special charcteristic that makes an improper fitting fan belt or a worn out fan belt very obvious and easy to detect. What is an alternator, and what is its purpose. Warning Lights: The warning light signaling alternator problems is often shaped like a battery or appears as "ALT" or "GEN". If the alternator is running correctly and strong it will generate enough juice to keep the engine running (and therefore the battery is the problem). I'm pretty sure it's the one on the alternator. My car has 112,000 miles on it. Also please check out the statistics and reliability analysis of Honda CR-V based on all problems reported for the CR-V. By Rick Popely. Frequently Asked Questions. Using my Amazon links With the engine off, pop the hood open and visually inspect the different components of the charging system. An alternator's output is dependent on speed, but this can be deceiving because this output is not linear. 5 volts or higher, there is a charging problem that most likely is due to a bad alternator. The technical details are The INA Overrunning Alternator Pulley (OAP) is an auxiliary drive solution that, in contrast to a solid pulley, allows rotational motion in order to dampen vibrations. Buy a 2008 Nissan Rogue Alternator Pulley at discount prices. We had no elecrical problems with the car but were told during a routine maintainence that the battery tested poorly. Other possible causes of pulley noise can be ruled out by removing the belt and rotating each pulley by hand. well monday the alternator died. The alternator pulley typically spins about two times faster than the crankshaft pulley to produce the necessary power for the vehicle at lower engine speeds, especially while idling. An old timer told me this trick test to see which is bad, the battery vs alternator: With the car running, pull the positive battery lead. One is a normal pulley width with cooling fan flush up against the back of the pulley. What are OAPs and OADs? And How Do They Fail? November 22, 2013 at 9:41am. A friend offered me a Ford 3G alternator (some friend eh? ) which I installed in the car after I machined a pulley for it. Alternator / Generator Choose for Me to Minimize Cost Choose for Me to Minimize Cost Related Parts Alignment Tool Alternator / Generator Bolt Alternator / Generator Boot Alternator / Generator Connector Alternator / Generator Pulley Battery Charger Belt Belt Installation Tool Belt Measurement Tool Belt Tension Gauge Electrical Repair Manual The alternator pulley has a bearing inside and that bearing is somehow stuck up. 4L Ford F150 F250 F350 04-08 Mark LT 06-08 4L3U-10300-BB 4L3Z-10346-BA 4L3Z-10346-BB 6L3Z-10346-AA 7L3T-10300-AA 7L3Z-10346-A A faulty or failing alternator can cause many problems; from a simple discharging of the battery to an engine drivability problem. A tensioner maintains the correct amount of tension on the belt at all times throughout its duty cycle. ALTERNATOR PROBLEMS OR BATTERY PROBLEMS? Look for the following car symptoms to check for alternator problems and battery problems. SUBJECT: ALTERNATOR PULLEY AND TENSIONER REPLACEMENT. Sounds like a pulley squeak. Look for a worn out or loose drive belt, alternator connection problems, loose alternator mounting bolts, and corrosion and dirt around the battery case and cables. Pulley Problems If an overrunning alternator pulley (either OAP or OAD) is worn out, it may produce a buzzing noise when the engine is decelerating or is shut off. We do not process orders on the weekend, High output alternator and high Performance Alternator orders ship from Michigan. Mustang engine brackets & pulleys come in a wide variety of sizes so, while the factory pulley might've been one size, if you put on a slightly larger or smaller size, you're going to be changing the RPMs of that particular pulley, which will affect the amount of power getting to the accessory. A mismatched pulley ratio and alternator can lead to big problems,  Sep 6, 2018 It runs along the crankshaft pulley, power steering pulley, alternator starts getting bad, you can replace it before it becomes a critical problem. 5" diameter and the belt only sits like half way in the pulley. A charging system test will help you determine if your alternator The alternator is a key component in your car's electrical system, turning the energy from the crankshaft into useful electricity to power your vehicle's electrical systems and to help the battery recharge. Idler Pulley for Drive Belt Model: BMW E36 – BMW 328iA with M52 Engine Complaint: Due to the drive belt idler pulley not being installed correctly during production it may cause under certain conditions a belt noise and premature wear on the main pulley belt which guides the water pump, generator and power you get 4 alternator/generator pulley shims and 4 crank pulley shims in the kit. Some manufacturers refer to an OAD as an Alternator Decoupler Pulley (ADP). That one way (or sprag clutch) on the pulley was first introduced on the C5 Corvettes to get rid of a harmonic vibration that could be felt at about 1500-2000 rpm. I thought the alternator was going bad because of some battery problems. I continue to have problems with engine belts wearing out, slipping and shedding black particles all over the engine. A belt is used to drive the alternator off the engine crankshaft. Eventually we began taping the installation instructions to the box and including 10 shims with the pulley and we had fewer problems with people claiming we sold them a piece of junk. There is no replacement pulley so the whole alternator had to be replaced If a magnetic field is present, the voltage regulator, alternator brushes and rotor are likely to be working prop-erly. The one I got This pulley was added when I put the turbo setup on. To show the importance of using the right pulley design, we installed an alternator equipped with a solid pulley. All units and parts are not always in stock at all locations so if your in a hurry call 616-606-5045 to check stock first. Alternator Pulley by URO Parts®. Left unattended, the problem that causes a pulley  Dodge Spirit Belt Nosie Due to Alternator Pulley Misalignment - 8 reports. As you continue to drive your vehicle, the alternator belt gets a little bit more worn each day. Why is a new OEM alternator in a 2003 Nissan Murano not charging the battery? While aftermarket alternators are known to cause problems, it is very rare for this to happen with an OEM unit installed by a dealer. Jan 26, 2019 A belt tensioner is like a pulley that is mounted on an adjustable pivot . This alternator has two internal Shop for Ford F-250 Alternator products with confidence at AutoZone. Also the check gauges light came on and when revving up the jeep, I smelled burnt rubber. How to Replace an alternator It comes complete with internal voltage regulator and pulley. A worn overrunning alternator pulley often blocks and performs like a solid pulley. We have them all. If the pulley is installed when the Overrunning alternator pulleys (OAPs) and overrunning alternator decoupler pulleys (OADs) are becoming increasingly popular on many late model vehicles due to increased alternator loads (higher amperage output often with smaller diameter pulleys, higher RPM) and engine torsional fluctuations. One of the first symptoms of an issue with an idler pulley is visible wear on the pulley. Overrunning Alternator Pulleys (OAP) are used on a number of late- model  Nov 22, 2013 Overrunning alternator pulleys (OAPs) and overrunning alternator While solving a similar problem, OAPs and OADs do have different  Check the size of the pulley on your alternator. 2. The following symptoms should give you an idea of what's gone wrong, but Troubleshooting alternator problems. The VW engine cooling fan is belt driven and is mounted to the generator or alternator shaft with the mounting hub. So I bought the Laser 3404 T50/1/2"D removal tool. Alternator / Generator Choose for Me to Minimize Cost Choose for Me to Minimize Cost Related Parts Alignment Tool Alternator / Generator Bolt Alternator / Generator Boot Alternator / Generator Connector Alternator / Generator Pulley Battery Charger Belt Belt Installation Tool Belt Measurement Tool Belt Tension Gauge Electrical Repair Manual This might also cause you to overlook critical problems. The OAD (Over-running Alternator Decoupler) pulley was designed to help with increased issues with harshness and vibration problems. I could not get my pulley off either so I ordered a new alt. Official March Products. This alternator is still maintaining a 13. Ford and Volkswagen MPV Forums » Forum » Small MPVs -- Ford C-Max / Ford B-Max / VW Touran: » Volkswagen Touran » Common faults and problems / Knowledge Base » VW Touran Mk1/ Ford Galaxy Mk2 1. It is a strong, well made tool and looked good on Youtube but unfortunately all that it did was chew up the female T50 in the end of the alternator's shaft! Which indicated that the alternator wasn't working. Why pay 200. IK was trying to seee what pulley would work off of my 70 351c onto my 66 289 Not many I gather I got a pulley for the crankshaft, but it was a triple groove. Metroplex Alternator & Starter carries a full line of alternator pulleys for any application. Not only is this noise annoying, but a slipping or loose pulley could mean other problems in the future if not fixed. We installed a PowerBastards. This tiny part makes it easy to start your car the instant it is stopped and recharges battery of your Nissan Rogue once you drive. More Power. Loosen the bottom alternator bracket bolts and then you can pull out the alternator. It could be susceptible to wear and tear damage or it may even come loose from the pulley. About INA. Understanding the Alternator • Alternator drive pulleys either bolt on or are pressed on the rotor shaft. It also provides convenience at an affordable price. I had someone install it for me and the damn pulley came off on me while I was driving today. The most recently reported issues are listed below. My brother also has the original solid one on his B4 with 300K on it, and no problems. Here are some of the warning signs that you have an alternator problem in your Mazda3 and how to replace it when it comes time. I swapped out my custom 8 rib pulley setup with another guy for his 6 rib pulleys, and alternator pulley he had seemed to be smaller than normal, and it is a good bit smaller than the one that came on the PA performance alternator. Test B - If there is little or no magnetic pull at the pulley shaft or at the rear bearing, initiate the following test: 1. belt tensioner. The belt issue is common on these cars due to the alternator pulley being a different width and depth than the pulleys on the engine. Alternator Decoupler Pulley (06B903119B) by URO Parts®. I've gone through three alternators now, and they all had the same problem: they don't seem to be charging the battery even though the idiot light seems to be working properly (key off indicator off, key on indicator on, engine on indicator off). Take time to look at the service information. Apr 26, 2006 We tell you everything you need to know about pulleys and why your just the bare essentials of an alternator and a mechanical water-pump, However, big problems can arise when you randomly mix and match pulleys in  Alternator, how it works, symptoms, testing, problems, replacement Pulley, Cable. rebuilding, tips to prevent alternator problems Learn your car: how different car parts and sensors work Alternator, how it works, symptoms, testing, problems, replacement See more What is an alternator in a car, alternator problems, symptoms, testing. When inspecting the drive belt, check for adjustment. *my buddy after hitting too many mud holes, his alternator quit charging, auto zone didn't have a new alternator for the non tow package, the tow package alternator is more expensive, I cleaned the mud out of the brushes in the parking lot and the old alternator has been good since, circa Oct 2015. ) Inside the alternator there’s a stationary set of windings, called a stator, and a rotating electromagnet, called a rotor. Peace of Mind. The 2007 Dodge Caliber has 12 problems reported for alternator failure. A mismatched pulley ratio and alternator can lead to big problems, especially at idle where alternator performance is critical. OAP pulleys have a one-way clutch inside the center of the pulley that slips and allows the pulley to free-wheel when engine speed suddenly drops. The image below represents a case where the crank pulley’s face is much thicker than the alternator pulley’s face. Now the search begins for a larger crank pulley or maybe a serpentine crank/alternator Pulley. You can't diagnose the condition of your alternator system if you just look at it. 00+. I'm going to clean the terminals since they are corroded. The alternator of your Haval H9 is just a significant piece in the event you plan to utilise your car. The key is to use a fatter belt that rides proud of the alternator pulley slightly. Shims are used to ensure it does not drag against the fan shroud. (of course you have to remove the back half of the pulley), slide on shim, slide on pulley, check clearance. The simple fix is to replace the 211/42-inch alternator pulley with a The alternator charges the battery and keeps the electrical accessories of the car working while it is running. Average repair cost is $350 at 128,000 miles. This means you'll need to transfer the existing pulley to the new alternator or buy a new pulley. If you have belt problems or   If the charging voltage with the engine idling is not at least 13. could you basically turn up the idle to like 1200rpm or less/more so that it will balance or just play around with the idle until the alternator and underdrive crank pulley both BALANCE out so that your motor won&#39;t be messed up? My vehicle (1999 Kia Sephia, 137000 miles) has had the brake and the battery indicator lights on, which from what I have read indicate an alternator problem. Then got a man with a air powered wrench to take the nut off the alternator pulley. This unit is standard equipment on all Sprinter alternators. A division of the Schaeffler Group, INA is a part of one of the largest automotive parts manufacturers in the world. For most vehicles the ratio should be at least 3:1. Lower alternator bracket (part #C7DE-B) Upper alternator bracket This may look a lot like the upper generator bracket, but the size and arc are just different enough that using the generator bracket may cause problems (part #10145-A) single-belt alternator pulley This may or may not be needed depending on the alternator you get. for more information IF YOUR NOT SURE OR CAN'T FIND WHICH PULLEY YOUR VEHICLES ALTERNATOR TAKES, Alternator slippage and undercharging can also be caused by a bad alternator pulley. I got the first one from him amd told him about our problems with the stock Cobra alternator. Have a helper run the engine up to 2500rpm and turn off ignition at that rpm, the alternator should continue to spin, in my case it stops with the engine. Indicators that warn of an impending alternator problem can include the dashboard warning lights, a growling or whining noise from the engine compartment, and the smell of burning rubber or electrical wires. Visit What is an alternator in a car, alternator problems, symptoms, testing. • Note this alternator does not have an external fan as part of the pulley assembly. If an automotive alternator (Question misses the assertion of where the alternator is, and what drives the alterntor), is deemed to be ‘overcharging’, then you need to look at all of the things that can cause a reduction in current. JC Whitney has rebuild kits, including some that convert the alternator for higher output. to/2HP40BP As an Amazon Associate I earn from qualifying purchases. Essentially this has completel y SOLVED any belt slip problem. If the noise persists then your alternator has outlived its purpose and it is time to Alternator Pulley Products. To calculate the actual alternator RPM, determine the ratio between the two pulley diameters. Im having problems with my 2009 pontiac g8gt alternator. Learn about this problem, why it occurs, and how to fix it. Can I use underdrive power pulleys? Will a higher amperage alternator cause any problems with my stock electrical system? What modifications will I need to  A mechanic advised the noise was from the alternator "clutch" and that a new alternator would fix the problem. Average repair cost is $500 at 86,100 miles. Since there’s no new part available, pulley for that matter, my mechanic did a work around. Accessory bearings which would benefit include the AC unit, water pump, alternator and power steering pump bearings. If you have belt problems or noise, check the alternator pulley. Can this bearing be replaced or am I going to have to buy a new alternator? Thanks for any help New Pulley [optional, but recommended] Battery [if required] Alternators provided by BMW are remanufactured in Germany. Is this likely? When you need to order a new Toyota Alternator Pulley, we're here 24/7. thanks OAP – Overrunning Alternator Pulley. Switch your multimeter to the lowest AC setting and reattach the test leads to the battery. An engine pulley is mounted to the engine of an automobile and drives all belts. A broken or seized pulley can quickly lead to The original alternator was designed to use a 15 series belt. The 65 amp alternator has a 2" pulley The 120 amp alternator has a 3" pulley to overspin the 65 amp to put out 120 amps and has a 120 amp regulator. Also, the belt could be misaligned with the pulley. This Offy alternator pulley is designed to fit on a GM alternator and is retained by a washer and nut. As the OE design experts on the Accessory Belt Drive System (ABDS), Gates manufactures a full line of alternator decoupler pulleys, including our overrunning alternator decoupler and one-way clutch pulleys, for smoother engine performance, increased efficiency, and improved belt This has to do with my '99 Z28, the car ever since I bought it has had a low alternator output at idle with the A/C on, in the summer time it'll read about 11v on the gauge on the dash, basically just above or at the red zone line, to cure this I installed an alternator from Mechman Alternators, it's a 170amp model, my problem is the alternator is pegging the volt gauge on the dash at first Problems with the Alternator's Decoupler Pulley. main pulley on the end of the crank (duh) that drives the accessories -- alternator,   I had it tested and it is fine - what could be the problem? When the belt is too loose, it can slip on the alternator pulley and, once again, not enough electricity is   Once I installed the INA alternator pulley it was smooth as glass. This bulletin provides information related to the ECM software upgrade and alternator pulley replacement for some 2013MY Sorento vehicles, produced from February 16, 2012 to September 13, 2012, to improve idle RPM stability (750 to 680) while at a stop with A/C ON. This unique tiny part permits you to start your car the instant it is stopped and recharges battery of your Haval H9 when you drive. Your alternator pulley may seem fine and strong, but when at work, it actually wobbles until it comes off your alternator. They do not include a pulley but do include a new wave washer and 24 mm pulley retaining nut. OK, I'll give them a call and get the skinny on that. If the pulley produces a buzzing noise for 1 to 5 seconds as the alternator Because differing ratios can affect performance, you should take care to maintain the same pulley ratio if you decide to use dress-up pulley sets. Kit includes 5" dia crank pulley, either Brace Bracket Mount or UALTM100A Heavy Duty Bracket, all studs, bolts and spacers needed (wire not included). shaft diameter. Can I lubricate   Mar 27, 2015 In conjunction with the alternator experts at Powermaster and MSD, . If an alternator fails, the car may still run for a short time on battery power. The Solid Alternator Pulley. Those devices include an alternator, power steering pump, water pump, air conditioning compressor and the radiator fan. 3. When turning anticlockwise, the pulley should free-wheel smoothly without grabbing, and not make any significant noise. Measuring across your crank pulley, you get 6 inches. The car now keeps a charge but it makes a loud screeching noise when in use and if you turn on the air conditioner it locks up the power steering and puts strain on the belt. My car battery was past warranty so I had the battery replaced about a Loose Alternator Belt Symptoms. In order to get your pulley ratio you would measure the diameter of your crankshaft pulley and divide it by the diameter of the alternator pulley you will be using. Overrunning alternator pulleys fail by either locking up and failing to over run properly, or by failing to lock up in the drive direction. If you are experiencing problems with the electrical system, the alternator itself might be fine because the problem could be with one of the belts connected to the alternator. Could it be another pulley? When I was working it I noticed the smell of fuel. There are times when it is necessary to transfer the customer’s old pulley to his replacement alternator. Align the alternator pulley with the engine drive pulley as shown in Figure 3 and tighten the bracket mounting bolts, securing the mounting bracket to the engine. A squealing alternator pulley is not only annoying, it indicates a problem with the car's belts or alternator. I need to replace my clutch pulley as it does not freewheel in any direction and the flapping drive belt has knackered the tensioner pulley. He used an old pulley that came from W124 and couple of washers to fit exactly the same as my Vito pulley. Overrunning alternator pulleys (OAPs) and overrunning alternator decoupler pulleys (OADs) are becoming increasingly popular on many late model vehicles due to increased alternator loads (higher amperage output often with smaller diameter pulleys, higher RPM) and engine torsional fluctuations. 0L V6 2007-2019: Freewheel Clutch/Pulley for alternator. I removed them and cleaned with a wire wheel on the bench grinder, but they are still pitted and not smooth. I've been trying to get the Mustang ready for the dyno, and I've been having persistent alternator / charging system problems. In addition, a tensioner is a relatively inexpensive part to replace. _____ 1957 Vintage Baja Bug. This will appear too big for the remaining pulleys but will work fine. Loud Noises: If the alternator belt or pulley becomes misaligned, a whining noise can This test before with the stock setup demonstrated a lot of slip on the alternator pulley. Make sure the belt is proper for the pulleys being used. I had elongated mounting holes and had to shim the holes with cut down pipe. Symptoms of a Bad or Failing Idler Pulley. If there is any length problems I will just buy a different belt as I could not find a 5/8 wide pulley that was 3 1/2 od The problem could be the pulley and belt drive system. rebuilding, tips to prevent alternator problems Learn your car: how different car parts and sensors work Alternator, how it works, symptoms, testing, problems, replacement See more What I meant is that if the pulley was installed incorectly it wold have been on an angle and put pressure on the alternator bearing due to not running straight. I have talked with Rick of PA about this problem with the STOCK Cobra alternator. When properly installed, the additional amperage from this unit will assure solid voltage even with high consuming electrical accessories like engine fans and blower motors, as well as keeping headlights from dimming at idle. 25 Years, Made in America! some say that an alternator pulley is not good for the motor, it could idle less, and it depends on the underdrive crank. Apr 1, 2009 There just isn't room for that many belts and pulleys anymore—not to mention, If you've ever needed three hands and a tire iron to pry an alternator away A squealing noise is indicative of a problem, but might not require  We've had lots of questions about crank pulleys lately, so here's all we know. Keeping a car’s battery charged is the job of an alternator. If yo use the larger pulley it will turn too slow at idle and you want get a full charge while sitting idling and you'll have flickering headlights etc. Pulleys and Clutch Pulleys. They cost $129. before i purchased it the dealer had new belts put on it I was wondering if maybe the tension pulley was not adjusted correctly and if it wasn&#39;t what kind of problems would i be having. If you do, you’ve got a bad diode and you need a new alternator. The Audi Garage are trying to save you a little money long term, but to save some short term, you could just have the pulley replaced leave the alternator belt and the tensioner + the cam belt etc But the decoupler pulley has a bearing in it as well as the alternator. Visual cues. On my '73 Dart I wanted a good charging system so I went the modern alternator-route. Each shim is approximately . NOTICE! When changing the pulley, keep the alternator shaft in the horizontal position and do not apply any pressure to end of the shaft. 5" alternator pulley and have 14. Re-manufactured and replacement alternators are larger in size and offer a higher output than stock alternators. And your alternator pulley is 2 1/2 inches in diameter. There are a few signs and tests you can perform to determine if the alternator is the main cause of your problem. I still have my original alternator but I can't find anyone around here that is willing to rebuild it. The MGA has a relatively small crankshaft pulley, so this alternator may produce less current at normal engine idle speed. The middle thin grooved crank pulley is driving the alternator only (and now the AC as well). When these were found to be too weak for the option-laden Porsche’s luxury sports sedan, they upped it to a 115-amp alternator to try to solve the problems these weak alternators were causing. 6L 5. Either DB Electrical AFD0110 Aftermarket Alternator for Ford Lincoln 4. A belt must run on the sidewall of the pulley, not down in the bottom of the groove. Pulley Problems I believe the culprit is the rough surfaces on both the crankshaft and water pump (Ford) pulleys. Unlike the OAD, this type of pulley simply removes possibility of jolting by allowing backwards motion to freewheel. However  Feb 17, 2017 fan, air conditioning, power steering pump, water pump and alternator Misaligned tensioner or pulley: If everything isn't aligned correctly Contact us today, we're here to help answer all your vehicle-related questions. But in most cases, the cause of the noise is a bad idler pulley. But would anyone have approx diameter and width of a pulley to use on a GM Alternator. You want the smaller one so if your old pulley is smaller swap it onto the new alternator and your good. Read more. Pulled it out and had it tested. AutoZone review with 53 Comments: I have a 1998 dodge caravan. Sometimes bizarre electrical problems can be caused by a number of faults other than the alternator. hey i had the same problems the only difference is my lights didn't dim but it was my tension pulley was froze up and had loosened the belt and caused my truck to lose charge its alot cheaper than an alternator Jeremy Manufacture starters and alternators for racing and show cars. When the alternator loses capacity or fails, the electrical systems will only stay on until the battery's reserve charge is depleted. Paying attention to the 10 trouble signs on this list can make it a little easier to diagnose car trouble caused by the alternator. Replacement pulley shown in this video https://amzn. would a loose belt cause my alternator not to work? i have just purchased a 2000 chrysler concorde with 55000 on it . The guy was partially correct. Watch the video. 6. But how do you know that the alternator may be failing? What are the common signs that you may have alternator problems? And, what are the solutions to these alternator issues? Luckily, alternator failure does have a variety of telltales signs which can help you spot the issue and find the solution before it causes any further significant issues. Another Every vehicle is composed of different kinds of special parts, among them is Alternator Pulley. The OAP pulley is similar to the OAD pulley, in that it is designed to smooth out the operation of the entire belt drive system. However, the engine will stall as soon as the battery charge is depleted. right now i am having a problem with my PULLEY INSTRUCTIONS: Use pulley from old alternator if this alternator does not have one or pulley supplied is different from pulley on alternator being replaced. Here are a few Frequently Asked Questions regarding alternator pulley design for today's An OVERRUNNING ALTERNATOR DECOUPLER™ pulley helps  If for any reason the alternator pulley is not aligned perfectly with the other pulleys on the engine, the alternator drive belt will slip. All our auto parts and accessories come with a low price guarantee. " referring to the alternator pulley. 3) Pulley ratio – In order for the alternator to spin fast enough to produce the power necessary at low RPM, the pulley ratio should be correct. An alternator charges the battery while the vehicle is running by turning mechanical energy from a spinning pulley into current. A diagnostic test from the parts store showed that the problem was our alternator. Symptoms of alternator problems Some common causes of alternator problems include wear and tear, a bad battery, a lost ground and a slipping belt. Alternator Pulley Swapping: Things to Consider . Keep in mind, the alternator on this car has a freewheeling clutch type pulley (also called an OAD – Overrunning Alternator Decoupler pulley) which may NOT feel rough. Using my Amazon links does not cost you any extra. Without this key piece of equipment, the battery would die after only a short amount of driving. If you need an alternator pulley for your car, truck, boat, forklift, lawn mower, or tractor we have it. Improved to address vulnerabilities in the original design, this Pulley resists the heat and dust that can cause the clutch and bearing to fail. My alternator was repaired- so the parts are as good as new. Calculating a pulley’s rpm can be very handy when it comes to optimizing an accessory system or sorting out problems. Works great. Is this possibly an alternator thing or maybe even the alternator belt? I read in the manual I should check the alternator belt for wear, tear and tension. Alternator/generator/regulator Problems of Chrysler Pacifica Chrysler Pacifica owners have reported 24 problems related to alternator/generator/regulator (under the electrical system category). The tension pulley as well because it is kind This alternator looks at home on all Holley driver's side LS brackets. If the alternator is the culprit, it could be because the accessory drive belt that spins a pulley on the alternator is worn and slipping. As you can see, the original pulley on the bottom has 6 grooves, and the new one on the top has 7. Replacing a broken, cracked or worn out alternator pulley is not very difficult, and it's something you can do yourself in half an hour or so. The additional rotations increase the charging supply. The harness appears to be from an early Niehoff set up. Changing the crankshaft pulley or alternator pulley will vary this ratio. With the engine running, you shouldn’t see any AC voltage. Also, the alternator pulley is only 1/2 a centimeter larger than the stock alternator pulley for NO CHARGING PROBLEMS !!!! Alternator problems What are the signs/symptoms if the alternator is not working as it should anymore. This will ensure a quality rebuilt alternator and help eliminate field failures. 9 dti had this, went through several belts and tensioners. “It’s important to find good, quality parts,” Gunning says. With almost 100 years of innovation and experience, Gates offers the highest quality OE parts on the market today. Similar noises can also be caused by bad shaft bearings on the water pump, alternator, belt tensioner pulley or power steering pump pulley. Don't let the alternator go bad while you're driving down the road, get ahead of the problem to detect alternator problems now. The alternator drive pulley is directly connected to the rotor. To check for this condition, increase the engine speed to 2000 to 2500 RPM, then shut off the engine. Jan 1, 2011 Premature alternator failure or de-coupler clutch pulley gone bad? shops will not gamble on the decoupler pulley alone fixing the problem! How to Replace a Pulley Bearing on Alternator Diagnosing and resolving overrunning alternator pulley problems How to replace alternator bearing?? Bearing  Tighten only enough so that turning the alternator pulley by hand rotates the crankshaft pulley. Notice the severe vibration in the belt drive system. Read more below. As my car was getting close to its last legs the shifts from &hellip; Have two alternator pulleys. Shop here and get the best deal on your Alternator Pulley purchase. Alternator Pulley for Tractor 5/8" Wide X 2-1/4" Diameter replaced the original pulley perfectly. I can order one from vendor but because I am on the ass hole of the planet its 3 weeks delivery , just wondering if guys are using a pulley from some other application that I can get locally. In fact, you can use this simple If your alternator makes a lot of noise then it could be that you are experiencing problems with the belt or pulley. I’ve found that, for me at least, the best and simplest way to get to TDC is by using the bottom 16mm pulley nut situated under the black plastic alternator pulley cover and finding the factory TDC mark on the flywheel. While you've got the alternator in pieces on the kitchen table, another pimptastic option is a shiny case or pulley and fan from the chrome aisle of the auto parts store. Next, disconnect the wires that lead from the back of the alternator. The best alternator swap is the small, light, Japanese Nintendo (okay, Nippondenso) unit that was phased in during the late 1980s. Parts are just part of what we do. Clutch Pulleys on Late Model Alternators You’ve probably already seen them: a pulley with a black plastic cover on it, or one with an extra thick hub and an internally splined or allen type nut. If the system is not charging, remove the alternator and have it inspected by a qualified alternator shop. How to Replace a Pulley Bearing on Alternator Diagnosing and resolving overrunning alternator pulley problems How to replace alternator bearing?? Bearing - Is a noisy alternator sign of imminent failure? my 2007 Dodge caliber has this pulley,its called the over running clutch pulley to prolong alternator life "YEA RIGHT" the pulley was chattering really bad sound like loud rattle nosie. According to Chrysler, this decoupler pulley (as they like to call it), ‘is a one way clutch type pulley, which is designed to help reduce belt tension fluctuation, fatigue loads, noise and has a low sensitivity to electrical load ’. Easy horsepower for only a couple of hundred dollars - and you don’t even have to crack the engine open for surgery! Wait a What is an alternator in a car, alternator problems, symptoms, testing. Serpentine belt problems usually result from one of three causes: a defective belt tensioner; misalignment of a pulley; or, defective bearings in the tensioner, idler, or one of accessories driven by the belt (including the water pump). On older vehicles, the battery light would turn on the alternator light when the alternator output or battery voltage dropped below a preset value. To determine if the problem is alternator related a volt or multi meter is required. The formula for determining pulley ratio is: Ratio = Crankshaft Pulley Diameter / Alternator Pulley Diameter. Left unattended, the problem that causes a pulley squeal will likely become worse and lead to expensive alternator or engine repairs. I run a 8" (2lb. If you are having problems with overall alternator output or charging at engine idle, maybe a smaller pulley is all you need. See more Powermaster Drag Race Alternator Kit 50 Amps B Email to friends Share on Facebook - opens in a new window or tab Share on Twitter - opens in a new window or tab Share on Pinterest - opens in a new window or tab You have a one wire Delco there. In other words what signs should i be looking for to confirm that it's the alternator that's gone bad. So I am having pulley problems. Dodge Ram 1500 Revised alternator pulley available if chirp is heard when turning - 5 reports. Tech Tip: Pulley Installation on Delco Remy 24SI or 28SI Set the alternator in the horizontal position on a flat surface. It is called a pully wear indicator or "wear strip". You can fix this by replacing the belt then properly aligning the belt to the pulley. This will cause the belt to slip across the pulley surface during belt and alternator speed fluctuations. When I started it there was a small amount of fuel This is a Master Alternator Pulley Removal/Service Kit. This is a problem when I am docking the boat. Search the catalog or contact us for a high output alternator for your vehicle today! Discover our simple tests to identify an overrunning alternator pulley that is near While solving a similar problem, OWCs and OADs are quite different in how  Nov 4, 2013 When faced with an illuminated charge light diagnosis on most late-model vehicles, do not automatically assume the problem is inside the  The starter & alternator in older, high-mileage vehicles has to be replaced more Often, the problem is not the starter but a low battery or a loose or corroded battery . This is a common test performed at dealerships and auto repair shops. If the belt is running in the bottom of the pulley it will slip, oftentimes without any noise, and heat the pulley and the alternator to the point a diode can/will fail. The alternator of your Nissan Rogue is undoubtedly a strategic element if you want to make usage of your car. Usually an alternator with bearings failure makes a loud grinding noise. I guess this would be alternator,generators,starters etc. When the revs would . A short chirp noise during engine start-up or shut down is most likely caused by a worn overrunning alternator pulley. They have diodes that can go bad, internal regulator, stator, rotor, etc. You can then determine the rotor speed using your known ratio: Some nice things about this set is the fact that all three pullies are billet aluminum for great weight savings and less rotational mass for each pulley. The rotor, brushes, and other internal parts of an alternator wear out over time, so replacing it is something everyone eventually needs to do. Stock type Alternator and Starters We will try to ship from the location nearest you. com 240AMP Alternator to cure the problem. 8", 4" and 5. Nippondenso externally regulated alternators (for Chrysler vehicles) may requirea Page 1 of 2 - facelift i-ctdi Alternator pulley replacement - posted in 7th Gen DIY: I had my alternator bearings replaced about a year ago, they were making a right racket. ) lower and 3. To avoid this, it is important to understand the alternator's capability at slow speeds. I’ve never had much luck using either of those methods. If the alternator is charging,the wiring is good,and the tachometer head is good,it should work. Honda CR-V owners have reported 22 problems related to alternator/generator/regulator (under the electrical system category). from this site,i should have it Friday. Overrunning Alternator Pulleys (OAP) are used on a number of late-model import and domestic vehicles. I installed a Balmar 90-75 alternator on my Beneteau 361 with a Westerbeke 30B-3 27hp diesel. Both are same diameter and shaft size. 2v charging voltage with engine idling in Drive at 500rpm, heater fan on full and the 2012-126 . If you are wondering about your alternator pulley, there is an easy test. Or refinish the original case and fan to taste. 2 days ago If you didn't have this pulley, then the alternator would not be able to do When it's a problem with the alternator belt, the flickering or dimming  Oct 29, 2019 The belt and pulley produce the mechanical power which gets converted reading on your voltmeter indicates you have an alternator problem. Installing an underdrive crank pulley in one of these older vehicles probably saved a few horsepower by slowing down the accessories like the water pump, air conditioning compressor, power steering and alternator, which was more than adequate to begin with. The alernator pulley that I have on it right now is the one that came with it which is 2. Alternator belt keeps jumping pulley (1997-1999) One owner with a 1997 1. Both are off 230ci engines. The inside diameter of the shim is the same as the Alt. Usually a bad or failing idler pulley will produce a few symptoms that can notify the driver of an issue. Alternator Belt Problems. #1 Maintenance FREE Serpentine Kits,Pulley & Brackets, Billet AC, Rods, Brackets and Accessories for American car models. The first pulley, the small diameter thick-groove, drives the thick-grooved water pump pulley AND the thick-grooved PS (unlike the early mustang which has PS and water pump pulleys with thin grooves). If the pulley is not in correct alignment with the belt, if it's canted on the shaft or if the bearings and bushing are worn out, the growling or whining noise will let you know there's a problem. Neglecting to test and diagnose the pulley can lead to unnecessary replacement. 2v. We changed the alternator and since then have had worse problems. com. 2006 GMC Envoy has 2 problems. I did find a resource about the pulley swap but I don't know what pulley would be correct and I don't want to end up with an overcharging problem. just swap to the smaller pulley of the two The 100-amp unit is a heavy beast requiring special brackets, and while the later one is viable (V-belt pulley is available) but still not the easiest one to deal with since it’s almost a one-off piece. One method to test the alternator is to perform a charging system test. The battery has one primary function, which is to start the car. (See our related article at the end of this car repair article for more specific information on this type of pulley and how to trouble shoot. The diodes are the electronic part of the alternator that convert AC voltage to DC. at idle and at WOT with NO PROBLEMS!! AMB The alternator rotor RPM is not necessarily the same as engine RPM. In order for the alternator to keep charging, it will have to continue to spin. Most Bosch type alternators are sold without a pulley. Why is the question. Dorman Products - 300-857 : Alternator Clutch Pulley. Testing the alternator and charging system is very easy DIY if you have a Charging System Analyzer. Replaced battery and all okay for about 1 month, then the new battery was dead. alternator pulley problems

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