AC compressor pulley seizes intermittently it will be difficult for the belt to get the compressor to start to spin. Valve Cover Wo Grommets Fits 95-97 Ford E-350 Econoline Club Wagon 7. The plate is tied to the compressor shaft. Because it. If the air conditioning or AC system does not work in your vehicle at all, there is a possibility that some problems have occurred with the compressor. You need to tell me if it cranks or not. If it is the whole unit, its going to be a hot summer in Georgia. AC pulley does not spin - 2000 Buick LeSabre Close. How to Tell if an Auto AC Compressor is Bad? years experience working on automotive air conditioning in Florida. Typical Subaru Air conditioning Problems explained. It did not sound bad, but then I took a string, wrapped it around the pulley, and got the pulley to spin fast (like a yo-yo). An A/C delete pulley comes with a free spinning idler pulley, mounted to a bracket that will bolt directly in place of your existing A/C compressor. have an assistant hit the AC button, you should see the face of the pulley pull in, at this point everything should be spinning. The AC pulley should spin easy by hand. my car was making a slight humming noise the othernight when i started it then i noticed the battery light was on i drove maybe 2 miles my car wouldnt shift to the next gear i put it in neutral for. With the car's ventilation controls set to "off," start the engine and look at the clutch/pulley assembly on the front of the compressor. If it is spinning and no cold air is coming out then it is an air flow (vent) problem. Generator, fans, water pumps and AC compressors all rely on. Wait for the AC clutch in front of the compressor body to engage and spin. Also note the AC will not cool properly when it's overcharged. When the system went bad, you could simply take off the belt and quiet the compressor. I could have saved a few bucks going with a different brand, but the cheap reman units were still over $200, so I figured I would just spend a lil more for an OEM one. Grab the CLUTCH and try turning that. So to install this AC belt you have to install the front two bolts in the compressor, leave them loose. The pulley turns whenever the engine is running, although the compressor clutch is not engaged when the air conditioning is turned off. Water pumps, alternators and power steering are nice things to have. The free-rotating pulley and non-energized clutch coil stop compressor operation. And then bursts of a louder noise here and there. ac clutch not engaging? ac compressor not engaging? How to test your A/C clutch and coil using only a paper clip or piece of wire. Pulley out of alignment. The pulley is free to rotate without turning the compressor crankshaft any time the clutch coil is not energized. I think he was checking the pressure being built by the compressor. Have an assistant turn on the AC controls to maximum. If it did not then you would have a toasted belt. Once you turn on the AC the center part of the compressor, the AC clutch should engage and start to rotate with the pulley. MFG Name SMID MFG Model MFG NO. A compressor is two things An idling pulley when disengaged and that pulley locks (engaged) when so and compressor is pumping unless seized. In order to get to the ac compressor i reomoved my air. Hello to one and all. You need to tell me if it cranks or not. 0L A/C AC COMPRESSOR CLUTCH KIT (PULLEY BEARING PLATE) Low Price that is perfect for you, right to your door. However during normal AC operation the clutch operates in a continuous on/off/on condition to stabalize the freon pressure. This in turn engages the drive pulley to the compressor input shaft, causing the shaft to spin. From underneath the car, I managed to unclip the harness and check the voltage going to the clutch. At first I thought it was the tension pulley but I replaced that today and the sound is still there. What could be wrong with my air conditioning compressor?. Bad AC Compressor Symptoms. When you turn the AC on, nois isnt as bad but still there. ac compressor pulley won't turn when i turn the a/c on, the compressor pulley (or whatever it's called) is wanting to turn but it's just not turning. The pulley bolts in place of your compressor to retain your belt routing, but the belt only spins the pulley rather than powering the faulty compressor. Not sure what would cause the pulley to do this. So today the compressor clutch pulley bearing started smoking and making all sorts of nasty noises! I was fortunate to have been able to shutdown the engine before it burned the belt or destroyed any additional parts! The repair took about an hour and a half and the bearing was about $25. This is a video that is geared towards people with an AC compressor clutch that doesn't work. You might try turning it more and see if it loosens up. The center of this clutch should be spinning when the compressor cycles on. Make sure Puller Jaws are tight and secure on the pulley as they'll want to come off once it begins pulling. So the pully spins fine, that's not much of a surprise. Find our best fitting a/c compressor bypass pullies for your vehicle and enjoy free next day delivery or same day pickup at a store near you!. AC bypass pulleys are much cheaper than a new AC compressor. It is a single wire to the back of the pulley. But you cannot use your air conditioning system when that happens. When the A/C is activated, the compressor clutch transfers power from the engine's crankshaft to the pulley mounted on the A/C compressor. Package include: 1 x Pulley 1 x Electromagnetic coil 1 x Clutch plate. Blowing nitrogen through wont push out any oil, and it will take a lot of refrigerant to do so also. That is not your compressor then, Have a look for the front of one of the pulleys spinning with the aircon on and then it should stop with the aircon off: this is the clutch mechanism, the pulley continues to spin but the center does not. I know that if an ac compressor won't spin at all that it is locked up, and that is bad, but I thought the ac compressor was supposed to spin when not on/under load. My car has 167000 miles. BMW A/C Belt replacement Procedure The ac belt on your car is a strech belt with no belt tensioner. Now try to turn the clutch plate by hand, that will turn the ac compressor. The AC pulley should spin easy by hand. I'm nearly certain it is the AC compressor clutch & pulley mechanism (Toyota part no. If you're able to push the connection down, it seems like your using the quick connect fitting properly. ac clutch not engaging? ac compressor not engaging? How to test your A/C clutch and coil using only a paper clip or piece of wire. We have 2000-2006 JEEP WRANGLER 4. If you can't spin it, or it's very tight the compressor is the issue. Start the engine and let it warm up. Eventually the clutch shaft actualy failed and i had to remove the drive belt to be able to drive home. When a vehicle rolls into your service bay for an inspection or any other problem, it’s a good idea to make sure that the vehicle gets a good visual check as well. The rebuilt compressor I installed came with the pulley installed on it. 1 Micron Filter 100 Watt 12 Volt 150 Watt Solar Panel Agriculture Forestry Barrel Heater Biodiesel Centrifuge Biodiesel Heater Biodiesel Processor Biodiesel Pump. It has never been installed or used. Yep outer part of the compressor is not turning, just the belt pulley. AC compressor pulley seizes intermittently it will be difficult for the belt to get the compressor to start to spin. BMW A/C Belt replacement Procedure The ac belt on your car is a strech belt with no belt tensioner. It would. However, the idler pulley and the AC Compressor both were spinning just fine. You should also be able to turn it by hand. com offers 1,344 ac compressor pulley products. It may just be internal corrosion if the compressor was not sealed at the ports. In this article, you will learn what you can do during such a situation. Those devices include an alternator, power steering pump, water pump, air conditioning compressor and the radiator fan. This is also a great alternative for an older car that still runs great but is suffering air conditioner problems as well. If you're not ready to replace a damaged A/C compressor or clutch, consider an A/C compressor bypass pulley. Now, turn on the air conditioning and look. Any suggestions. voltage runs from your fuse box. A little noise most of the time but nothing alarming. The ac compressor switches on and off every 4-8 seconds. Is there any other way to hold the shaft so I can get that nut off. The pulley is free turning until a/c is activated which then applies electro-magneticaly the clutch assy to the pulley only. When you look at the center of the AC compressor when the engine is running and the AC is off you should see the pulley free spinning and the very center of the pulley won't be spinning, that is the clutch Dis-engaged. com * BMW E60 M5 Belt Drive Climate Compressor. I jsut have not been able to find a bypass. The pulley should spin freely and not turn anything in the compressor itself. When AC compressor failure happens, it’s often due to an underlying issue that causes stress on the. If the compressor engages, the problem is probably low pressure. What does this mean to the owners of the Fusion? I should start by saying there are many reasons why your car's A/C can stop working. In simple terms, an A/C Compressor is a pump. Yea, agree, any time an AC system (home or auto) is opened to atmospheric pressure a complete vacuum is a must. After It "locked up" I put the belt back on it and the engine couldn't even turn it. Between the pulley and compressor is an electricmagnetic clutch. When the A/C is activated the compressor is engaged. Take the Puller Kit (5) and Puller Jaws (6) and configure it as shown in the image below. We have 2000-2006 JEEP WRANGLER 4. Basically the little guide wheel for the fan belt t othe AC. An A/C compressor can use a lot of the engine’s energy, hence it does not always activate while the engine is running. Wiki User 06/24/2011. Yeah, When I was spinning it by hand, it looked like it was spinning with metal touching metal. But on the Fusion, if the A/C compressor is not turning on, you will need to change the Evaporator Discharge Air Temperature Sensor. Also note that this is compressor RPM, not engine RPM. It sounds like the compressor locked up, but it could be the clutch and pulley have definitely come apart. AC problems, compressor not engaging VW MKIV-A4 TDIs (VE and PD) Well, i was hoping it wouldnt come down to that, but it did. Its difficult to diagnose without seeing it, but if you look at any modern AC compressor, the pulley that the belt is around will always spin, regardless of AC on or off. Then look at the front of the compressor clutch. (Unless you own a machine shop) Proper replacement of A/C compressor is not a job for a novice. is still good. The pulley is belt-driven by one or two V-belts directly from the engine's crankshaft or by a multi-ribbed V belt or serpentine belt. The pulley wobbles quite a bit when it's spinning. When it's not driving the compressor, the clutch pulley turns on a double row of ball bearings. Inspect more carefully. How to Tell if an Auto AC Compressor is Bad? years experience working on automotive air conditioning in Florida. Belt squealing when AC starts. Thankful that I could remove the Targa top, I would have melted without AC or an open top. If the source of the sound is the AC Idler pulley, it should occur regardless of wether the AC is on or off. I recently decided to take a crack at trying to fix it. February 1, 2018 — A GM air conditioner compressor and condenser lawsuit alleges the AC systems fail and cause owners and lessees to lose cold air in the vehicles and money from their bank accounts. Replacing a car air-conditioning compressor is expensive and harder than it looks. The air conditioner (A/C) cutout relay is designed to shut off the air conditioner compressor, by disengaging the A/C compressor clutch. If it's the compressor making the noise and not the pulley/clutch, that should work. Have 34K miles on the car, not sure how AC components fail this early? I was reading that sometimes a AC refill solves these types of noises. Fixing AC compressor problems increases the unit's efficiency and extends its life. - With the engine on and the AC pushbutton depressed, the pulley does not rotate and belt smokes. Vehicle Level Heating and Air Conditioning Compressor HVAC Compressor Clutch Service and Repair Service and Repair Notes DENSO A/C COMPRESSOR REMOVAL NOTE: The compressor clutch assembly can be serviced with the refrigerant system fully-charged. When the compressor clutch is not engaged, the input shaft of the compressor does not spin and the drive pulley freewheels on a sealed bearing assembly. 5 years, its been great. Whether it's a full-size unit or a window AC compressor not turning on, Repair Clinic can help you reach your optimal air temperature for comfortable habitation. So - if you didn't compromise the face seals when doing the bearing repack - you are probably fine. is the problem in the clutch coil or low pressure switch or else ? when i check the low side is too hi about 60 and high side is 130 this means that system not empty and problem is why the low side is too hi ? when i turn on the ac the. This is not a C5 compressor. What could be wrong with my air conditioning compressor?. Get the job done with the right part, at the right price. The Compressor pulley will spin free when the clutch is not engaged. I have a '97 Pathy, and the bearing on the pulley in front of the compressor is making a constant grinding noise, whether the clutch on the compressor is engaged or not. A bad AC compressor clutch needs immediate fixing. A freshly packed bearing is actually nice and tight and should not wwwheeeeeee when you spin it. What is an AC clutch compressor. I looked at the compressor clutch with the engine running and the AC on, and it wasn't spinning. The â  keyâ  usually. - No AC - Poly V-belt shows signs of degradation. I listened to the noise with a mechanics stethoscope and determined that the noise was either coming from the air conditioning compressor pulley bearing or the belt tensioner. Shouldnt they be hot and cold if there is refrigerant in the system. Thanks all. Thanks Jake. if the ac compressor pulley is not turning could that be related to the alternator going out - my car was making a slight humming noise the othernight when. There should be no noise from it at that time. If the compressor clutch is not engaging, there are many possibilities. I suspect it is turning. The most obvious symptom is when the air conditioner does not blow out cold air anymore. cabin ac button has no effect meaning it doesn't load the engine. So the pully spins fine, that's not much of a surprise. A little noise most of the time but nothing alarming. To convert MPH to Knots, divide by 1. If only the pulley is turning, but the clutch disc isn’t, there’s a problem somewhere in the system. Is it possible to remove the three bolts without removing the lines so I can mount a new compressor and keep it unplugged (electrically) and the caps in so the holes are plugged just to have a free spinning pulley so I can relocate the truck to my house to finish and do it the more proper way?. I listened to the noise with a mechanics stethoscope and determined that the noise was either coming from the air conditioning compressor pulley bearing or the belt tensioner. If inner triangle is NOT TURNING, most likely the system has lost its freon and the safety switch has turned. When you turn the AC on the Clutch should engage and allow the compressor to work. I suspect it is turning. And then bursts of a louder noise here and there. Looking for replacement part, and I'm getting a quote for £60+ for the pulley only from TPS, or a new alternator for £125 including my old unit. If it is spinning and no cold air is coming out then it is an air flow (vent) problem. When the pump disengages, the pump stops turning and the outer items become free agents turning on there own beaing. The AC compressor pulley is always being powered by a belt. 6 with 150000 miles. Push on the new one, circlip on, outer pulley may need some lube to go back over the rubber. Yeah, When I was spinning it by hand, it looked like it was spinning with metal touching metal. As some of you know, during the 2014 Convention the bearing in the AC compressor pulley exploded during the trip out to Karting. Blowing nitrogen through wont push out any oil, and it will take a lot of refrigerant to do so also. Nothing fancy, you understand. Compressor For Chevrolet Cobalt / Spin 1. ac clutch not engaging? ac compressor not engaging? How to test your A/C clutch and coil using only a paper clip or piece of wire. (More than I make in 2. have an assistant hit the AC button, you should see the face of the pulley pull in, at this point everything should be spinning. Install it and have it properly serviced. AC compressor pulley seizes intermittently it will be difficult for the belt to get the compressor to start to spin. Yes the compressor pulley should spin at all times. Get the job done with the right part, at the right price. Will low refrigerant level cause the AC compressor clutch to not engage 15 Answers. Belt squealing when AC starts. The compressor has a pulley and clutch assembly on the front to allow the belt to always be attached to the engine, and to also allow the compressor to engage and disengage with the clutch. So, Where to begin? It wasn't difficult to spin the compressor pulley by hand. Make sure Puller Jaws are tight and secure on the pulley as they'll want to come off once it begins pulling. plate that is attached to the pulley is spinning all the time. If inner triangle is NOT TURNING, most likely the system has lost its freon and the safety switch has turned. It did not sound bad, but then I took a string, wrapped it around the pulley, and got the pulley to spin fast (like a yo-yo). Did not want to charge the system if there is refrigerant at the correct level. When you turn the AC on the Clutch should engage and allow the compressor to work. While cranking compressor should be off but if bearing of clutch welded up would turn compre. I'm just bypassing the failed compressor, using a working compressor instead of an AC bypass pulley. The belt should not slip on the pulley. Id certainly be pushing for a good will gesture!. 2) Seized Compressor Grooved outer pulley spins freely with the A/C off (the clutch disengaged), but when the A/C is turned on, the belt has a hard time turning the pulley, resulting is squeaking or burning smell as. Third, the A/C compressor relay is a $4 throwaway part, like the fuel pump relay. When the compressor clutch is not engaged, the input shaft of the compressor does not spin and the drive pulley freewheels on a sealed bearing assembly. (With everything off, the pulley is riding on its bearing, but is otherwise not engaged with anything else. At least I narrowed it down to the A/C. With the engine not running and belt off the pulley should spin free. - 2 are you sure that the clutch is not jaming up against the timing belt cover and jaming against that - tight fit between the belt cover and the fuel tank. Recently, Friday, I discovered the pulley on my AC Compressor was not spinning. Then look at the front of the compressor clutch. Motor running, AC on max, fan on high. It is physically identical to the DA6 with two electrical connections. The AC Compressor serpentine belt has jumped off the pulley on the compressor twice now within the last 3 months and when it does the AC belt rides on the engine crank pulley. I know that if an ac compressor won't spin at all that it is locked up, and that is bad, but I thought the ac compressor was supposed to spin when not on/under load. When the A/C is off, the outer pulley turns with the belt, but the compressor does not turn. A wide variety of ac compressor pulley options are available to you, such as v-belt, round belt, and flat belt. The pulley is belt-driven by one or two V-belts directly from the engine's crankshaft or by a multi-ribbed V belt or serpentine belt. Also note the AC will not cool properly when it's overcharged. So you would be looking at replacing the bearing (or entire pulley and clutch or even the entire compressor) or if you're feeling really ambitious and dont want AC ever again, you can remove the AC compressor and install a bypass pulley made by motormite which is sold at most auto parts stores under the "help" or "needa" lines. Single and double v-belt pulleys as well as several poly-groove serpentine belt applications attach to the A-6. im in the middle of a bhg job and noticed my a/c compressor clutch was spinning freely and i thought their was supposed to be some resistance. The compressor puts the air conditioning refrigerant under extremely high pressure. My air conditioning compressor made the same noise on my 2005 2. The most likely answer is that there is a leak in the system and the refrigerant has escaped the system although there are problems with that explanation. - With the engine on and the AC pushbutton selected for off, the pulley rotates. This is possible since there is a clutch inside the pulley for the A/C compressor. To answer a statement made earlier, no Refrigerant (freon) does not dissipate unless there is a leak in the system. If not or if it is hesitating you may need to try another spacer. I have a '97 Pathy, and the bearing on the pulley in front of the compressor is making a constant grinding noise, whether the clutch on the compressor is engaged or not. I checked clutch coil resistance and found it had infinite. Wait for the AC clutch in front of the compressor body to engage and spin. That is not your compressor then, Have a look for the front of one of the pulleys spinning with the aircon on and then it should stop with the aircon off: this is the clutch mechanism, the pulley continues to spin but the center does not. A compressor is two things An idling pulley when disengaged and that pulley locks (engaged) when so and compressor is pumping unless seized. So I called the company and they want to sell me a new compressor cause " it will save me money in the long run". This places a load on the engine and the drive belt that rotates the compressor. The grooved wheel spins inside the frame of the sheave. Yes you can remove the pulley from the compressor without discharging the AC but bear in mind the pulley is also part of the magnetic clutch assembly so make sure you make a note of all the parts that come off with it,how they fit back together and don't lose any. and the system doesn't need to be charged or checked, because it won't be operational. But it doesnt sound any different. 2L GAS; 1994 - 2001 Dodge Dakota V6 3. But first, know some facts about an AC clutch compressor. Pony to be caused by hand because all the stuff is very near the air pressure or viscosity of the lift driving and is produced in the outer edge of the headlight. If you need a compressor bypass pulley, check out the options at O'Reilly Auto Parts. I havent used a/c in years so i just wanted to try turning it on and the light on the button doesn't come on anymore. plate that is attached to the pulley is spinning all the time. Seized compressor pulley bearing (but the pulley would not be turning) (There are other causes for A/C to not work including too much refrigerant or too much oil--but since yours had been working, these are unlikely) Here is some info on diagnosing A/C system problems:. Should I try to add refrigerant to engage the ac? The attendant yesterday did not even try to add refrigerant, so I dont know if that is an. So, here is how all the various parts of a car's air conditioning works: Compressor: The compressor is the work horse of the air conditioning system, powered by a drive belt connected to the crankshaft of the engine. What would cause the clutch on the a/c pulley to slip and not completely engage? (2000 Ford Taurus) Then one extremely hot day while using the a/c, made a stop and left the motor idling and a/c on. My two thoughts are air gap or low pressure even though I've pumped it full according to my ac pro gauge. Any help would be greatly appreciated. All other heater functions do not cause the problem. As he denied 2 compressors after this pulley spin test. Overview of Pulleys & Sheaves (5088-PS) — A sheave, is a pulley with a grooved wheel for holding a belt, wire rope, or rope. That was the first time I could hear the noise. I at first thought a battery problem but after cleaning, charging, and testing it the battery is fine. is still good. It did not sound bad, but then I took a string, wrapped it around the pulley, and got the pulley to spin fast (like a yo-yo). Removing the electrical connector will keep the A/C clutch from engaging regardless of how you have the HVAC panel setup inside. The AC compressor pulley is always being powered by a belt. The pulley can be turned independant of the compressor and the compressor can be turned independant of the pulley - provided each time that the clutch is not engaged. My air conditioning compressor made the same noise on my 2005 2. I checked the single wire to the the AC compressor, and it gets the 14v signal when the AC is switched on. At least I narrowed it down to the A/C. Have an assistant turn on the AC controls to maximum. I'd be VERY careful about running it until you have it fixed (or at least looked at by a CERTIFIED A/C shop). So that the compressor is not always turning, there is a magnetically operated clutch between the pulley and the compressor. This pulley calculator analyzes a system of two pulleys joined by a conveyor belt (also called a belt drive). Turn the air conditioning controls to MAX AC and start the engine. So the culprit is the clutch pulley thing, which can be bought separately from the whole compressor itself. Look at the compressor pulley when the A/C is off, but the engine is running. This varies, not least with something that has rear air. com offers 1,344 ac compressor pulley products. I was under the impression that the pulley could be pulled off and replaced, but a local mechanic is telling me that it needs a whole new compressor because it's all one assembly. The compressor itself is, however, only engaged when you turn on the A/C. I'm not at home to look at my wifes Tib, but as a check, you could remove the AC belt and try spinning the compressor shaft by hand or with a wrench (it's the inner part of the clutch, not the "ribbed pulley"). Replied by dreamer2355 on topic A/C compressor not turning Did you try to free-wheel all the pulleys to see if you have any issues there apart from the Ac/C compressor? I would also check for belt alignment. There are a few symptoms you can look out for to know when you have a failing AC compressor. You should. My little brother's pulley compressor was squeaking, 2003 Double Cab 3. Could definitely cause the smoke, break the belt and stall the engine at idle. My car just started doing thew same thing! I had a mechanic where I work look at it and he said it's probably the little pulley just under the AC compressor, I think it's called the pulley tensioner. Any help would be greatly appreciated. After installing the clutch, cycle the A/C clutch 20 times (5 seconds on and 5 seconds off). Will low refrigerant level cause the AC compressor clutch to not engage 15 Answers. The pulley on the compressor is always running when your engine is running, but the only time it compresses the freon is when the clutch engages, if the compressor's pulley was not turning, it would have already snapped a fan belt or your serpentine belt. If you replace the whole compressor, you must also replace the receiver/dryer, and often the expansion valve, and recharge the system, which incurs additional costs. Both the pulley and the clutch should be spinning. usually i use a power probe but this is for the average do it. I listened to the noise with a mechanics stethoscope and determined that the noise was either coming from the air conditioning compressor pulley bearing or the belt tensioner. We do that in several ways. That pulley is not spinning at all. The center of this clutch should be spinning when the compressor cycles on. What could be wrong with my air conditioning compressor?. Install it and have it properly serviced. It seems to work, the air conditioner cut in and out but then the current temperature is 13*C and cooling (I can see snow on the top of the mountain from my house at the moment) so it's probably didn't need the air-condition for cooling! I also removed the idler pulley and set it up in the drill press to spin it while I sanded it smooth again:. The AC pulley should spin easy by hand. I bought a new one and installed it, but it isn't turning the compressor when engaged. I am trying not to take the compressor apart if possible as I just had it charged. If you can't spin it, or it's very tight the compressor is the issue. The pulley is free turning until a/c is activated which then applies electro-magneticaly the clutch assy to the pulley only. The pulley is belt-driven by one or two V-belts directly from the engine’s crankshaft or by a multi-ribbed V belt or serpentine belt. voltage runs from your fuse box. But you cannot use your air conditioning system when that happens. If the middle of the pulley is not spinning you can try to get a multimeter on the electrical connector and read the voltage when the. As some of you know, during the 2014 Convention the bearing in the AC compressor pulley exploded during the trip out to Karting. I have a '97 Pathy, and the bearing on the pulley in front of the compressor is making a constant grinding noise, whether the clutch on the compressor is engaged or not. But first, know some facts about an AC clutch compressor. I've got a whine coming from my front end. The clutch not being able to be spun by hand has caught more than one experienced mechanic off guard. Doesn't take long to destroy the belt from friction. now when you click the AC button on, it looks the exact same, no difference, the pulleys all spin, but the front of the AC compressor does not Spin, at all but the pulley does. Realign motor pulley with compressor flywheel. The only system that was left untouched was the AC system, which I haven't had any problem with. Thankful that I could remove the Targa top, I would have melted without AC or an open top. What can cause the clutch to stop engaging?. Go ahead and throw in a can until you get cold air. The pulley is free to rotate without turning the compressor crankshaft any time the clutch coil is not energized. However during normal AC operation the clutch operates in a continuous on/off/on condition to stabalize the freon pressure. You will observe that the belt that turns the AC compressor pulley, will continue to rotate and the outer part of the. I will replace the compressor with a pick& pull unit before hot weather gets here. A1 > Audi Workshop Manuals > Heating, ventilation, air conditioning system > Heating and air conditioning > Air conditioner > Air conditioner compressor pulley > Removing and installing pulley on "Denso" air conditioner compressor - version "3". BMW A/C Belt replacement Procedure The ac belt on your car is a strech belt with no belt tensioner. I have checked and it is definitely jammed as it's not turning either way. If only the pulley rotates, there must be an issue in the system. I replaced my compressor last year. That means the clutch has properly engaged with the pulley. When she got home, I quickly realized the problem: the AC rotor pulley wasn't spinning and the serpentine belt was just dragging across it! I took the clutch off and it was pretty shredded. Even tape is good enough, a there should have been slight residual oil layer on the metal surfaces. I checked clutch coil resistance and found it had infinite. is still good. Hello to one and all. My Heat Pump Fan Is Not Spinning Pull the bad belt off the blower pulley, then remove it from the motor pulley. Today is the first time I've started it since then and it appears the AC compressor has seized. I know that if an ac compressor won't spin at all that it is locked up, and that is bad, but I thought the ac compressor was supposed to spin when not on/under load. com Forums. ) If the drive belt is still disconnected, then open the hood (engine off) and manually spin the AC compressor pulley. Push on the new one, circlip on, outer pulley may need some lube to go back over the rubber. When the AC is turned on, the clutch disc on the front of the pulley is pulled into the face of the pulley which is still spinning with the bearing.