If the fan spins more than three times, you may have a bad fan clutch. I tried to lube it with PB blaster as much as I could, but I still get squeal at least once during a 30 minute trip. Listen to the washer's spin action, if it can spin at all. so what goes wrong with a fan clutch that would make the car overheat? 5.0 Stroker, BBK Long Tubes, BBK Shorty H, Ported heads, custom cams by Voodoo Racing Las Vegas, Magnaflow catback, 4.10's, Lakewood 90/10-50/50, Zoom! Not sure if supposed to have a bolt or if will come off again? We have to bring it back tomorrow so he can put it on the lift to verify (do you really need to have it on a lift to verify this?). My bimmer makes the "turbo" noise related to engine speed when it's hot - … new compressor always equals new receiver/dryer , accumlator unless you want it to fail prematurely. Mine still feels like its constantly cooling though whenever I use the manual climate control … Compressor runs with motor with the help of the belt. Most AC clutches are designed to spin freely when disengaged, and also with the pulley and compressor when those are engaged. Be sure the car is secure while you are doing this. On off A/C switch in passenger compartment does not light up. That depends on the the system. 2007 Toyota Yaris. Changing the compressor clutch could be the only solution in this case. A search of Google images will give you the location of the AC relay. You can hardly hear or feel it idle. If the clutch spins freely at all times, and the compressor never comes on, then it may not be engaging and therefore needs to be replaced. I have noticed on the foggy mornings that the water is condensing on the outside of the windshield also when the vent is on. When this happens, the engine... Hello! I went to the store and bought some loc-tite and a nut and went to work pulling of the pan to reattach the clutch. If the clutch spins freely at all times, and the compressor never comes on, then it may not be engaging and therefore needs to be replaced. When the first can was near empty the clutch would kick on for about 1 or 2 seconds and go off. Wait for the AC clutch in front of the compressor body to engage and spin. What will keep this on the there? One is for ground and one for the 12-volt power cable. Electronic types might freewheel, but most fan clutches should spin with a little effort. Your AC compressor should spin freely without the AC clutch engaged, for example with the defrost and A/C switches turned off. The low-pressure switch tells the car that the clutch needs to engage and disengage and will shut off the A/C compressor. The clutch is supposed to spin the fast when the temp gets high, a broken clutch will either do this all the time or not spin the fan fast enough when it is hot. A delay can cause serious damage to the air conditioning system and the engine. i don't really understand what that means. If it does not, shut the engine off and disconnect the negative battery cable with a … @fusebox. So it goes on then off 8 times per munite this is normal . I recommend a fan clutch replacement as soon as possible, performed by... Blue smoke coming from your exhaust generally means that the motor is burning the engine oil. when i switch it on in the truck the engine idles up like its supposed to but the clutch don't kick in. So i bought a used one from a member and his spins freely also...is the ac compressor clutch supposed to spin freely . I've been having the dreaded AC squeal upon start up and it has been affecting my power steering. It is an ominous sign when the clutch engages but the compressor does not spin. Hello, thank you for writing in. I think so this pully controles this requirement. If you look at the center of the pulley, when the a/c is off, the central portion of the pulley should be stationary. This reminds me of a similar experience I had last summer. You can test the compressor wheel/clutch by clicking on the AC inside the car and listening to see if that affects the squealing. Do you think i have to replace the compressor? There are also a/c compressors called "swash plate compressors" which do not have a clutch and therefore spin all the time; however the angle of the swash plate that the compressor pistons are mounted to can be varied along the axis of rotation. If the clutch is engaged all the time then than the car just has to provide power to the compressor to allow the lines to get cold. Signs of Worn Fan Clutch. 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. Replace the fuse if the filament has melted or blown apart. Jun 7, 2016 at 10:23 AM #1 #1. crammit442 [OP] New Member. Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance, Over 25,000 topics, from beginner tips to technical i just bought another a/c compressor. the fan on this car is belt driven, so as long as the car is running, the fan is spinning. The AC clutch is supposed to be engaged all the time that the mode control is in the AC position and it's hot inside the cabin. Checked all the fuses and relays for the AC, they were good. technicians, Trusted mechanics, rated by thousands of happy car They do go bad too. My question is, why is this happening? It is an ominous sign when the clutch engages but the compressor does not spin. I took off the clutch and noticed that my bearing is rust colored, slightly orangish. At higher coolant temperatures, the switch closes to start the cooling fans. If the clutch spins freely at all times, and the compressor never comes on, then it may not be engaging and therefore needs to be replaced. A bad AC compressor clutch needs immediate fixing. Answer: Most fan clutches engage at about 170°F air temperature (about 180-190°F engine temperature). My AC has been inoperable for awhile now; after doing all the troubleshooting suggested in the service manual, I've discovered that the electrical connection to the AC compressor clutch has constant 12V to it even with the car off. If it does not, shut the engine off and disconnect the negative battery cable with a socket. Does it spin when running or stay stationary? But that's not how it's supposed to be, I have a clutch for a reason. Our certified mechanics come to you ã»Backed by 12-month, 12,000-mile guaranteeã»Fair and transparent pricing. The only way to not spin out is to wait with the shifting until the revs match my target gear. If the clutch doesn't engage, which is the most likely situation, either you are low on freon, the AC clutch relay is inop, or AC compressor fuse is open (blown). Remove the connector and force it with 12v and ground. I say that because it doesn't engage until you tap of the clutch. Since it stays on all the time, I would first try turning off all fans, in the bunk, and on the dash. It is not always the cause though. So my wife took her 03 MDX to the shop today and they said it looks like the AC clutch is not engaging. '97 4runner, auto, 4wd, SR5, 3.4L. It's threaded and screwed right back on the ac compressor next to pulley. do it right or not at all but it will probably cost half of what your car is worth maybe more Look for the AC relay in the fuse box. Mine is stuck engaged all the time. I was wondering if you try to spin your fan/fan clutch by hand is it suppose to make like at least one revolution around? Look for the switch that the clutch pedal is supposed to push in when you push the clutch pedal down. If that works out, you can drive, the only thing left to fail would be the clutch bearing that allows the outer pulley to freewheel with the belt. You can pull out the relay, carefully remove the cover, reinsert the relay, and engage the compressor clutch by manually closing the relay contacts. I have replaced expansion valve, dryer, Freon. Pull out the AC fuse and examine the filament inside the fuse. Discussion in '4Runners' started by crammit442, Jun 7, 2016. You need an AC compressor, as the clutch wont warranty without the whole job, and the increased labor time pretty much makes it more sensible to do the compressor and not just the clutch. I have seen that complicated pully to drive the Compressor. Looking at the repair information for your vehicle, it looks like the module bolts to the bottom of the headlamp assembly and... Hello - while it is possible that there are simply loose nuts/bolts for the fan, it is most likely the fan clutch is failing, hence the wobbling fan. The headlamp control module is used to control the lights. Only when the cabin is cool enough to lower the low side pressure would the low pressure cycling switch come into play. Clb Another old truck Supporting Member. Try moving the fan forward and backward. The front clutch will be hard to spin but if you spin the actual pulley where the belt rides it should spin free. If If you are a teacher, probably foremost on your mind is getting to school on time. 2. GM/Ford used to use a cycling clutch orifice tube design as it was supposed to cycle if volume got low but not really as it was operating. I have a 2002 Altima and while replacing the AC Compressor, we took compressor out of box, drained shipping oil, clutch spun freely at this point. As low current passes through the coil, a magnetic field is created that draws the relay's arm towards the high current circuit. A/C clutch engaged all the time. Without the AC belt the car is PERFECT. Thank you I hope that for now it will hold the freon and not leak out. This is copied from my thread on YotaTech. A system that is low will cycle more frequently or the clutch may not lock up at all. they are all good. Point 3 happens even though I have the clutch fully depressed! guides, Check cars for recalls, common issues & maintenance Share Facebook Twitter ReddIt Linkedin WhatsApp. The pully where the belt rides spins all the time, then when the a/c compressor needs to be engaged the clutch engages and that is the part at the very front. A standard has been developed for the plug of a mechanical relay. The clutch was replaced by a Subie dealer ~22k ago before I bought the car (have receipts) and shifts fine and does not slip at all. 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