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92 4 runner 3L V6

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Old 06-09-2008, 04:13 PM
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92 4 runner 3L V6

Hey guys, am hoping someone could help me figure out a problem. It seems that every time I turn my A/c on something starts to squeal...I've looke dinto and I think it is the idle pully but was wondering if anyone else has any suggestions. Rather fix it myself than pay the dealership.

Thanks ahead of time
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Old 06-09-2008, 04:14 PM
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part 2

and when I turn the a/c off the squealing stops.
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Old 06-09-2008, 04:20 PM
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sounds like your a/c clutch, does the a/c get cold when you turn it on?
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Old 06-09-2008, 04:24 PM
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yes the a/c works great...have no problems getting nice and cool in the recent 100 F heat wave here
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Old 06-09-2008, 04:37 PM
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try spraying a little wd40 behind the idler pulley at the bottom and see what thay does...
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Old 06-10-2008, 03:09 AM
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Sounds like it could be that the belt doesn't have enough tension.
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Old 06-10-2008, 11:45 AM
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thanks guys...I tried the wd40 but no go and I tightened the idle pulley but still squeals...beginning to think I need to replace the pulley itself...any other ideas?
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Old 06-10-2008, 02:25 PM
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Originally Posted by wcucis View Post
thanks guys...I tried the wd40 but no go and I tightened the idle pulley but still squeals...beginning to think I need to replace the pulley itself...any other ideas?
loosen the pulley and take the belt off, roll it and see if it binds .
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Old 06-10-2008, 03:49 PM
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I had the idler pulley on my 91 just freeze up after squealing like that for a little while. The bearings are probably shot, but it's not that hard or expensive to replace.
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Old 06-10-2008, 04:00 PM
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if it doesn't squeal when the a/c is off, everything else must be working fine, idler and all, since the compressor clutch freewheels.

squealing with the a/c on... hmmm... and adjusting the belt doesn't help...
I'd say the compressor shaft isn't turning freely, or has completely siezed up, or the compressor clutch is bad, or the belt is glazed and is slipping no matter how much tension is on it.


*edit- if the alternator is on a separate belt than the a/c, check that the alternator belt is tight too since turning on the a/c will draw more power from the alternator.

Last edited by abecedarian; 06-10-2008 at 04:02 PM.
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