Is this a belt or bearing squealing?
09-21-2014, 09:48 PM
#1
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Is this a belt or bearing squealing?
With the engine cold and I turn on the air, the compresser kicks on their is a loud squeal. Tun it off no squeal. with the temp at 180 no squeal.
09-21-2014, 09:49 PM
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09-21-2014, 10:01 PM
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I'll bet it a loose belt and it's old. Replace it and the other one or two, tighten accordingly. 
Dennis
Dennis
09-21-2014, 10:38 PM
#4
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With the engine off and the ignition off, you should be able to spin the compressor by hand without removing the belt. Try spinning it and see how it feels. If you have difficulty spinning it or the bearing feels rough or gritty, it could be the bearing. Otherwise it is very likely a loose or slipping belt.
One reason that most modern cars have a spring loaded tensioner on the A/C belt is because of the initial load as the A/C kicks on. If the belt is old or glazed, it may not slip (and squeal) during normal start-up and running. However when the A/C kicks in, the load will be enough to cause the belt to slip and squeal. Tighten the belt or even change it to a new one and you'll likely cure the problem.
Good luck... GUSTO
One reason that most modern cars have a spring loaded tensioner on the A/C belt is because of the initial load as the A/C kicks on. If the belt is old or glazed, it may not slip (and squeal) during normal start-up and running. However when the A/C kicks in, the load will be enough to cause the belt to slip and squeal. Tighten the belt or even change it to a new one and you'll likely cure the problem.
Good luck... GUSTO
Last edited by GUSTO14; 09-21-2014 at 10:40 PM.
09-22-2014, 07:58 AM
#5
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The quality of the belt can make a difference. When I installed Vintage Air A/C they had specific recommendations to use a reinforced belt for their compressor. And as above, make sure it is not loose...
09-22-2014, 08:50 AM
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It's the belt, typical and common, especially if it's an older belt. Don't tighten it, replace it, run it for a while (to allow stretch), then re-tighten it. Air cond belts, ESPECIALLY on the early style long (A6) compressors, have to be real tight.
09-22-2014, 10:02 PM
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With the engine off and the ignition off, you should be able to spin the compressor by hand without removing the belt. Try spinning it and see how it feels. If you have difficulty spinning it or the bearing feels rough or gritty, it could be the bearing. Otherwise it is very likely a loose or slipping belt.
One reason that most modern cars have a spring loaded tensioner on the A/C belt is because of the initial load as the A/C kicks on. If the belt is old or glazed, it may not slip (and squeal) during normal start-up and running. However when the A/C kicks in, the load will be enough to cause the belt to slip and squeal. Tighten the belt or even change it to a new one and you'll likely cure the problem.
Good luck... GUSTO
One reason that most modern cars have a spring loaded tensioner on the A/C belt is because of the initial load as the A/C kicks on. If the belt is old or glazed, it may not slip (and squeal) during normal start-up and running. However when the A/C kicks in, the load will be enough to cause the belt to slip and squeal. Tighten the belt or even change it to a new one and you'll likely cure the problem.
Good luck... GUSTO