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Ok I have a belt squeal that is god awful. It mostly comes from when I turn on the AC. So I check the belt on the alternator and it is making good contact with the pulley so then I look at the AC pulley. The AC pulley isn't spinning at all and the belt is just going around it, but right now it isn't squealing. I turn the AC on and the AC pulley starts spinning and then the squeal starts again. My question is, does the AC pulley turn when the AC is off because I would think it does, and if it does, is my belt just not making good contact with the AC pulley or could the compressor be seized up until I turn it on. Someone please help.

 
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1 of two things, either the belt isn's making good contact like u said, or it needs to be tensioned. I know when I lost my PS tension it squeeled like a ****ing pig raper.

 
Rep Power: 374

haha so thats why mine squeels sometimes

 
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lol... i had mine squeeeeeeekin for a while .. took it to my mechanic and he said that my pully's were glossed... i took a wire brush to both of them and then replaced the belt.... its quiet now..

replace the belt and clean the pully's , use some brillow

 
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replace the belt or adjust the tension or you can something temporary like putting some belt dressing....you can try also armor all on the belt and pulleys

 
Rep Power: 323

waht you are seeing is the clutch in the ac pulley working. the pulley does not turn the ac unless you turn it on inside the car. try tightening the belt. if that doesn't work then clean the pullies and replace the belts.

 
Rep Power: 374

Good idea, i wouldve never though of taking a wire brush to it though

 
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Does the AC turn on / blow cold air? I had a problem where my compressor actually locked up (older american car though) and caused the belt to squeel... untill it finally broke

 
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yeah AC works it just starts to squeal because it looks like the pully is spinning and the belt just must not be making good contact with it. I will try to pull everything off and then tighten it up really good. Oh by the way where is the tensioner for that belt around the AC pulley?

 
Rep Power: 0

^^^ there isnt one.. its on the alternator.. u have to losen it to tighten that belt cause its the same one