sound from the serpentine belt area - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 09-21-2007, 09:27 AM   #1
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Default sound from the serpentine belt area

I have a chht chht chhht sound coming from the belt area that speeds up as I speed up..It'* loud.

I will get a recording of the sound when I get home tonight, but can anyone tell me how to stop it? Can I spray WD40 over all the moving parts?
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Old 09-21-2007, 09:37 AM   #2
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Do not use any WD-40...


Take the belt off, and spin all the pulleys by hand. Listen for any noise and feel for any play in the bearings. That should get you started, and should turn up some results.
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Old 09-21-2007, 09:56 AM   #3
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Do you hear the sound when parked? Does it follow the engine rpm or your speed?
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Old 09-21-2007, 09:54 PM   #4
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Yes, Bill.. I hear it when parked... It'* got a rhythmic chirp or brushing sound.. It follows the rpms meaning it gets faster. the noise changes, sometimes not as loud. But always present
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Old 09-22-2007, 06:18 AM   #5
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check to see if is a tensioner pulley bearing is going out. i was hearing a sound like that from the same area, and last monday on my way home i heard a loud squeal, and check engine light came on. the bearing in the tensioner pulley on the accessory belt went out and the plastic pulley melted, and flew off, shredding my accessory belt leaving me with no power steering or waterpump. just something that my be the problem. you don;t want to end up with a broken car if you can avoid it.
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Old 09-22-2007, 10:11 AM   #6
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Can you explain where the tensioner pulley is please. Picture?
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Old 09-22-2007, 12:18 PM   #7
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Name:  tensioner.jpg
Views: 5
Size:  14.5 KB

Right below the alternator:

Name:  L36PCV.jpg
Views: 5
Size:  102.9 KB
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Old 09-22-2007, 10:32 PM   #8
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Hi . im having a very close problem , but in my case the noise start after 15/20 minutes later when the engine heat-up , i change the belt , doing that project a did a small crack in the housing of the spring , i went to the yard and got the part (tension pulley) i would appreciate any response as any link and/or the steps to replace the tension pulley.

Thank You.







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Old 09-23-2007, 11:34 AM   #9
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..

assuming that you are just replacing the pulley, and not the entire tensioner assembly.... it should just be a left-hand thread on the bolt.

You put a socket on it, and turn to the LEFT to release the tension and slip the belt off. Then turn the bolt to the RIGHT to loosen the pulley. I believe that there is some sort of washer behind the pulley that you do not want to lose..
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Old 09-23-2007, 12:09 PM   #10
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I changed the belt a long time ago and ended up removing the motor mount to get a new one on. .....There has got to be a way to get a belt on without removing the motor mount...
Right??

Is there a techinfo on the belt removal and replacement?
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