Thread: 2006 Grand Prix GT: What pulley is this? (Video)

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  1. #1 2006 Grand Prix GT: What pulley is this? (Video) 
    Grand Pricks cameron92's Avatar
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    My car has been making an awful grinding noise at around 2K RPM. I think I may have found the problem, whatever pulley this is, is slipping, I'm pretty sure its the A/C compressor(the one at the bottom). I dont have a belt diagram or a owners manual to confirm. Thanks ahead of time, heres the video, skip to around :20 seconds to get a better view:

    Do you think this would make a grinding sound?
    Last edited by cameron92; 09-24-2013 at 10:27 PM.
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  2. #2 Re: 2006 Grand Prix GT: What pulley is this? (Video) 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    The one at the very very bottom that hardly seems to spin at all is the AC compressor's clutch/pulley.

    The clutch looks like its slowly rotating with the pulley but at like a 1 turn per every few thousand of the a/c's pulley itself.

    Try engaging the ac compressor and see if the noise stops.

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  3. #3 Re: 2006 Grand Prix GT: What pulley is this? (Video) 
    Grand Pricks cameron92's Avatar
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    Quote Originally Posted by Fivefingerdeathpunch View Post
    The one at the very very bottom that hardly seems to spin at all is the AC compressor's clutch/pulley.

    The clutch looks like its slowly rotating with the pulley but at like a 1 turn per every few thousand of the a/c's pulley itself.

    Try engaging the ac compressor and see if the noise stops.
    I have engaged the compressor and it definately seems to quiet down. But it still can be heard sometimes, maybe when it slips?

    Is the clutch supposed to slowly rotate like that?
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  4. #4 Re: 2006 Grand Prix GT: What pulley is this? (Video) 
    GTP Level Member 231FUN's Avatar
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    Look like a/c compressor clutch is starting to go
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  5. #5 Re: 2006 Grand Prix GT: What pulley is this? (Video) 
    GTX Level Member OH4CompG's Avatar
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    Either the clutch is going or the compressor is frozen. No pun intended B-)
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  6. #6 Re: 2006 Grand Prix GT: What pulley is this? (Video) 
    Grand Pricks cameron92's Avatar
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    When I engage the a/c, the clutch engages and spins fine as far as I can see. I dont think its frozen as the a/c still works.

    I can still hear the sound with the a/c on sometimes, not as much though and not as loud.
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  7. #7 Re: 2006 Grand Prix GT: What pulley is this? (Video) 
    Grand Pricks cameron92's Avatar
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    Next Question: How do I fix it?
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  8. #8 Re: 2006 Grand Prix GT: What pulley is this? (Video) 
    I live here. Slick2500's Avatar
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    Either replace the ac compressor clutch, from what I have read its a real huge pain to replace, or get a new compressor, iirc they are ~$170 from Rockauto, or you could try a used one from a junkyard.
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  9. #9 Re: 2006 Grand Prix GT: What pulley is this? (Video) 
    Killa Bee Scottydoggs's Avatar
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    you need a new compressor, you can see the center of the clutch turning little by little in the vid you posted.

    you can try spraying wd 40 or some spray grease in the clutch under the pulley area there little holes you can spray into.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  10. #10 Re: 2006 Grand Prix GT: What pulley is this? (Video) 
    Grand Pricks cameron92's Avatar
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    Quote Originally Posted by Scottydoggs View Post
    you need a new compressor, you can see the center of the clutch turning little by little in the vid you posted.

    you can try spraying wd 40 or some spray grease in the clutch under the pulley area there little holes you can spray into.
    Thanks, I'll give the wd40 a go, hopefully it quiets it down.
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  11. #11 Re: 2006 Grand Prix GT: What pulley is this? (Video) 
    Killa Bee Scottydoggs's Avatar
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    its by no means a permanent fix, but if the sound goes away you know for sure its the compressor.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  12. #12 Re: 2006 Grand Prix GT: What pulley is this? (Video) 
    Grand Pricks cameron92's Avatar
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    Quote Originally Posted by Scottydoggs View Post
    its by no means a permanent fix, but if the sound goes away you know for sure its the compressor.
    Yea, the sound went away. I'm happy for now. I guess I'll have to be on the lookout for a new compressor.
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  13. #13 Re: 2006 Grand Prix GT: What pulley is this? (Video) 
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    When mom and dad's van started doing this I had to replace the ac compressor about 2 months later because it locked up. Dad replaced the battery thinking it was bad but I took the belt off and the van started up fine. New compressor and all is well.
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