Thread: Weird sound coming from belts

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  1. #1 Weird sound coming from belts 
    GTX Level Member crbquist's Avatar
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    Over the passed few weeks every now and then my motor will make this weird "chittering" noise which sounds like its coming from the pulleys/belts. It seems to do it when it is wet outside which is really weird. At times it will sound fine, then the sound will come back and its pretty noticeable. As the rpms go up, the noise becomes more rapid. The car runs/drives fine either way; just curious as to what might be causing it. Any thoughts?
    01 Silvermist GTP - E85 - Cam - Heads - Phenolic IC - Polished Gen V - Stock trans...
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  2. #2 Re: Weird sound coming from belts 
    The Blue One blueguy's Avatar
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    Pulley's...check them...specifically the alternator, and idlers. Also, you can yank off the blower belt and run it to see if the sound is there...and if it is still there...then you've knocked out the entire supercharger accessory system.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
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  3. #3 Re: Weird sound coming from belts 
    I AM PEWPIN! rynoman03's Avatar
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    Probably an idler pulley or the alternator.
    1999 GTPHP Tuned, Ported SC/TB, 42#'s, SSAC's, ZZP Modded 1.9's/LS6 Springs/Manley's, TransGo Shift Kit, Poly Uppers, KYB GR2's/Springtech's. - 231k and traded it in. - Gone
    2000 GTP: XP, P&P'd Heads, N*\Lq4 MAF, GenV, 42#'s, PRJ Rails\FPR, Racetronix, TEP w/ 3.29 Gears, 300m, 7/8" chain, SSAC's. - Collecting dust in my garage.
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  4. #4 Re: Weird sound coming from belts 
    GTX Level Member crbquist's Avatar
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    I don't think it is the alternator pulley because when I listen closely with the hood up it sounds like its coming from a pulley below the supercharger. I hope its just an idler pulley.
    01 Silvermist GTP - E85 - Cam - Heads - Phenolic IC - Polished Gen V - Stock trans...
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  5. #5 Re: Weird sound coming from belts 
    GTX Level Member 98GTPCALGARY's Avatar
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    pull your belt off and check all of your pullies, spin them, try and wiggle them around, feel if the bearings are going.
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  6. #6 Re: Weird sound coming from belts 
    SE Level Member KYWings's Avatar
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    I have a very similar problem. Were you able to identify the noise?
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  7. #7 Re: Weird sound coming from belts 
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    I have a 99 GTP thts superchargered and it does the same things, i have a bearing in the supercharger, and the iderler pulley thts getting bad, about how much would it cost to get the supercharger fixed? or can i buy a rebuild kit tht i can do myself?
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  8. #8 Re: Weird sound coming from belts 
    Donating Users Vegas_Matt's Avatar
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    Lol I had a noise and it was my s/c, mechanic says the case is cracked, local boosted guys say it's internal bearings. Search my posts I have a vid up of the noise
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