Thread: 99 Grand Prix 3.8 non supercharge squealing noise under hood

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  1. #1 99 Grand Prix 3.8 non supercharge squealing noise under hood 
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    I'm getting squealing noise, can not find the source. Appears to be stronger on the passenger side, replace belt an noise continues. It starts after 5 of driving and sometimes goes away with stop and go. I'm using stethoscope, but no luck, need advise...
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  2. #2 Re: 99 Grand Prix 3.8 non supercharge squealing noise under hood 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    When it does make the noise, see if you can't quick spray various pullies with WD-40 to try and find the one making the noise.

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  3. #3 Re: 99 Grand Prix 3.8 non supercharge squealing noise under hood 
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    Quote Originally Posted by Fivefingerdeathpunch View Post
    When it does make the noise, see if you can't quick spray various pullies with WD-40 to try and find the one making the noise.
    I did it - no luck; the noise continued...
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  4. #4 Re: 99 Grand Prix 3.8 non supercharge squealing noise under hood 
    Moderator dsmuts's Avatar
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    No noise with belts off?
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  5. #5 Re: 99 Grand Prix 3.8 non supercharge squealing noise under hood 
    GT Level Member titanfan12's Avatar
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    it might be the ac compressor, it makes a squealing noise if its hung up
    99 Silver Gtp here --------------------> http://www.grandprixforums.net/my-99...gtp-80323.html
    slp headers ,straight pipe, intriuge suspension, cai, ported tb, performance roller lifters, and bulit trans. 04+ seats in and le spoiler on
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  6. #6 Re: 99 Grand Prix 3.8 non supercharge squealing noise under hood 
    GTX Level Member Bills1997GTP's Avatar
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    I know when my power steering pump took a dump the pulley snapped and was still spinning inside causing a squeal it was a loud squeal too, I couldn't figure out what it was since I didn't have power steering anyways until the belt and pulley came off together on i95 ... Good times
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  7. #7 Re: 99 Grand Prix 3.8 non supercharge squealing noise under hood 
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    Quote Originally Posted by Bills1997GTP View Post
    I know when my power steering pump took a dump the pulley snapped and was still spinning inside causing a squeal it was a loud squeal too, I couldn't figure out what it was since I didn't have power steering anyways until the belt and pulley came off together on i95 ... Good times
    Took belt off and noise continues. Is a dry noise like something is not lubricated, not metal to metal noise. My mechanic friend believes that noise is coming between engine and transmission; does any one know if it this vehicle has oil pump drive?
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  8. #8 Re: 99 Grand Prix 3.8 non supercharge squealing noise under hood 
    Moderator dsmuts's Avatar
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    No oil pump drive.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  9. #9 Re: 99 Grand Prix 3.8 non supercharge squealing noise under hood 
    Killa Bee Scottydoggs's Avatar
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    Quote Originally Posted by Josejimenez View Post
    Took belt off and noise continues. Is a dry noise like something is not lubricated, not metal to metal noise. My mechanic friend believes that noise is coming between engine and transmission; does any one know if it this vehicle has oil pump drive?
    the trans pump is on the driver side and would be heard between the engine and tranny. they tend to whine when they go bad or have a clogged filter.

    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: 99 Grand Prix 3.8 non supercharge squealing noise under hood 
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    Quote Originally Posted by Scottydoggs View Post
    the trans pump is on the driver side and would be heard between the engine and tranny. they tend to whine when they go bad or have a clogged filter.
    Is there another name for tran oil pump?
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  11. #11 Re: 99 Grand Prix 3.8 non supercharge squealing noise under hood 
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    Sorry transfer pump?
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  12. #12 Re: 99 Grand Prix 3.8 non supercharge squealing noise under hood 
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    Correction, another name for trans pump?
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