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#1
11-13-2008, 10:45 PM
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Louder than normal supercharger whine
Put in a new alternator on the grand prix a few months back and ever since then the supercharger whine has been WAY louder then it used to be, sounds like its comming from near the pully, the s/c has oil, any thoughts? fyi my GP is a 98, nearing 130k miles....
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2006 Chevy Cobalt LS 
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#2
11-14-2008, 08:09 AM
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Re: Louder than normal supercharger whine
Are you sure the noise is from the supercharger? Remove the SC drive belt and see if the noise goes away or changes. Also, you can spin the SC pulley by hand after the belt is removed. If the whining is from the snout then you may have snout bearings acting up.
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'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8 '02 Oldsmobile Alero GL2 - LA1 3400 V6 '99 Buick Regal LS - L36 Series II 3800 V6 '03 Honda CR250R MX - 2 Stroke 250cc '97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold) Timeslip 08/12/06 AF Community Guidelines
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#3
11-14-2008, 05:18 PM
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Re: Louder than normal supercharger whine
yeah i was suspecting it may be the bearing, ill see if it still whines somewhere without the belt around the s/c pully though
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2006 Chevy Cobalt LS
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#4
11-20-2008, 03:19 PM
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Re: Louder than normal supercharger whine
what would be involved in removing the s/c pulley to replace the bearing(s)? i know i need a puller, any picture instructions or special tools needed?
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2006 Chevy Cobalt LS
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#5
11-20-2008, 07:07 PM
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Re: Louder than normal supercharger whine
Did you confirm the noise was from the snout?
All you need is the SC pulley puller to remove the pulley. We have a pulley removal procedure if you use a Pulley Boys brand puller at Tips & Maintenance. Then remove the snout from the main body. Then take the snout to a automotive machine shop to have the old bearings pressed out and new installed. You can get the snout bearings and snout seal from ZZPerformance. The other option is to replace the complete snout with a refurb or new. Note: SC oil must be drained before removal of the snout and after work is done refill with 1 1/2 bottles of GM SC oil.
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'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8 '02 Oldsmobile Alero GL2 - LA1 3400 V6 '99 Buick Regal LS - L36 Series II 3800 V6 '03 Honda CR250R MX - 2 Stroke 250cc '97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold) Timeslip 08/12/06 AF Community Guidelines Last edited by BNaylor; 11-20-2008 at 08:04 PM.
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