Serpentine Scream - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 10-22-2003, 06:19 PM   #1
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Default Serpentine Scream

Hi everyone! Hope you're all well and prospering!

98 Bonneville SE (not supercharged)

Engine seemed abnorrnally loud in the serpentine area, so I replaced the (presumably 5 yr old) accessory belt. Didn't help.

It'* a high pitched whine that raises in pitch when the car
accelerates and decreases during deceleration.

According to the manual, this belt wraps around 6 elements:

Power Steering
Generator
Air Conditioning
Crank
Coolant Pump
Idler

Someone mentioned to me that this could be bearings going out. If so,
they're going slow because this noise has been around for over a year.
Could something need greased?

Any thoughts on which element is likely to be causing this and,
if replacement is necessary, what kind of cost is reasonable, i.e.,
how will I know I'm being taken?

Thanks!
puppet
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Old 10-22-2003, 06:30 PM   #2
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Lternator bearings? Chronic problem in our vehicles. The guru'* will be he shortly to verify. You should be able to narrow it down using a piece os hose as a stethescope (read that in a manual somewhere)

BTW, glad to see another 98 SE out there!
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Old 10-23-2003, 04:07 PM   #3
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Default barely bearing the bearings

Thanks, MOS

What kind of money we talking about to replace alternator bearings -

parts + labor?

Thanks again!

puppet
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Old 10-23-2003, 11:30 PM   #4
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I have the same problem after replacing that belt (what an easy job that was) :(

I thought it might be the AC, but if it'* the alternator, then that'* actually good news. Thanks.

Fred
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Old 10-23-2003, 11:38 PM   #5
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what about the tenioner?
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Old 10-24-2003, 01:24 AM   #6
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Default Re: barely bearing the bearings

Quote:
Originally Posted by fingerpuppet
Thanks, MOS

What kind of money we talking about to replace alternator bearings -

parts + labor?

Thanks again!

puppet
To ensure that it'* the alternator bearing.. ( cause I had that probem before too ) I squirted some dura lube( you can use any lubricant thats thin and not WD-40 i.e. maybe try 3 in 1 or something ) on the back bearing of the alternator.. start the car and see if it quiets down.. if not.. then try squirtin some on the belt tensioner bearing on the wheel and see if that quiets down.. it'* not a fix.. but if it quiets down.. then you know its either of those that'* giving you the squeak
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Old 10-24-2003, 02:51 AM   #7
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I was thinking of a plan like that, but without going outside I wasn't sure it was feasable. Unfortunately, I don't think you can replace just the bearing on the Alt. ANd so far I've gotten lucky and haven't had a problem, so I don't know on parts & labor.
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Old 10-24-2003, 09:16 AM   #8
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Default barely bearing the bearings

Thanks everyone!
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Old 11-03-2003, 01:19 PM   #9
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Default Follow up

Stethoscope indicates excessive noise coming from power steering pump.
No place to lubricate it, but I did add some power steering fluid since it
was down about half ! duh!

Seems to have helped a bit.

Thanks again!
puppet
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Old 11-03-2003, 01:58 PM   #10
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It'* always the simple answer, huh?
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