Mechanics

CAR IS MAKING SQUEALING NOISE

1998 Pontiac Bonneville • 240,000 miles

My car is making a squealing noise every time I drive it or start it
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Ray9191
January 17, 2012.



First thing that comes to mind is the serpentine belt, have you checked this?

PROTECH1980
Jan 17, 2012.
Can't really hear it over a computer but serpentine belts are a common cause of a squeal. Check it for proper tightness, (with the engine not running of course). Also try dribbling a little water on the smooth back side while the engine is running and the noise is occurring. If the noise changes, pulley misalignment or a worn belt are the likely suspects along with a spring-loaded tensioner that is rusted tight in the released position.

Don't use any type of belt dressing on serpentine belts. Even in the rare event it quiets the noise for a little while, dirt will stick to it making the noise even worse.

Caradiodoc
Jan 17, 2012.
Yeah I have check the belt it looks good I thought it might be the pulley

Tiny
Ray9191
Jan 17, 2012.
Take the belt off, hand spin all pulleys to try pinpoint noise, Also with belt removed, start car (just for a few seconds) make sure noise is gone, then you have it narrowed done to belt or belt driven accessory.

PROTECH1980
Jan 17, 2012.