strange squeaking noise as the engine runs idle?

1999 CADILLAC DEVILLE

159,600 MILES

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My car is making a strange squeaking noise as the engine runs idle. The noise is coming from somewhere near the power steering fluid and/or top left corner around the engine. It has been having some problems with running hot and leaking coolant.

Dec 7, 2012 at 11:15 AM

SQM

CAR REPAIR CONTRIBUTOR
6,383 POSTS

Hello,

The noise you are hearing is likely from the tensioner or the idler pulley of the serpentine belt.
It can also be generated is the belt is slipping due to being glazed over.
If the belt does not have proper tension, it can also make the noise.
Stretched belt due to age will become noisy as well.
Also, if you get coolant on the belt, it will make chirping noise.

Here is a helpful article:

https://www.2carpros.com/articles/car-squeaking-noise

I have attached the belt diagram and replacement as well as noise diagnostics below.

Please let me know of any questions.
Thank you.

Images (Click to enlarge)

Oct 1, 2021 at 8:51 AM

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