Strange sound from engine compartment

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Apr 7, 2017 | 02:47 AM

SAMARZAK

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Driver School Candidate

Joined: Feb 2015

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From: CA

Strange sound from engine compartment

Could a worn out bearing of alternator or AC compressor or power steering pump cause that strange
sound ? If so, which one is most likely to wear out first ?

Apr 27, 2017 | 07:26 AM

TrevorTran

Driver

Joined: Jul 2016

Posts: 165

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From: California

It is most likely the drive belt that is worn out. I had the same strange noise so I took it in to the dealership for a diagnosis and they came back with a worn belt.

Apr 27, 2017 | 08:05 AM

GSteg

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From: CA

Well without an audio clip, I don't think anyone can tell you what the noise might possible be. It's a guessing game at this point, since we don't even know what vehicle you drive.

Apr 27, 2017 | 08:41 AM

BDSL

Lexus Test Driver

Joined: Sep 2007

Posts: 1,239

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From: Ontario

Quote:

Originally Posted by SAMARZAK

Could a worn out bearing of alternator or AC compressor or power steering pump cause that strange
sound ? If so, which one is most likely to wear out first ?

Is the sound proportional to engine speed? Or the wheel speed?
If the sound is proportional to only the engine speed, then have someone rev the engine while you use a stethoscope on the engine compartment.