Having problems with your Cars & Trucks ?

I have a 2005 Mercury Sable. When the A/C is on and you're outside the car you can hear a rattling/grinding type sound under the hood. It's not loud and probably wouldn't be that noticable to anybody who wasn't familiar with the way the car sounds. A/C seems to be working fine. Any ideas?

Posted / edited by AnonymousUser on : 12-11-2018

Answers :

In most cases the noise is the bearing for the ac compressor clutch. Once the clutch bearing fails, the serpentine belt will be lost.
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