Squeaking Noise In Engine Compartment

[0356kid]

Have an 08C2S, 45K miles. On start up and at idle, there is a squeaking noise in the engine compartment. Could this possibly be an alternator bearing or water pump going bad? Appreciate insight & thanks in advance!

[jchapura]

Could be. Could also be a pulley.

Safely use a mechanic's stethoscope to try to narrow down where the squeak is coming from. If you don't have a stethoscope, I've used a long small diameter metal rod... Just be careful when the engine is running.

[GHG]

My 2007 C2S water pump died at 65k. Can't recall a squeak but worth the stethoscope treatment.

[Loren]

Polyrib belt, or any one of several pulleys.

You need to remove the belt and isolate the noise.

[0356kid]

Thanks gentlemen! Will remove the belt later next week and go from there. Will report back when I find out what it is and, hopefully not something too serious!

Edited December 31, 2016 by 0356kid
Wording error

[Loren]

Don't run the car too long without the polyrib belt - a few seconds should be all that is needed.

[timbo]

is it a continuous squeaking? belt off will get you started in the right direction, mine sometimes squeaks when cold, and I had a Boxster once which squeaked when throttle applied which turned out to be a loose spark plug.

 

[0356kid]

 Belt off produced nothing unusual. In talking to a service shop he said his sometimes squeaks when he initially starts his car up. I noticed it when it was rather cold out but shortly after the car warmed up, all was gone. Think I'll just keep an eye (or ear in this case) out to see if it continues. Thanks for all the feedback.