HELP! whining / squealing noise

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Feb 28, 2016 | 08:32 PM

elcapetan

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HELP! whining / squealing noise

I'm experiencing a whining/squealing noise from the engine. It only happens after driving the vehicle around for 5 -10 minutes. I only hear it at idle, sometimes it goes away and can only be heard immediately after revving the engine. I though maybe it was a belt but it sounds like it is coming from the rear of the engine.

LS1 engine

Last edited by elcapetan; Feb 28, 2016 at 09:03 PM.

Feb 28, 2016 | 09:58 PM

Russ K

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From: Regina, Sask

Remove the oil fill cap, if the noise goes away, then it looks like the PCV fresh air hose needs to be hooked up to the 90* elbow on the throttle body.

Russ Kemp

Mar 5, 2016 | 05:49 PM

joecar

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From: So.Cal.

HELP! whining / squealing noise

Also check for loose/broken exhaust manifold/header bolts (this lets exhaust to blow past the gasket, causing a squeal sometimes, seems related to throttle, and unrelated to rpm; at other times it causes a ticking sound).