Have an intermittent noise in my 327 but only after the engine is up to operating temp. It kinda sounds like a squeak or loose fan belt and it is at idle up through the RPM range The engine has about 1000 miles on it and runs fine. I blocked the PVC valve but that did not stop it. I pulled the fan belt and that did not help either. Just looking for any clues as to where this noise could be coming from.