C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Rasping and Squeaking Engine Noise

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Old Aug 22, 2014 | 01:03 AM
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Default Rasping and Squeaking Engine Noise

While taking my car for a test drive after replacing my main and rod bearings and installing a HV oil pump because of low pressure, I noticed a rapid squeaking noise. It seemed to be more noticeable at lower speeds. I thought it was just the serpentine belt. When I brought it back and ran it in the garage to find the squeak, I noticed a rasping noise. Fairly rapid, about 5 times per second (if I remember right), it seemed to be coming from the distributor when I listened from the passenger side. When I moved to the driver's side, it seemed to be coming about from the middle of the head on that side. Can anyone venture a guess what it could be? Here's a video to help:
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Old Aug 22, 2014 | 12:50 PM
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Anyone?
Today I plan to run it until it makes the noise, then turn it off, take off the serpentine belt, and restart it to see if it's one of the accessories making the noise.
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Old Aug 22, 2014 | 01:51 PM
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That is the best plan of action for now...You did a lot of work so far. I hope it's nothing serious....
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Old Aug 22, 2014 | 01:59 PM
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Originally Posted by charliet615
That is the best plan of action for now...You did a lot of work so far. I hope it's nothing serious....
Thanks Charlie!
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