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Old 06-22-2018, 11:39 AM   #8
cederholm
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Join Date: Jun 2017
Location: Brooklyn NYC
Posts: 180
Default Re: Odd vibration noise

Bob, I'm not laughing at anything!

I rebuilt a 53 stovebolt for an old Chevy (bad, I know) dropped it in and it had a knock. Pulled it again, not a small job with a cast iron trans behind that heavy six. Tore it down, found no issues, but it back together and dropped it back in. Still had a knock - wanted to cry. Spoke to EVERYONE I could find, in person and online. Dropped the oil pan a few dozen times. Pulled the motor again thinking it was the flexplate, swore the whole time, put the motor back, still had a knock. Invented new swear words and years are now passing. Convinced the noise was at the rear of the motor I ignored the front.

...it was a lose harmonic dampener. The fan belt would more the dampener fore and aft causing it to thump against the crank and sending the sound reward.


All crazy thoughts welcome!!!!

Thanks,
Carl
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