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Old October 9th, 2016, 12:16 AM
WE7X WE7X is offline
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Location: Issaquah, Washington
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Default Re: Nocking at high RPMs

I cannot be sure, from the pictures, but it looks like that bearing has spun in the connecting rod. I don't see any trace of the tabs that should have fit into the notches in the connecting rod and the rod cap. It also looks like there are scrape marks on the outer surface of the bearing shell.
I would strongly suggest pulling the others, to have something to compare. BE SURE to mark the caps, so they go back on the same connecting rod, and in the same orientation, when you finally assemble it.
Rod J
Issaquah, WA
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