Rod bearing knock ? 1932 Chevrolet

Kevin Ray · 2026-04-02T02:31:21Z

Hearing what I think might be Rod knock on start up. Not real noticeable after running a little bit. Kind of hear it come and go when Holding a steady rpm then speeding up slowly. I’m thinking I should drop the pan and plastic gauge the rod bearings to maybe adjust the clearance. Are chances good that the rod bolts will come out without breaking ?. Any advise will be appreciated.

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Steve Dalphonse

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October 22, 2026 8:55 am

I would change the complete rod not just a cap. if you have a spare that has shims remove all the shims to check if it will bind on the crank. Be sure to clean the crank surface really good first. Also you might "mic" the crank to see if it may be undersize. Also a good time to check clearance on all the rods and the mains.

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