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Used pistons swap...B21F 200 1979

Don,

Bad wrist-pin confirmation ?

I just put in new rod bearings and "almost new" (!) main bearings. That quietened down the engine very much.

But I still had a "tock-tocktock" somewhere, a knock pattern that I read was indicative of wrist-pin problems.

I listened to the engine with a stethoscope and cylinder no. 2 sounded to be the culprit. When I pulled the spark plug wire to it, all knock disappeared. I repeated the procedure a few times. The stethoscope also told me clearly that the bearings were quiet. The knock definitely came from the upper portion of the block.

Thanks for your support!






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