Reply to "Piston damage found...."

George PAdmin.

About those rod nuts.

Inspect the picture below.

The first thought by most is this failure occurred because rod bolt #1 snapped in two!

However, observe there is less thread protruding beyond the end of the nuts of the busted rod (1 & 2) compared to the nuts of the good rod (3 & 4).

The threads in one or both nuts gave way, the bolts pulled out of the nuts, the loose cap hammered or sheared the bolt in half and a moment later this motor came to a stop. There is no evidence of a spun bearing, so it is safe to assume this happened very quickly and the nuts were the source of the failure.

-G

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9/30/1010:16 PM

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