Good guess Del but in most cases they don't run that close normally , the clue was in my first post " has it ingested water "
Even though this may not be the issue with this engine the symptom of nibbled skirt is the same .......
Bent con rod ?? If it was stolen and had the death ragged out of it , but in most cases the rev limiter will stop that sort of damage .
So a bent rod will not reach top dead it will be short of reaching deck height , but on the downward stroke the shortened rod pulls the piston further down the bore and in some cases clipping the skirt on the crank counter weight .
It may not be this but you have to rule all of the causes
Audis8tui have you turned engine over with heads off to see if that piston in question falls short of the deck height .
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