[Grady Clay]

Good discussion.

Dave, sorry for your misfortune.

Something not mentioned here are operating conditions (other than over-rev). Detonation can be an issue if the piston is already ‘fragile’ in this area. Even a slight ‘hydraulic lock’ only once can damage the pin or piston. Of course temperature is always an issue.

Another clue is finding pistons with cracks at the pin oil hole. That tells me there is some issue with the piston.

Best,
Grady