Ten push rods, all with "cracks" in one engine at the same time? It does not fit the normal manner in which parts fail in an engine.
Can you post some closeup pics? It isn't difficult to post pics on this site.
As many on this site can attest for me on this, I am old, fat, forgetful, short-fused, homely, inconsiderate of other's feelings, and stupid, yet I can still post pics on this site.
Carl
