[AnthonyG]

Frank nailed it in post #15, broken piston, no broken rings. Makes more sense as Frank said. Once piston removed could see crack between top 2 ring grooves. Piston skirts & top of one side dragging on cyl, w piston out can see aluminum marks in cyl. Feels fine to touch. Can’t feel any cyl damage, aluminum against iron the iron won. 100% sure cyl is good & light hone will remove marks. See pics of piston, couldn’t get a shot of inside cyl that showed anything.