The factory piston isn't forged, its cast which makes it more
brittle than a forged piston. As badly bent as some of those valves are , the damage to the pistons could be extensive.... I'd also think about checking the rod bearings after a smack like that.
Quote:
Originally Posted by ricola
I've notched pistons for valve clearence. There is no issue if you smooth the edges. I assume this is a street engine. The small mark left in a factory forged piston will not effect your engine. Even with an occasional spirited romp.