Knock and smoke

It had steam b4 carnage. He shut it down overnight and started it again and then it went south. Could have had a cylinder full of water and broke the piston pin boss when it came up on compression. Water dont compress and either head gaskets blowing,rods bending or pistons breaking.

Well I we all don't know about that one. There could have been both. I don't see how the bottom of the piston skirt could break from water in a cylinder. Usually a Rod will bend or break but not the bottom of the piston..... We all are guessing here since none of us were there. It could be anything at this point.