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Number 1 piston rotated 80 degrees right, connecting rod not connecting, both push rods look like an S and not pushing anything, crack from number 1 piston to the water passage in the top front of the head/block.
Mine just developed a tiny little crack from the right rear freeze plug hole. No problem other than it kept leaking coolant. No physical damage or cause that I can detect.....friggin motor was perfect except for the crack.
Casting defect or structural anomoly is all I can figure.....a fluke.