Block Strength

could you take some pic's of the damage?
where did the rod break? did it sieze?
i'd say if you rule out everything else it might be possible.
block failure is unusual, but not unheard of.
anytime a motor comes unglued above idle massive damage is not unusual.

a motor turning 6000 rpm = piston speed 100 strokes per second with a
direction change at both ends of the stroke
valve train speed 1/2 that.
it's really a hard to believe anything survives in that enviroment anyway :toothy10:

please let us know what you find.
sorry about your loss