I've shot a piston out of my engine before. The rod broke sometime while I was driving and caused the engine to lose quite a bit of power, but it was still drivable. I kept driving it so that I could pull into my work parking lot. I guess while I was driving it, the broken piston shot out of the engine. After that, I wasn't able to get it started.
I wouldn't blame the brother in law for this like you seem to be doing. He just happened to be caught sitting at the wheel when the final piece snapped.
The only way he could've damaged a perfectly good engine by force starting it was if the engine was flooded with water or another liquid (fuel or oil). That can cause the rod to break as well. However, if it was already experiencing symptoms of a weakened engine, but still running, I doubt that this was the case.
|