Center main blowout

[Frank Miller]

I helped a friend pull his motor to see why it was rapping. We knew there was a main bolt that had fallen out but that's it. The motor was still on the hoist when we pulled the pan and that is as far as we got. Half the cap was in the pan with a broken bolt. When we tried to loosen the other bolt it broke off the same way. I have never seen anything like this but my experience is limited. I think the bolts never got fully torqued to the cap due to bottoming out. That is just a thought.
It's out of warranty and don't ask who put it together. Mistakes happen, he's not doing them any more and he's a good guy.