I think i broke rear main bearing

You don’t think that was my first repair like that do you?

I’ve been doing this a LONG time and I’ve never EVER had one fail. So if you or your buddy is failing them, take a look in the mirror.

It’s essentially the same repair for spark plug holes. Zero failures there too.

I don’t need luck.
I think it happened when I tried to torque it. This time I just did it by hand. It looks like it was machined both sides before it was put together.