[Hib Halverson]

Make sure you install that with Red Loctite and if you can access any of the others, remove them and Loctite them, too.

I've never heard of one of those coming out and, man, with that missing, I'll bet the oil pressure was low.

Interesting that something 5.25-in in diameter would fit though the drain plug hole, but then, I guess I don't remember how large it was.