the likely hood of the oil galley plug blowing out is very rare, i dont think i have ever heard of that happening, i am confident that the cam plug is responsible for your oil leak. when you call Cummins, even though you have part #'s, have your ESN handy because that's how we look eveything up with quickserve. I did double check those numbers for the oring & plug, and they are right.
Wes
Wes