re: Any diesel mechanics here?

Your machinist should know what to do- I didn’t look, but you’re probably looking at a thicker head gasket at a minimum- those should be readily available for that engine.

I’m presuming you brought the head assembled?

Really, you want him to work the head over and magnaflux it.

It drives me nuts when people pull a head off a a 5000 hour or more engine- like to do a short block- and they don’t want to work the head over.

Then, a valve drops a month later and everyone is all mad.