Re: New engine in a e37
Soo.. which engine is there now?
Anyhow overheating issues are not usually 'engine specific' in the regard that most problems will lie with the RW pump, intake strainer, low FW reservoir levels, FWC pump, and often a clogged mixing elbow that restricts cooling water flow.
If mechanics have investigated and not been able to find the problem, either they're not very good mechanics or it's an oddball issue and/or and oddball engine.
So we need more details and information on what's been checked and confirmed to be OK.
btw.. welcome to the forum. I've moved your post to the Diesel Engine forum, a more appropriate place for it.
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
1984 Fast/Nicholson 345 "FastForward"