OK, at fleetwin’s request, I’ll jump in and look. Seriously, I think y’all might be barking up the wrong tree. The water passages in those motors are big enough to throw a screaming cat through. Original post says it was steaming out the water discharge, I suggest you revisit the water pump, looking for exhaust leaks into the pump. And of course the pump housing.
Posting a picture of a problem that I’ve seen.
