I forgot, is this the E300? Do those things have piston cooling jets? Seems like 1995 was not a turbo year. If a cooling jet fell off, I wonder how much oil pressure would escape from the hole?
Another possibility (on any engine) is loss of an oil galley plug. Happened to my Dad's 1973 Ford P/U, he left it idling for half an hour and when he returned it was making an awful clatter. He paid $$ hundreds in labor to replace a $3 part. Ford was not interested in a policy adjustment for an engine defect on a six year old truck. Dad hasn't bought a Ford since, and never will. I was amazed the engine still seemed to run normally after that. Mitch.
