I participate on a board for 6.0 Powerstroke Diesels, and one issue that is starting to creep in as the engines get up over 300K is roller lifter failure. Needle bearings get out, engine is trashed, needs full rebuild. So I thought that one of the very first engines to use roller lifters (cam followers, I don't know what the correct DD name is) is of course our Detroit two stroke. What is the word on failures of roller lifters on our engine? Do they get lifed and changed out after so many hours/miles? I honestly don't think I've every heard someone mention a roller lifter failure.
Brian