I think it is just a difference in terminology, We called cummins wet liners because the entire liner was surrounded by the water jacket and the Detroit didn't. As far as the seal, yes there is a seal, but it is not a problem area as it was with the old cummins. However, I still question if the engine was running 4,000. Especially after the damage he describes sounds exactly what happened to the old engines when they were lugged. I have known engines to run away and self destruct from either a Detroit blower or a turbo passing too much oil, but this was in a no load situation, either between gears or in a shop. Except for 1 60 series which dropped a valve while still in warrranty, I have run nothing but cummins in my over the road trucks for the past 40 years. It's been over 30 years since we had one to pull a liner so I guess there's no need in worrying about it now any more.
