I recall the rear seal on the 2.0 was called a "hydrodynamic seal" Not really a seal at all. High base pressure can push oil past it. I did an inframe in the field shortly after they came out in the late 80"s. It has free standing wet liners that are shimmed at the bottom to get the correct liner projection. I have one customer running the engine with over 15,000 HOURS! T30D. This is the exception, not the rule. EPS will not even offer this engine anymore the last time I asked.
Steve