Studying this closely I think I may have to provide more clearance between the #5 cap rear and the "deflector" on the crank. The black squiggle is where I could machine .057" off. It may do the trick. I really don't think there is any issue with the seal itself. I am leaning towards a severe oil/pressure buildup that NO seal can handle. I'm also starting to think the windage tray should be left out to provide more room between the rear counterweight and the cap. J.Rob