Ok I'm having a no start hot issue. It's an early 04 6.0 changed HPOP about 8 months ago along with ipr and icp. Truck ran great about a week ago it started having hot no start issues so I figured it may have been the standpipes so I tore into it changed both sides and when I got to passenger side when I took the valve cover off stuck to the inside of the cover was half of an oring. I would say the oring is about one inch in diameter. Any clue where this piece of oring could have come from? Could it be from the injector cups on the log oil rail? And I'm still having the no start issue after the standpipes where installed!