I'm having the hardest time with this damn rattling. I have a comp roller cam, retro rollers and roller rockers all from 440 source. Engine is fresh, barely broken in. I followed the sequence in setting lash. 1/4 turn past zero lash when lifter is on the backside of the circle base of the cam lobe. The tech Dept from 440 source thought maybe it was a bad set of lifters not pumping up so we had comp warranty a new set. I have the exact same symptoms. At cold startup, no noise. Once the engine is completely hot, after about 20 minutes of idling, the rattle becomes very prominent. Sounds like a diesel from the videos I've been taking for comparison. I've added a total of one full turn past zero lash, that helped very minimally but still too loud. Sounds like a bad exhaust leak when driving. 12 psi of oil at idle using 10w-30. Any advise on next steps?