well i have a 6.0 on voodoo came in for no start found old oil filter base stuck in bottom of housing.
after it finally started found missing on 3 cylinders. also noticed alot of oil on cold side cac tube. so i did a crankcase pressure test 11 in called bert and ernie and the told me to remove turbo and rerun crank case pressure test like thats real easy on an 03 so i did it and it dropped to 8-9 inches so next is a manual compression test found low cylinder 290 high cylinder 360 so tore the engine down cant find any thing wrong three cylinders had light valve contact so i filled the heads with diesel and all the valves hold next i remove the valves and none are bent protrusion is good and taper is at outerlimits of spec but still in spec. only thing i have found is one lifter out of the front 8 was missing the clip and it fell apart only after i taken it out of engine. cross hatches still present no mods at all air filter weighs 4 oz more than new one im scrathing my head
what am i over looking i know it has to be something stupid my only thinking is that the lifter clip came out and rolled down camshaft and made the valves hit i would really like to know why compression is way off and any other thaughts thanx steve