Hey guys thanks for viewing first off, my 6.0 has been kicking my ***. Long story short same mechanics been working on my truck for the past few weeks. Two times now he has had to replace injector o-rings on the same side of the head within a week apart and just last night i'm driving normal when i let off the gas and hear tapping loud enough to hear in the cab not thinking its my truck, i touch back on the gas and it stops. let off it does it again look back and i'm pouring grey smoke, so i shut it down. Sure enough it hyrdolocks. No Dtc new codes that i havent already had . What now? I highly doubt i take it to the same mechanic. possibly doing my self.