thank you again i thought about it alot and couldnt see how it might but i felt safer asking so far on this engine ive replaced the head water pump timing chain and related hard wear on compression testing i average 160 lbs per cylinder odemiter says almost 300.00 on it i traded for the truck there wqaas alot done wrong to it.. . so when i do this by feel how much valve lash should i have is any??? oh a correction on my oil weight its 5 w -30 not 50 anain much thx