Problem with lash closing up

[ss3011]

Originally Posted by nhramnl

From what you state, you have a one cylinder problem. Has to be assumed that all 16 valves are adjusted using the same technique, so torquing of the adjuster nuts is probably not the problem. I would ask myself some questions, at this point. Are both intake and exhaust valve lash closing up, or just one of them? Does lash return to its original cold setting when the engine cools, or has lash now decreased by .003, both cold and hot? Is there ANYTHING different about the pieces used on that one cylinder (e.g. new/different rocker stand, new bolts securing the rocker stand to the head, repair to the cylinder head threads into which the rocker stand is screwed, previous cracked head repair in that immediate area, new/different valves on that cylinder, new/different lifter pair on that cylinder, valve seats replaced on that cylinder, and on and on). Good luck.

No new parts were installed this year , we lashed the valves hot at .015 and cylinder 4 closed up to .012 after we ran a few pulls . That is what concerns us . Now the engine is dead cold and cylinder 4 has .015 lash on both intake and exhaust . All other cylinders are .018 . Thanks for your comments .