valve marks in pistons ADVICE NEEDED PLEASE READ

[hustonr123]

I dont know if every lifter can go bad at once atleast 6 of the 8 valves hit the pistons

[arb]

I dont know if every lifter can go bad at once atleast 6 of the 8 valves hit the pistons

This is why I thought it was timing... What did you torque your cam sprocket bolt to after you set your timing ?

Also, I did not see if your head guy tested the compression force of the springs, nor if he took apart / cleaned the lifters. I could see oil contamination / deterioration affecting 3/4 of the hydro lifters all at once (you are sure this is a hydro head ??) There is usually more than one way to fix something :-)

[hustonr123]

i didn't torque the cam bolt but it was plenty tight  i am sure its hydraulic head wish wasn't at this point 

[arb]

i didn't torque the cam bolt but it was plenty tight  i am sure its hydraulic head wish wasn't at this point 

Well, unless you were very lucky, your valve timing is not correct. You really should follow the timing procedure in the Bently on setting the timing - it not only sets the injection pump timing but the valve timing too.

[hustonr123]

i have all the correct timing tools  what I ment was i didn't use a torque wrench to tighten cam bolt

[RabbitJockey]

where are you in pa

[Runt]

You cannot correctly set the timing belt and tension without loosening the cam pulley.  I'd be surprised if the timing would be out enough to smack valves, but I've never done it, so I don't know how bad it would be.  To install the belt, the crank, and IP pulleys are kept still, and the cam is locked, but the cam pulley must be allowed to rotate with the belt.  once the belt is lined up and tensioned, then the cam pulley is final torqued.
Might I suggest that when you reinstall, you use a little bit of plasticene or better yet plastigage, on the pistons.  Install the head, do the measured torque BUT NOT the angle torques, install timing belt properly, and rotate the engine through at least two full rotations.  Remove the timing belt and the head, and check to see how close the valves are to the pistons.  Plastigage makes it easy, but you can get a pretty good idea with plasticene.
FWIW, I'd get a replacement set of lifters in there just for peace of mind.
Good luck.

[hustonr123]

i loosen the cam bolt every time i just don't torque it to 30 ft pds or whatever the spec is

[hustonr123]

McConnellsburg fulton county

[truckinwagen]

i loosen the cam bolt every time i just don't torque it to 30 ft pds or whatever the spec is

cam timing could have slipped, without a toque wrench it is hard to say if it was tight enough or not.

[theman53]

I usually go past bentley and torque to 45ft/lbs.

[truckinwagen]

me too, but without a torque wrench it may have only been 25-30 ft-lbs...

[Rabbit on Roids]

arent you supposed to torque the cam to 52 ft lbs?

[hustonr123]

Ill know in about 20 min if it slipped or not  ill post back in a few

[truckinwagen]

arent you supposed to torque the cam to 52 ft lbs?

spec is 33 ft lbs if I remember right