Final torque (or how much of a turn) on rocker arm bolts once I have zero lash?

[misterW]

I switched my lower intake on a 99 3.0 L. Now assembling things back up, I'm putting the pushrods back in and tightening down the rocker arm bolts. Once I tighten them down to zero lash, my manual says to tighten each down to 24 foot lbs, regardless of cam position. This seems like it would tighten the valves different amounts depending on each one's position on the cam??? I have seen a number of videos on this that say to do the final tightening by turning each bolt 3/4 turn. This seems like it would make more sense because each valve would then be tightened the same amount. I'm just not sure if 3/4 turn is appropriate for this engine or not. What is the best way to do this?

 

[franklin2]

If your rocker arms look like the picture below and use bolts to install in the heads, they are not adjustable. You bolt them down till they stop and torque to the required value.

 

[franklin2]

If you want to pretend you are adjusting them you can, just to check them. After zero lash count the number of turns till it bottoms out. 1/2 to 3/4 turn is good. 1 turn is ok. 1.5 turns you are getting iffy. and less than 1/2 turn is iffy. If you are in the iffy zone, you have to get longer or shorter pushrods or if it's not bad,, you can sometimes put shims under the pedestal.

 

[pjtoledo]

the lifter takes up the lash. the top cup of the lifter is pushed down by spring pressure to "adjust" lash.
as the oil pressure fills the lifter the spring pressure says "stop here",, that's your lash.
works great unless the pushrods are too short.
factory spec is from .085" to .185" gap with the lifter fully collapsed.

 

[Guanfy]

24ft lbs sounds right. That's what in the FSM for the '94 anyway.