dantheman345

I am installing these rockers http://mustangsunlimited.com/itemdy00.asp?T1=CR1174+01

on my afr 165 heads

On my stock heads the were just bolt down rockers. I am wondering if on these new rockers if they need to have each rocker adjusted?
Or if I am saying this wrong, if you have any tips on installing new rockers please let me know.

my77stang

yes, each rocker needs to be adjusted.

with the cam lobe all the way down (make sure its ALL the way down) tighten the rocker nut untill there is no slack and the pushrod is tight but you can still rotate the pushrod with your hand. we'll call it lightly snug. then tighten an additional 1/4 to 1/2 a turn. then lock down the nut with the allen bolt in the center of the rocker arm nut and your done.

LTnone

Adjust them. Twirl the pushrod back and forth in your fingers rapidly (but lightly), and slowly tighten the nut. You'll feel the pushrod stop moving (with just light effort..don't wrench on it). This is called zero lash. Turn the nut an additional 1/2-3/4 turn, and lock it down with the allen head bolt in the center. You need to do this when the valve is all the way closed (the lifter will be as low as it can go). An easy way to do this is to get the #1 cylinder on TDC of the compression stroke (both valves closed), adjust them both, turn the crank 1/4 turn and do the next cylinder in the firing order. 1-3-7-2-6-5-4-8. You just need to look at the lifters with the intake off to see when they're at the lowest part of their cycle, it might take a few rotations to see where the bottommost part is, but you'll get it.