adjustment of roller rockers

lightmalibu79

Amateur Racer
Jan 3, 2004
176
0
0
tennessee
profile.myspace.com
ive added a set of roller rocker arm to my 406. of course they came in a white box with no instructions. what is the adjustment, is it zero lash or zero lash and add a 1/2 turn..... any help wood be appreciated
 

bowtie81

Moderator
Mar 28, 2008
5,008
0
36
sarnia, ontario canada
All depends whether you have solid or hydraulic. Hydraulic i go 1/4 past zero lash.
 

bracketchev1221

Dragway Regular
Apr 22, 2009
1,111
1
0
Mountville Pa
I am assuming a hydraulic cam? But you adjust them just like any other rocker. 1/2 turn preload is safe. With polylocks it is easier to do with the engine off. I pick the rocker to adjust and move the pushrod up and down until all the slack is out of it. Then put a dot on the poly lock at 12 oclock. Tighten poly lock to about 5 oclock position. Tighten set screw, and then try to tighten poly lock almost to 6 oclock position. Now it has almost 1/2 turn preload and set screw is jammed.
 

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