Rocker arm adjustment nuts
Thread Starter
Racer
Joined: Oct 2001
Posts: 317
Likes: 0
From: Gulfport FL
Rocker arm adjustment nuts
The rocker arm adjustment nuts that came with my rocker arms are the type with the hex key set screw in the middle. When using these, what is the proper method to tighten them so they dont back out. Do you just turn them to where the valve is properly adjusted and then screw in the hex set screw, or do you put the adjustment nut just before the correct position and tighten down the set screw, and then set the valve. The second method would provide a tighter fit, but I don't want to damage anything.
Racer
Joined: Dec 1999
Posts: 267
Likes: 0
From: Seattle, WA USA
Re: Rocker arm adjustment nuts (RoyArms)
You set the valves just as you would with regular nuts and then hold the nut in position with a box-end wrench while you tighten the set screw. Didn't these things come with instructions?
Thread Starter
Racer
Joined: Oct 2001
Posts: 317
Likes: 0
From: Gulfport FL
Re: Rocker arm adjustment nuts (soundguy)
nope, no instructions. The thing is, thats what I did the first time. Just hold the nut with box end wrench and tighten set screw. But 3 of them backed off and the rocker arms fell off the pushrod. Took me forever to figure out what it was, and one pushrod broke clear in half. I don't want it to happen again, so I was wondering if tightening the nut after tightening the set screw would help.
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: Rocker arm adjustment nuts (RoyArms)
Do you have flat headed racker arm studs? If your using stock heads I think you have to file the heads flat. If your's are flat, try tightening the hex head and then turn the nut to make sure the hex head is nice and tight.
Melting Slicks
Joined: Oct 2000
Posts: 2,268
Likes: 0
From: Roanoke Virginia
Re: Rocker arm adjustment nuts (Fevre)
Something we noticed when replacing one of my roller rockers and stud, if the studs and/or set screws are new, they don't make quite as good a set. Try some thread-lock. Last weekend I went around and checked my valves again. I dialed in lash, the set the screw, but backed off the lash just a hair. Once the set screw was in place, I "bumped" the outer nut back into place, making a prettty darned tight fit.
