Off My Rocker

[Rob 85K5]

I have been having a problem with the rocker arm on one of the exhaust valves loosening enough to not work at all. It has happened twice now. I put a new rocker arm, ball, and nut on last night and it is still happening. I have checked the pushrod and it isn' bent. A friend said maybe the valve spring is weak and that is causing the problem. Anyone else have an idea? These are aluminum heads with self centering rocker arms.

I am using the factory style nut, not the poly locks with the set screws. If the valve spring is the problem, I don't see how that would help.

Does anyone make a tall centerbolt valve cover?

Rob 85K5

<font color=orange>Bleedin' Chevy Orange</font color=orange>

 

[AZK5]

Are you using the locking nut with the set screw at the top or the factory type nut?
CB

 

[ken]

Just a thought...are the stud threads OK? That is, the threads that the rocker arm nut uses.

ken

 

[OLDSTEEL]

You should look at the studd it could be the problem. I would all so put the self-locking nuts on. You may find the tall valve covers in P.A.W. or Summit.

74 K5

Leave it like you found it, or better!

 

[CBLAZER81]

I had a similar problem .It turned out to be a flat lobe on the camshaft.Just a thought.