Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Off My Rocker

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Rob 85K5, Mar 24, 2000.

  1. Rob 85K5

    Rob 85K5 1/2 ton status GMOTM Winner

    Joined:
    Feb 17, 2000
    Posts:
    1,487
    Likes Received:
    0
    Location:
    Pensacola, Florida
    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>
     
  2. AZK5

    AZK5 1/2 ton status

    Joined:
    Feb 22, 2000
    Posts:
    448
    Likes Received:
    0
    Location:
    Chandler, AZ
    Are you using the locking nut with the set screw at the top or the factory type nut?
    CB
     
  3. ken

    ken 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,244
    Likes Received:
    0
    Location:
    Anaheim, CA
    Just a thought...are the stud threads OK? That is, the threads that the rocker arm nut uses.

    ken
     
  4. OLDSTEEL

    OLDSTEEL 1/2 ton status

    Joined:
    Mar 11, 2000
    Posts:
    107
    Likes Received:
    0
    Location:
    SANDIEGO CA
    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!
     
  5. CBLAZER81

    CBLAZER81 1/2 ton status

    Joined:
    Mar 3, 2000
    Posts:
    281
    Likes Received:
    0
    Location:
    Milliken,COLORADO
    I had a similar problem .It turned out to be a flat lobe on the camshaft.Just a thought.
     

Share This Page