72. Valve Rocker Arm and Push Rod Installation

Valve Rocker Arm and Push Rod Installation





Important: Be sure to keep parts in order. Parts must be put back from where they were removed.

1. Apply sealer GM P/N United States 12346004, GM P/N Canada 10953480, or equivalent to the valve rocker arm stud-to-cylinder head threads.

Notice: Refer to Fastener Notice in Service Precautions.

2. Install the push rod guides and valve rocker arm studs onto the cylinder head.
- Tighten the valve rocker arm studs to 50 Nm (37 lb ft).





Important: The 8.1 L engine uses different length intake and exhaust valve push rods.
The exhaust valve push rods (2) are longer than the intake valve push rods (1).

3. Install the valve push rods.





4. Coat the valve rocker arm and valve rocker arm ball bearing surfaces with prelude GM P/N United States 1052367, GM P/N Canada 992869, or equivalent.
5. Install the valve rocker arms, the valve rocker arm balls and the valve rocker arm nuts.
- Tighten the valve rocker arm nuts slowly, to 25 Nm (19 lb ft), while guiding the tips of the rocker arms over the tips of the valves.