Valve Rocker Arm & Push Rod Installation

Important:  Be sure to keep parts in order. Parts must be reinstalled into the original location and position.

1. Install the valve pushrods.
   Fig 1: Valve Pushrods

   Courtesy of GENERAL MOTORS CORP.

   Important:  Be sure that the arrow on the valve rocker arm support is in the up position.

2. Install the valve rocker arm supports.
   Fig 2: Valve Rocker Arm Supports

   Courtesy of GENERAL MOTORS CORP.
3. Apply prelube GM P/N United States 12345501, GM P/N Canada 992704, or equivalent, to the following valve rocker arm contact surfaces:
   • Valve pushrod socket (1)
   • Roller pivot (2)
   • Valve stem tip (3)
     Fig 3: Valve Rocker Arm Assembly

     Courtesy of GENERAL MOTORS CORP.
4. Install the valve rocker arm assemblies as follows:
   1. 4.1. Finger start the bolt at location (1)
   2. 4.2. Finger start the bolt at location (2)
   3. 4.3. Finger start the bolt at location (3)
   4. 4.4. Finger start the remaining valve rocker arm bolts
      Fig 4: Installing Valve Rocker Arm

      Courtesy of GENERAL MOTORS CORP.
5. Rotate the crankshaft balancer to position the crankshaft balancer alignment mark (1) 57-63 degrees clockwise or counterclockwise from the engine front cover alignment tab (2).

   Important:  Once the valve rocker arm assemblies are installed and properly torqued, no additional valve lash adjustment is required.

Fig 5: Crankshaft Balancer Alignment Mark
Courtesy of GENERAL MOTORS CORP.
6. Tighten the valve rocker arm bolts. Tighten valve rocker arm bolts to 30 N.m (22 Lb ft).