Valve Rocker Arm and 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: Installing 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: Installing Valve Rocker Arm Supports

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

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

      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).
   CAUTION: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

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

6. Tighten the valve rocker arm bolts.

   Tighten 

   Tighten valve rocker arm bolts to 30 N.m (22 lb ft).

   Fig 5: Rotating Crankshaft Balancer To Position Crankshaft Balancer Alignment Mark

   Courtesy of GENERAL MOTORS CORP.