GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1996 🢒 Chevy G Van 🢒 Engine 🢒 Engine Mechanical - 7.4L 🢒 Valve Rocker Arm and Push Rod Replacement

Removal Procedure
  1. Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .

    2. Object Number: 64537 Size: SH
  2. Remove the valve rocker arm bolt.
  3. If the pushrod is the only component to be replaced, back the valve rocker arm bolt off until the valve rocker arm can be swung away from the pushrod.

    4. Pull the pushrod out.

  4. Remove the valve rocker arm with the ball.

    5. Object Number: 64539 Size: SH
  5. Remove the pushrod and the pushrod guide.
  6. Store the removed components in order so that the components can be reassembled in the same location.
  7. Inspect the components for the following conditions:
    8. • Cracking at the bolt shoulder of the valve rocker arm bolts
    • Scored or damaged valve rocker arm or valve rocker arm ball mating surfaces
    • Wear or damage to the valve rocker arm areas that contact with the valve stems and sockets
    • Bent pushrods
    • Roughness or scoring at the pushrod ends

Installation Procedure

    Important: Make sure that the pushrod is properly seated in the valve lifter.


    Object Number: 64539 Size: SH
  1. Install the valve pushrod and the valve pushrod guide. Seat the valve pushrod in the valve lifter.

    2. Object Number: 64537 Size: SH

    Important: When new valve rocker arms and/or balls are installed, coat their bearing surfaces with high viscosity oil with zinc GM P/N 12345501 or equivalent.

  2. Install the valve rocker arm with the ball.
  3. Install the valve rocker arm bolt.

    4. Tighten
    Tighten the bolt to 61 N·m (45 lb ft).

    Notice: 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.

  4. Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .