GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 Express - AWD 🢒 Engine 🢒 Engine Mechanical - 4.3L 🢒 Valve Rocker Arm and Push Rod Replacement

Removal Procedure
  1. Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Left Side or Valve Rocker Arm Cover Replacement - Right Side .

    2. Object Number: 480526 Size: SH

    Important: Mark, sort, and organize all the components for assembly.

  2. Remove the valve rocker arms.

    3. Object Number: 480527 Size: SH
  3. Remove the valve rocker arm supports.

    4. Object Number: 480529 Size: SH
  4. Remove the valve pushrods.
  5. Clean and inspect the valve rocker arm and the valve pushrod. Refer to Valve Rocker Arm and Push Rod Cleaning and Inspection .

Installation Procedure

    Object Number: 480529 Size: SH

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

  1. Install the valve pushrods.

    2. Object Number: 480578 Size: SH

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

  2. Install the valve rocker arm supports.

    3. Object Number: 480551 Size: SH
  3. Apply prelube to the following valve rocker arm contact surfaces:
    4. • Valve pushrod socket (1)
    • Roller pivot (2)
    • Valve stem tip (3)
  4. Refer to Adhesives, Fluids, Lubricants, and Sealers for the correct part number.

    5. Object Number: 480580 Size: SH
  5. Install the valve rocker arm assemblies as follows:
    6. 5.1. Finger start the bolt at location (1)
    5.2. Finger start the bolt at location (2)
    5.3. Finger start the bolt at location (3)
    5.4. Finger start the remaining valve rocker arm bolts

    Object Number: 334551 Size: SH
  6. 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).

    7. Notice: Refer to Fastener Notice in the Preface section.

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

  7. Tighten the valve rocker arm bolts.

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

  8. Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Left Side or Valve Rocker Arm Cover Replacement - Right Side .