GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2004 🢒 Bonneville 🢒 Engine 🢒 Engine Mechanical - 4.6L 🢒 Valve Lifter Replacement - Left Side

Removal Procedure
  1. Remove the left valve rocker arms. Refer to Valve Rocker Arm Replacement - Left Side .

    2. Object Number: 522867 Size: SH
  2. Remove the stationary hydraulic lash adjusters (SHLA) from the bores.
  3. Clean and inspect the valve lifters. Refer to Valve Lifters Cleaning and Inspection .

Installation Procedure

    Object Number: 240801 Size: SH

    Important: Do not stroke/cycle the SHLA plunger without oil in the lower pressure chamber.

  1. Fill the SHLA with clean engine oil GM P/N 12378006, or equivalent. Take precautions to prevent scratching the pivot sphere area (1) of the SHLA.

    2. Object Number: 522867 Size: SH
  2. Install the new SHLAs into the bores.
  3. Install the left valve rocker arms. Refer to Valve Rocker Arm Replacement - Left Side .