GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2004 🢒 Grand Prix 🢒 Engine 🢒 Engine Mechanical - 3.8L 🢒 Valve Lifter and Guide Cleaning and Inspection

    Object Number: 178485 Size: SH
  1. Keep the valve lifters in order so they can be installed in their original position.

    2. Important: When new valve lifters are installed, coat the valve lifters with camshaft and lifter prelube GM P/N United States 12345501, GM P/N Canada 992704 or the equivalent.

  2. Inspect the following areas of the valve lifters:
    3. • The retaining clip (1)
    • The push rod socket for wear (2)
    • The valve lifter body for wear and scuffing (3)
    • The valve lifter bore for wear
    • The valve lifter roller assembly for wear (4)
    • The valve lifter roller pin for damage (5)
    • The oil hole for plugging (6)
  3. Inspect the valve lifter guides for cracks or damage.