GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1975  Size: SH
  1. Remove the cylinder head. Refer to Cylinder Head Replacement .

  2. Object Number: 3682  Size: SH
  3. Remove the bolts that secure the lifter anti-rotation brackets.
  4. Remove the anti-rotation brackets.

  5. Object Number: 3684  Size: SH
  6. Remove the valve lifters.
  7. Important: Inspect the valve lifter and camshaft lobe for excessive wear. Replace if necessary.

    For more information about camshaft bearing replacement, refer to Engine Mechanical.

Installation Procedure

    Notice: If the valve lifters and anti-rotation brackets are not installed properly, the valve lifters, the anti-rotation brackets, and the engine could be damaged.

    Important: When installing new valve lifters, coat the lifters with an approved engine oil supplement.


    Object Number: 3684  Size: SH
  1. Install the valve lifters into the lifter bores.
  2. • Align the flat sides (top) of the lifters with the flat sides of the anti-rotation brackets.
    • When properly aligned, the flat side of each lifter is aligned parallel to the anti-rotation bracket.
    • The roller at the bottom of each lifter is aligned parallel to the camshaft lobe.

    Object Number: 3683  Size: SH
  3. Install the anti-rotation brackets on the valve lifters.

  4. Object Number: 3682  Size: SH
  5. Install the screws that retain the anti-rotation brackets.
  6. Tighten
    Tighten the anti-rotation bracket screws to 11 N·m (97 lb in). Refer to

    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.

    in General Information.


    Object Number: 1975  Size: SH
  7. Install the cylinder head. Refer to Cylinder Head Replacement .