GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the cylinder head. Refer to Cylinder Head Replacement .

  2. Object Number: 409301  Size: SH
  3. Remove the bolts that secure the lifter guides.

  4. Object Number: 3683  Size: SH

    Important: Ensure that the lifter guides are identified so they can be installed in their original location and orientation.

  5. Remove the lifter guides.

  6. Object Number: 3684  Size: SH
  7. Remove the valve lifters from the lifter bore.
  8. Inspect the valve lifter for the following conditions:
  9. • Lifter wear
    • Lifter scuffing
    • Loose roller shaft
  10. Inspect the valve lifter bore in the engine block for wear and scuffing.
  11. Inspect the roller for freedom of movement.
  12. Inspect the roller surface for flat spots and pitting.
  13. Inspect the valve lifters and the valve lifter guide assemblies. Refer to Valve Lifters and Guides Cleaning and Inspection in Engine Unit Repair Manual.
  14. If a valve lifter requires replacement inspect the camshaft. Refer to Camshaft and Bearings Cleaning and Inspection in Engine Unit Repair Manual.

Installation Procedure


    Object Number: 3684  Size: SH

    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 engine assembly prelube (GM P/N 1052367) or equivalent.

  1. Install the valve lifters in the lifter bores.
  2. • Align the flat sides (top) of the lifters with the flat sides of the lifter guides.
    • When properly aligned, the flat side of each lifter is aligned parallel to the lifter guide.
    • The roller at the bottom of each lifter is aligned parallel to the camshaft lobe.

    Object Number: 182890  Size: SH
  3. Install the lifter guides on the valve lifters.

  4. Object Number: 3682  Size: SH

    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.

  5. Install the screws that retain the lifter guides.
  6. Tighten
    Tighten the lifter guide bolts to 11 N·m (97 lb in).

  7. Install the cylinder head. Refer to Cylinder Head Replacement .