Tools Required

J 3049-A Valve Lifter Remover

1. Remove the intake manifold. Refer to Intake Manifold Replacement .
2. Remove the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
3. Remove the valve lifter guide retainer bolts and retainer.




Important: Mark, sort. or organize the valve lifters and guides for installation in their original location.

4. Remove the valve lifter guides.
5. Remove the valve lifters.



6. Some valve lifters may be stuck in their bore due to gum or varnish deposits. These lifters can be removed using J 3049-A
7. Clean and inspect the valve lifters. Refer to Valve Lifters and Guides Cleaning and Inspection in Engine Mechanical 8.1 L - Unit Repair.

Important: If a new camshaft is installed, replace all the valve lifters.

1. Coat the valve lifter rollers withlubricant GM U.S. P/N 12345501, Canada P/N 992704, or equivalent.

Important: If reusing the valve lifters, install the lifters in their original location. The valve lifter guide retainer must contact all of the valve lifter guides. If the valve lifter guide retainer is bent, the valve lifter guide retainer must be replaced.

2. Install the valve lifters.
3. Install the valve lifter guides over the flats on the valve lifters, making sure the rollers of the valve lifters are properly aligned with the camshaft lobes.



4. Install the valve lifter guide retainer.

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 valve lifter guide retainer bolts.

Tighten
Tighten the valve lifter guide retainer bolt to 25 N·m (18 lb ft).

6. Install the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
7. Install the intake manifold. Refer to Intake Manifold Replacement .