Removal Procedure
- Remove the cylinder head. Refer to Cylinder Head Replacement .
- Remove the clamp.
- Remove the plates.
- Remove the valve lifters.
- Inspect each of the following components:
| • | Place the valve lifters in an organizer rack. |
| • | The valve lifters must be installed in the same bores from which they were removed. |
| • | Inspect the valve lifter body for scuffing and scoring. Replace if necessary. |
| • | Inspect the roller for looseness and excessive play. |
| • | Check for missing or broken needle bearings. Replace if necessary. |
| • | Inspect the roller surface for pits and roughness. If present, the mating camshaft lobe should also be checked. If the lobe is pitted or rough, replace the camshaft and valve lifters. |
Important
Some engines will have both standard and 0.010 inch oversize
valve lifters. The oversize valve lifter will have a "10" etched
on the side. The block will be stamped "O.S." on the cast pad
adjacent to the valve lifter bore and on the top rail of the cylinder case
above the valve lifter bore.
Installation Procedure
- Connect the valve lifters to the engine.
- Install the plates.
- Install the clamps.
- Install the cylinder head. Refer to Cylinder Head Replacement .
- Install the valve rocker arm covers. Refer to Valve Rocker Arm Cover Replacement .
- Refill the engine coolant with the proper type and quantity. Refer to Cooling and Radiator.
- Change the oil filter and oil.
Notice: Prime the new valve lifters before installation. The valve lifters may be damaged if the valve lifters are dry when the engine is started.
Important:
• Prime the new valve lifters before installation by working the
valve lifter plunger while submerged in clean engine oil. • Coat the valve lifter roller and bearings with lubricant GM P/N
1052365 or equivalent. • The valve lifters must be installed in their original locations.
Important: The straight edge of the guide plates and clamps face away from the cylinder.
Tighten
Tighten the clamp bolt to 26 N·m (18 lb ft).
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.
Important: After all the clamps are installed, turn the crankshaft by hand two full revolutions, to ensure free movement of the valve lifters in the plate. If the engine will not turn over by hand, one or more of the valve lifters may be binding in the plate.
