- Install the valve lifters to the engine.
- Install the guide plates.
- Install the clamps.
- After installing the clamps, turn the crankshaft by hand 720 degrees, two full turns, in order to ensure the free-movement of the lifters in the guide plates.
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: Replace the lifters when you install a new camshaft. Some engines will have both standard and 0.25 mm (0.010 in) oversize valve lifters. The oversize lifter will have the number 10 etched on the side. The block will be stamped OS on the cast pad adjacent to the lifter bore and on the top rail of the cylinder case above the lifter bore.
| • | Prime the new valve lifters before installation, by working the lifter plunger while submerged in clean kerosene or diesel fuel. |
| • | Coat the lifter roller and the bearings with lubricant GM P/N United States 1052367, GM P/N Canada 992869, or equivalent. |
| • | Install the lifters in their original location. |
Important: Ensure that the straight edge of the guide plates and the clamps face away from the cylinders.
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.
Tighten
Tighten the clamp bolts to 27 N·m (20 lb ft).
Important: If the engine will not turn over by hand, one or more of the lifters may be binding in the guide plates.
