Rocker Arm Assembly: Service and Repair

ROCKER ARMS

REMOVAL

NOTE: This procedure is for in-vehicle service with camshafts installed.

1. Disconnect negative battery cable.
2. Remove cylinder head cover.
3. Remove spark plugs.
4. Rotate engine until the camshaft lobe, on the follower being removed, is positioned on its base circle (heel). Also, the piston should be a minimum of 6.3 mm (0.25 in.) below TDC position.

CAUTION: If cam follower assemblies are to be reused, always mark position for reassembly in their original positions.





5. Using Special Tools 821 5-A and 8436 slowly depress valve assembly until rocker arm can be removed (Fig. 28).
6. Repeat removal procedure for each rocker arm.

INSPECTION





Inspect the rocker arm for wear or damage (Fig. 29). Replace as necessary.

INSTALLATION
1. Lubricate rocker arm with clean engine oil.
2. Using Special Tools 8215-A and 8436 slowly depress valve assembly until rocker arm can be installed on the hydraulic lifter and valve stem (Fig. 28).
3. Repeat installation procedure for each rocker arm.
4. Install spark plugs.
5. Install cylinder head cover.
6. Connect negative battery cable.