Rocker Arms and Shafts

DISASSEMBLE
1. Disassemble rocker arms and shafts by first removing bolts from bearing caps.

NOTE: Identify each component for reinstallation in the original position.





Fig. 106

2. Remove bearing caps, waved washers, springs, and rocker arms (Fig. 106).
3. Clean and inspect all components for damage and wear. Refer to procedures.

ASSEMBLE





Fig. 103

The rocker arm shaft is hollow and is used as a lubrication oil duct. The rocker arm shaft on the inlet side has a 3 mm (0.188 inch) diameter oil passage hole from the cylinder head. The exhaust side does not have this oil passage (Fig. 103).





Fig. 104





Fig. 105

1. Align the camshaft bearing caps with arrows (depending on cylinder bank) directed as shown in (Fig. 104) and in numerical order. Identify number one bearing cap; number one and number four caps are similar (Fin 105)
2. Install rocker shafts so that bearing cap number one with end notches positioned as shown in (Fig. 105) and the machined portion of the rocker shaft is facing down.
3. Install attaching bolts in the number one bearing cap to retain assembly.





Fig. 107

4. Install the rocker arms, bearing caps, waved washers, and springs. The waved washers are located between the bearing caps and rocker arms (Fig. 107). Position the flat area of the washer to the rocker arm side as shown in (Fig. 107). The springs are the same length except for one (Fig. 106). This spring is shorter in length and is identified with white paint marks at both ends.
5. Insert bolts in each bearing cap to retain assembly.