Install retaining ring (1).
Install the rocker shaft assembly. Refer to
Disassembly and Assembly, "Rocker Shaft and
Pushrod - Install".
Rocker Shaft and Pushrod - Install
SMCS Code: 1102-012; 1208-012
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened
Install eight pushrods (4).
Ensure that the pushrods are installed in the
original location and that the pushrods are seated
in the valve lifters correctly.
Install a new oil seal in the oil supply hole in the cylinder
Put rocker shaft assembly (3) in position on the cylinder
head. Make sure that the connection for the oil supply
is installed correctly into the oil seal.
Ensure that the adjustment screws are properly
seated in the ends of pushrods (4).
It may be necessary to loosen the adjustment
screws on each rocker arm. This will help prevent
a bent valve or a bent pushrod during the
installation of the rocker shaft.
Lubricate three nuts (1) and bolt (2) with clean engine
Install three nuts (1) and bolt (2).
Alternately tighten the nuts and the bolt. Start from the
center and work toward the outside. Tighten the nuts
and bolt on an aluminum bracket to a torque of 40 Nm
(30 lb-ft). Tighten the nuts and bolt on a cast iron or a
steel bracket to a torque of 75 Nm (55 lb-ft).
Adjust the inlet valve lash to 0.20 mm (.008 inch) and
adjust the exhaust valve lash to 0.45 mm (.018 inch).
Refer to the Testing and Adjusting, "Air Inlet and
Exhaust System" topic for more information on adjusting
the valve lash.
Install the valve mechanism cover. Refer to
Disassembly and Assembly, "Valve Mechanism Cover
- Remove and Install".