Figure 5-8. Measuring Valve Rocker Arm Support
Check that the OD of the valve rocker arm support shaft is at least 0.4685 inch (1 1.90 mm).
m. Check that the ID of the valve rocker arm does not exceed 0.4764 inch (12.1 mm).
Check for bending of the push rods. Maximum push rod distortion is 0.0118 inch (0.3 mm).
Inspect and thoroughly clean the gasket and O-ring areas of cylinder head and crankcase.
Replace any valves (refer to 2 and 3, Figure 5-2) that show warpage, burning, or other damage.
Replace any valves that are seriously scratched, scuffed, pitted, or cracked.
Replace any valves that allow a valve recess greater than 0.043 inch (1.1 mm).
Replace any valve with a stem diameter less than 0.2126 inch (5.40 mm).
Remove slight scratches or scuff marks with crocus cloth.
Press out valve guide using valve stem seal fitting tool.
Insert new valve stem seal into cylinder head by pressing in with valve stem seal fitting tool.
Replace valve spring (refer to 4, Figure 5-2) if any of the following are true.
(1) Valve spring is damaged.
(2) Valve spring free length is greater than 1.043 inches (26.5 mm).
(3) Valve spring inclination is greater than 0.039 inch (1.0 mm).
Replace valve rocker arm support shaft (refer to 7, Figure 5-2) if shaft diameter is less than 0.4685
Replace rocker arm (refer to 13, Figure 5-2) if ID exceeds 0.4764 inch (12.1 mm).
Replace push rods if distortion exceeds 0.0118 inch (0.3 mm).
Place new cylinder head gasket (refer to 5, Figure 5-3) and push rod O-ring (refer to 6, Figure 5-3)
onto cylinder block.
Install cylinder head (refer to 4, Figure 5-3) onto four studs protruding from cylinder block.
Secure cylinder head (refer to 4, Figure 5-3) to cylinder block using four nuts (refer to 1 and 3,
Figure 5-3) with four washers (refer to 2, Figure 5-3)
d. Tighten nuts using torque wrench to 20-23 ft-lb (280-320 kg-cm).
Install valve spring washer (refer to 9, Figure 5-2)