VALVE ROCKER ARM ASSEMBLY
The valve rocker arm assembly is shown in Fig. 28.
Removal
1. Remove the air cleaner.
2. Disconnect the spark plug wires at the spark plugs by grasping the moulded cap only. Remove the wires from the bracket on the valve rocker arm cover(s) and position the wires out of the way.
3. Remove the valve rocker arm cover(s).
4. Remove the valve rocker arm stud nut, fulcrum seat and rocker arm.
Cleaning
Clean all the parts thoroughly. Make sure all oil passages are open.
Inspection
Inspect the pad at the valve end of the rocker arm for indications of scuffing or abnormal wear. If the pad is grooved, replace the rocker arm. Do not attempt to true this surface by grinding.
On ball stud rocker arms, check the rocker arm and fulcrum seat for excessive wear, cracks, nicks or burrs. Check the rocker arm stud and nut for stripped or broken threads.
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Installation
1. Apply Lubriplate to the top of the valve stem and at the push rod guide in the cylinder head.
2. Install the valve rocker arm, fulcrum seat and stud nut. Adjust the valve clearance following the procedure given on page 21.
3. Replace rocker cover(s).
PUSH RODS
Removal and refitting
This procedure is described under, cylinder head— removal ; and refitting. To remove the rear push rod(s) it is necessary to remove the cylinder head(s).
Cleaning
Clean the push rods in a suitable solvent. Blow out the oil passage in the push rods with compressed air.
Inspection
Check the ends of the push rods for nicks, grooves, roughness or excessive wear.
The push rods can be visually checked for straightness while they are installed in the engine by rotating them
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