Rocker Arm Assembly: Description and Operation

5. VALVE ROCKER ASSEMBLY
- The rocker arm has a special surface treatment to improve the resistance to wear which would result from its movement on the rocker shaft.
- The valve side of the rocker arm is provided with a value rocker adjust screw & nut. Turning of this screw can adjust valve clearance.
- The exhaust valve rocker arms have a "Y"- letter design, and each arm operates two exhaust valves.





- The rocker shaft has an oil passage in it.