Rocker Arm Assembly: Description and Operation

^ The intake valve rocker arms and the exhaust valve rocker arms are installed on the respective rocker shafts which are retained by the camshaft caps.
^ 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.