Rocker Arm Shaft

The rocker arm shafts are hollow and are used as lubrication oil ducts. The rocker arm and shaft assembly on the right side of the engine has an oil passage hole from the cylinder head located at the third rocker shaft support pedestal. The rocker arm and shaft assembly on the left side of the engine has an oil passage hole from the cylinder head located at the second rocker shaft support pedestal.

NOTE: The intake and exhaust rocker arms are different. They should be identified before disassembling the assembly.