8. CYLINDER HEAD/VALVES MXU 550EXi /MXU500i INSTALLATION Rocker Arm Shaft Apply engine oil to the rocker arms and rocker arm shafts Install the rocker arms, rocker arm shafts and washers. Tighten the rocker arm shaft to the specified torque. Torque: 4.5 kgf-m (45 N-m, 32 lbf-ft) Rock Arm Washer 8-16