8. CYLINDER HEAD/VALVES MXU 550EXi /MXU500i Install and tighten the two nuts under the cylinder head to the specified torque. Torque: 1 kgf-m (10 N-m) Bolts Install the water stop collar, gasket and water joint. Install and tighten the two bolts to the specified torque. Torque: 1.2 kgf-m (12 N-m) Water Joint/Gasket/Water Stop Collar Install gasket and pair reed valve. Install and tighten the five bolts and two nut securely. Pair Reed Valve Cover/Holder Gasket 8-22