Start your work by disconnecting the battery negative cable before you begin to service all parts of the valve system. Before adding compressed air into the service cylinder, take off the valve
Rocker Arm cover from the Cylinder Head and turn the
Crankshaft with both valves shut. Keep the cylinder in bottom position before starting valve service to stop engine rotation. Separate the valve Rocker Arm system from the Cylinder Head then uninstall push rod
Spark Plugs. Put the Spark Plug port adapter (J 22794) in the Spark Plug port then blow compressed air through the cylinder to shut valves before gently hitting the valve spring retainer to free the keepers. After installing the valve spring compressor (J 5892-C) onto the Cylinder Head connect the valve Rocker Arm bolt to secure it during spring compression. With the compressor pressurized the valve spring assembly becomes compressed so valve keepers can be pulled off without releasing the air. Relax the compressed spring pressure afterward take out the compressor unit then the valve spring retainer and spring from engine head finally extract the valve stem seal from its valve guide. After positioning the new valve stem oil seal on the valve guide put in the valve spring retainer then the spring. The valve spring compressor tool j 5892-c helps place valve springs and keepers. During installation always apply compressed air and grease to retain the keepers securely. Once finished use the compressor to release the tension then take off the equipment and escape the compressed air. Reconnect the battery before putting back all components including spark plugs and valve rocker assembly pieces.