In an effort to replace the
Valve Stem Oil Seal and valve spring, you should commence by removing the
Rocker Arm and the
Spark Plug. Before the removal of the valve keys, rotate the engine with this aim of ensuring that the
Piston gets into top dead center (TDC) so that the valve can not drop inside the cylinder. Second, install Spark Plug port adapter (J 22794) on the Spark Plug port and use compressed air to hold the valves in position. Remove the valve keys and the valve spring cap, and then the valve spring itself using the valve spring compressor (J 38606) compressed the valve spring. Check for damage on valve spring and change if necessary; remove spring seat/valve stem oil seal. In the process of installation, press the Valve Stem Oil Seal/spring seat on to the valve guide boss with a suitable driver and then install valve spring and valve spring cap then the top of valve stem. Compress the valve spring using the valve spring compressor (J 38606), and then install the valve keys and fix them with grease if it is required. Squeeze the valve spring by removing the valve spring compressor (J 38606) and check if the valve keys are placed correctly. Eventually, let off the pressure from the air and pull out the Spark Plug port adapter (J 22794) and reinstall the value Rocker Arm and the said Spark Plug.