The Valve Stem Oil Seal service starts by taking off the
Rocker Arm and
Spark Plug first. Turn the engine until its
Piston reaches top dead center to stop the valve from dropping into the cylinder before taking out the valve keys. Attach the Spark Plug port adapter part number j 22794 into the spark opening and blow compressed air into the valves to hold them in position. Put the valve spring compressor (J 38606) to lessen valve spring pressure before you take off valve keys, valve spring cap, and valve spring. Check valve spring condition and replace it when needed before you remove the Valve Stem Oil Seal and spring seat. Fit the Valve Stem Oil Seal/spring seat over the valve guide boss with appropriate tools while pressurizing the valve spring compressor (J 38606). Afterward, place the valve spring and valve spring cap into position and depress the valve spring again using the spring compressor. Push the valve keys into place and apply grease as required before removing the compressor unit so the valves can drop when releasing the spring while positioning the keys correctly. After releasing compressed air use Spark Plug port adapter j22794 to take off the parts and put back the Rocker Arm with Spark Plug.