Service the valve guide seal using tdc knowledge to block the valve inside the cylinder from dropping by ensuring the
Piston reaches its top position. You can detach the Spark Plug using Spark Plug port adapter j22794 then clean any material found in the recess and do not remove the Spark Plug when the engine reaches high temperature. Put the j22794 spark port adapter into the Spark Plug space and let compressed air keep the valves steady. After removing the Rocker Arm, put the j38606 valve spring compressor on the valve spring and decrease its pressure to take out the valve locks, valve cap, and valve spring. Check the valve spring condition and replace it if defected prior to removing the spring seal and valve stem oil seal. After positioning the j22794 on the valve guide boss apply a suitable driver to correctly set the valve stem oil seal/spring seat. Then install valve spring and cap. Put the valve in its compressed position using the j38606 tool while adding valve locks onto their holders. Reinsert the valve spring afterward. Position the valve locks correctly after ensuring they are seated properly then put the Rocker Arm in place. You should end by reducing air pressure and taking out the j22794 tool before adding the Spark Plug into position.