You need to remove the rocker's arm, disconnect the spark plug wire at the spark plug, loosen the spark plug 1 or 2 turns, brush or air blast away any dirt or debris from around the spark plug, remove the spark plug, install the J 22794, attach an air hose to the J 22794, apply compressed air to the J 22794 to hold the valves, compress the valve spring, remove the valve stem keys, release the valve spring tension, remove the J 38606, the valve spring cap, the valve spring, and the
Valve Stem Oil Seal and shim.