The procedure is to remove the starter motor, install the EN 46106, remove the camshafts and rocker's arms, remove the spark plug from the applicable cylinder, install the J 39313, connect the J 39313 to a compressed air source, install the EN 46110, tighten the EN 46110 valve spring compressor nut, remove the valve keepers, loosen the EN 46110 valve spring compressor nut, remove the valve spring retainer, remove the valve spring and remove the valve stem seal.