General description Designed to allow the removal of valve springs and valve stem & oil seals with the cylinder head in place. This tool is suitable for universal use on SOHC and DOHC engines. Technical specifications Includes a 22mm compressed air adaptor Airline adaptor has 18mm/14mm (male) threaded end to fit spark plug hole Usage Combustion chamber is pressurised via the supplied spark plug air line adaptor which holds the valve in place during the valve spring compression operation Fast set up time due to the twin rail pivot system Single handed operation