This is the radiator drain tap in the bottom of the main radiator. You may need to replace the drain tap washer RE9233 when installing the new radiator drain tap. 1945-1955 Mk VI, Silver Wraith,...

This is the OEM drain tap on the bottom of the radiator. 1956-1965 Silver Cloud I,II,III, S-series, Continental & Phantom V    

The steam valve is a safety device to prevent the overheating of the water running inside the vehicle. Once a certain pressure is reached the valve will open releasing steam and cooling off the...