This is the large O ring on the inlet pipe that sits on the left hand side of the water pump volute casing, that sits on the front of the engine. Original part # was CK955, UR3776, these have been...

This is the larger diameter o ring that sits between the coolant pipes and the thermostat housing on all cars from 1987 onwards (VIN 20001). 1981-1998  Silver Spirit, Silver Spur, Mulsanne,...