Patent ID: 7111651

Claim:
A vehicle engine coolant changing system comprising: an old coolant container having an inlet opening and an outlet opening, a new coolant container having an inlet opening and an outlet opening, an adapter disposed in an engine radiator service opening and having a passage therethrough, the adapter has a tapered configuration to engage in service openings of various sizes, an old solution conduit interconnecting an engine interior and said inlet opening of the old coolant container for transfer of old coolant from the engine interior to the old coolant container, a new conduit interconnecting the new coolant container and the adapter to pass new coolant from the new coolant container into the engine by atmospheric pressure, means to provide a partial vacuum in the old coolant container to draw old coolant from the engine interior into the old coolant container via a conduit, means to apply atmospheric pressure to new coolant in the new coolant container to urge said coolant into the engine, and a single control operable to provide rapid and efficient changes in flow patterns via conduits and valves of the system.