Shop equipment Easy operation and hook-up with universal step adapters and quick couplers. Exchanges coolant from the engine block, heater core, water pump, hoses and radiator. "Engine off" operation and reverse flushing for the most complete exchange. MCX-2 adds the features of system pressure test and "hot car" radiator cap pressure relief. Extra pumping power for 1-3 minute coolant exchange! The fastest service times in the industry.