2.4 LITER. A seal that prevents oil from leaking out, or contaminants from enteRing the Engine Coolant Inlet Housing. Engine Water Pump O-Ring. Gasket for Engine Coolant Water Inlet. O-Ring. Pipe that is part of the Engine Cooling system. Coolant Flange O -. Coolant Gasket. Coolant Pipe O -. Pump O -. seal.