3.0 LITER V6 DIESEL. AIR CHARGE COOLER. Filler hose. A tube with an opening, which can connect the radiator, Coolant reservoir or engine, where engine Coolant can be poured into for a vehicle’s Cooling system. Auxiliary Radiator. Flexible Hose that is part of the engine Cooling system. InterCooler Hose. Primary Radiator. Charge Air Cooler. Engine Neck. Inlet. InterCooler. Pipe -. Radiator.