Cat® Engine Oil Cooler Radiator System are separate, smaller radiator to an engine's main radiator, which maintains an oil supply at a consistent, optimal temperature. Its purpose is to cool the oil passing through the coils, thus improving the engine and the transmission's lifetime. They are situated in front of an engine's cooling system. This is a OEM direct replacement part. Radiators are important components of engine, which draw out excess heat to cool engines.Application:Cat® Engine Oil Cooler are used in radiator group on Cat® engines. Consult your owners manual or contact your local Cat® Dealer for more information.