Radiators are one of the most important elements of engine cooling systems. Their purpose is to disperse any excessive heat generated during the combustion process conducted in the engine through the coolant that flows within it. Radiator cores are usually made of copper or aluminium, and the tanks are made of brass, steel, plastic or aluminium. The choice of materials depends on the application, operating conditions and the environment in which the heat exchanger is designed to work. Depending on its usage, a liquid cooler can be provided with an additional built-in heat exchanger, such as an oil cooler and/or integrated surge tank.