A car radiator is a crucial component of a vehicle's cooling system. Its primary function is to dissipate heat from the engine, preventing it from overheating. The radiator circulates coolant, which absorbs heat from the engine and then releases it into the air as it passes through the radiator's fins. The radiator is typically made of aluminum or copper and consists of a series of tubes and fins that maximize surface area for heat exchange. Proper maintenance of the radiator, including checking coolant levels and inspecting for leaks, is essential for the overall performance of the vehicle and the longevity of the engine.