Radiator parts work in conjunction with the water pump, head gasket, heaters and a maze of hoses to circulate radiator coolant through the engine block. Without a well-performing system, the explosions created inside the engine will lead to uncontrollable heat and self-destruction! When the engine is running it produces a lot of friction and heat. The radiator uses coolant to keep the engine running at a healthy temperature, therefore the radiator prevents the car engine from overheating.