Living in Australia, some drivers might argue that a car’s cooling system is one of its most important functions. Your car’s cooling system removes excess heat from the engine, and regular servicing is vital to maintain reliable performance and to avoid costly engine repairs.
A little less than a third of the energy generated by your car through burning fuel is converted to mechanical energy to run your car; the rest converts to heat. Some of that heat is blown straight out of the exhaust, but the rest heats the engine itself. Your car’s cooling system works by moving coolant (water plus antifreeze) through the engine, where it picks up heat, and then passing that heated coolant through the radiator, where the heat is transferred to the surrounding air. The cooling system must have enough cooling capacity to cool a car under extreme conditions such as when towing a caravan or operating in scorching heat, as well as maintaining the correct engine operating temperature in extreme cold, such as on a visit to the snowfields.