A car radiator is actually a heat exchanger type. The radiator transfers heat from the hot coolant through blown air. Most cars have aluminum radiators, made of thin aluminum fins and/or flattened aluminum tubes. Heat coming from the tubes are conducted and transferred by flowing air through the radiator.
How a car radiator works
Tanks are placed on each side of the radiator. Within the tank is the transmission cooler. The oil coming from the transmission goes into the cooler. The transmission cooler acts as the radiator inside the radiator, allowing the oil to exchange heat with the coolant. When the engine begins to heat up, the thermostat opens up to permit the flow of coolant and water after attaining a certain temperature. The radiator holds the water/coolant combination.
Taking care of your car radiator
Be sure to check the radiator overflow when the car becomes cold. Fill the radiator with water or antifreeze if it is empty. If it is not empty, flush it but do not make it rust. Causing it to rust may lead to you buying a new radiator. Flush it and apply commercial radiator sealant if the radiator starts leaking. If your car continues to overheat, have it checked by a mechanic. You can also check the lower and upper radiator hoses on its top and bottom held by hose clamps.
Understanding the role of car radiators enables one to maintain it properly. This way you can learn to fix it on your own without paying extra for service and maintenance.