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Typical Cooling System

    There are two types of cooling systems on cars:liquid-cooled and air-cooled.

    Liquid cooling

    The cooling system on liquid-cooled cars circulates a fluid through pipes andpassageways in the engine. As this liquid passes through the hot engine, it absorbs heat,cooling the engine. After the fluid leaves the engine,it passes through a heat exchanger,or radiator, which transfers the heat from the fluid to the air blowing through theexchanger.

    Air cooling

    Some older cars, and very few modern cars,are air-cooled. Instead of circulating fluidthrough the engine,the engine block is covered in aluminum fins that conduct the heataway from the cylinder. A powerful fan forces air over these fins,which cools the engineby transferring the heat to the air.

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