A typical automotive cooling system embraces of
(1) A series of channels cast into the engine block and cylinder head, surrounding the combustion chambers with circulating water or other coolant to carry away excessive heat
(2) A radiator, consisting of many small tubes equipped with a honeycomb of fins to radiate heat rapidly, which receives and cools hot liquid from the engine,
(3) A centrifugal-type water pump with which to circulate coolant,
(4) A thermostat, which maintains constant temperature by automatically varying the amount of coolant passing into the radiator, and
(5)A fan, which draws fresh air through the radiator.