The main task of the cooling system is removing heat from the engine which allows it to operate at its normal temperature level. The cooling system consists of the following parts:

Water pump

In newer cars the water pump is driven by the timing belt. In older vehicles it is driven by the fan belt. With the help of the pump the coolant is moved from the radiator along the engine and then back to the radiator. The pump is equipped with a shaft with a pulley on one its end and with a rotor on the other end. The coolant is moved by the rotor when the pulley is spun with a belt.


The radiator is represented by a series of channels in which the coolant moves and is cooled by the air flowing through. Don’t forget to keep the coolant in a proper state in order the channels to be open in the radiator. When you change the coolant follow the manufacturer’s recommendations and this will help keep the radiator in a good condition.


With the help of thermostat the flow of the coolant though the engine is controlled. The thermostat operates with less efficiency when the engine is cold. The thermostat will prevent the coolant from flowing until the engine achieves the temperature ideal for it. The thermostat can fail in either closed or open state. Failing in the open position makes the engine run too cold and leads to a bad mileage. The engine will overheat in the event the thermostat fails in closed condition as the engine will not be washed with the coolant.


Along the hose the coolant moves from the radiator to the water pump and from the engine back to the radiator. Usually these hoses are made from rubber so with time they can tear. You should regularly check the hoses for tiny cracks. Remember that the hoses should be flexible and not dry.


Coolant is usually made of water and ethylene glycol. Often coolant is called Anti Freeze but actually it performs many functions. It not only prevents freezing but also serves to lubricate the water pump, increase water’s boiling point and prevents the cooling system from rust. Don’t forget to change the coolant regularly and do this according to the schedule recommended by your manufacturer. You should know that PH level is very important to prevent the coolant from turning into metal-eating liquid. So remember to check the coolant not only for freeze point but also for PH level to make sure that it has not turned into acid.