Blog for the motorist

 Why does the engine cooling fan often turn on Unlike a household fan that operates on hot days in apartments and offices, a car fan is not the main, but only an auxiliary mechanism of the cooling system. The main role in water systems (and the vast majority of cars today are equipped with such systems) is still played by the coolant - antifreeze, and the state of the circuit in which it is located. The fan, as a rule, is connected only when other components (thermostat, radiator) are not able to cope with engine cooling. FAN OPERATING PRINCIPLE The fan is always located in close proximity to the main radiator of the cooling system. Electric fans are placed in a casing screwed to the radiator housing, mechanical ones are located between it and the cylinder block. Depending on the design, the cooling fan drive is implemented according to the following schemes: Mechanical. The blades are either mounted on the crankshaft pulley or have a permanent belt drive. The most reliable, but ou...