For additional cooling of the liquid, a radiator fan is installed. At low temperatures, the viscous coupling on the hub of the fan rotor reduces the speed of its rotation. With an increase in the temperature of the coolant to a certain value, the clutch turns on the fan and it runs at an increased speed.
Depending on the configuration, for example, air conditioning, an electric radiator fan is additionally installed. This fan is controlled by a two-stage thermostat, which is screwed into the radiator at the bottom left or is located in the lower coolant circulation hose. When the coolant reaches a temperature of +92-97°C, the thermal switch turns on the electric fan, which operates at the first stage of rotation. With an increase in the temperature of the coolant to + 99°- +105"With the electric fan running at full power.
Due to the fact that the electric radiator fan does not work constantly, and the circulation of the coolant is regulated by a thermostat, the engine warms up to operating temperature faster. This reduces fuel consumption.
Attention! The electric fan, under the influence of heat accumulated in the engine compartment, can automatically turn on even when the ignition is off. Before working in the engine compartment, especially near the radiator fan, it is recommended to disconnect the electric fan power plug.
Attention! When working on the cooling system, do not allow coolant to get on the timing belt. Ethylene glycol, which is part of the coolant, can damage the belt base so much that it breaks after a while. This, in turn, is fraught with serious engine damage.
1.0. Coolant circulation. Cars about gasoline engine:
1 - right additional radiator
2 - vent plug
3 - thermostat
4 - oil cooler
5 - cylinder head
6 - heater radiator
7 - ventilation hole
8 - cover of the expansion tank of the coolant
9 - coolant expansion tank
10 - vent plug
11 - left additional radiator
12 - return valve
13 - radiator
14 - thermostat
15 - water pump
16 - generator
1.0a. Coolant circulation. Vehicles with diesel engine and parking heater:
1 - radiator
2 - thermostat
3 - coolant temperature sensor
4 - cylinder head
5 - water pump
6 - ventilation hole
7 - heater radiator
8 - coolant expansion tank
9 - oil cooler
10 - parking heater
1.0b. Coolant circulation. Vehicles with a diesel engine and an afterburning exhaust gas cooler:
1 - radiator
2 - thermostat
3 - coolant temperature sensor
4 - cylinder head
5 - water pump
6 - cooling radiator for exhaust gas afterburning
7 - ventilation hole
8 - heater radiator
9 - coolant expansion tank
10 - oil cooler
Visitor comments