Engine cooling circuit with turbocharger 1.8 l
- 1 radiator
- 2 oil cooler
- 3 coolant pump/thermostat
- 4 cylinder head/side
- 5 expansion tank
- 6 turbocharger
- 7 inlet pipeline
- 8 heater radiator
- 9 ATF cooler. Only for models with automatic transmission
The cooling circuit of other engines is built on the same principle.
While the engine is not warmed up, the coolant circulates only in the head and cylinder block and in the passenger compartment heater heat exchanger. As the coolant temperature rises, the thermostat opens the large cooling circuit. The coolant is directed through the radiator by a constantly running pump. The liquid passes through the radiator from top to bottom and is cooled by the air passing through it.
To improve cooling efficiency, the system is equipped with a temperature-controlled fan.
The control is carried out from a two-stage thermal switch, screwed to the left of the expansion tank of the radiator. At a coolant temperature of +92°to 97°C, the thermal switch turns on the first stage of the fan (half of full speed). If the temperature of the coolant rises from +99°to 105°C, the fan turns on at full speed.
Due to the fact that the fan does not run constantly, as well as the presence of thermostatic control of the flow of coolant, the operating temperature of the engine is reached faster and fuel consumption is reduced.
Warning: The electric fan may turn on when the ignition is off. Due to thermal stagnation in the engine compartment, the fan may be switched on repeatedly. Remedy: Disconnect the radiator fan connector.
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