Elements of the cooling system of a gasoline engine 1.8-I
- 1 - radiator;
- 2 - oil heat exchanger;
- 3 - water pump / thermostat;
- 4 - cylinder head / block;
- 5 - expansion tank;
- 6 - turbocharger;
- 7 - intake manifold;
- 8 - heater radiator;
- 9 - automatic transmission radiator
Elements of the diesel engine cooling system
- 1 - radiator;
- 2 - oil heat exchanger;
- 3 - water pump / thermostat;
- 4 - cylinder block;
- 5 - expansion tank;
- 6 - intake manifold;
- 7 - radiator for exhaust gas recirculation. Only ALH engines with automatic transmission;
- 8 - heater radiator;
- 9 - middle pipe of the cooling system;
- 10 - heat exchanger for cooling transmission oil;
- 11 - upper radiator hose,
- 12 - lower radiator hose
The sealed type cooling system includes a water pump, radiator fan, radiator, expansion tank, thermostat and heater core, as well as hoses and switches. When starting a cold engine, coolant circulates around the cylinder block and cylinder head. The warm coolant flows through the heater core to the water pump. Since the coolant expands when heated, its level in the expansion tank rises. The flow of coolant through the radiator is closed, which provides a closed thermostat. When the coolant reaches a predetermined temperature, the thermostat opens and hot coolant flows through the hose to the radiator. As the coolant passes through the radiator, it is cooled by the flow of oncoming air. When the coolant temperature is between +92°C and +98°C, the temperature sensor turns on the first stage of the radiator fan and the fan rotates at a reduced speed. When the coolant temperature is from +99°C to +105°C, the temperature sensor turns on the radiator fan to the second stage and the fan rotates at the maximum number of revolutions.
The electrically driven fan may also turn on after the ignition is turned off. Therefore, when working on a hot engine, it is necessary to disconnect the electrical connector from the fan motor for the duration of the work.
Warning: When opening the expansion tank cap on a hot engine, care must be taken as escaping vapors can cause severe burns. To do this, close the cap of the expansion tank with a thick layer of cloth and slowly unscrew the cap until a hissing sound is heard. After the hiss stops, slowly unscrew and remove the cap from the expansion tank.
Warning: Do not allow coolant to come into contact with clothing or body paintwork. Otherwise, rinse the surface with plenty of water.
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