1.8-92 kW engine cooling system diagram
1 - expansion tank of the cooling liquid; 2 - suction pipeline; 3 - throttle control unit; 4 - heat exchanger; 5 - radiator (only with automatic transmission); 6 - radiator; 7 - oil cooler; 8 - coolant regulator; 9 - coolant pump; 10 - engine block crankcase
Schematic diagram of the engine cooling system 1.9 TDI - 66 kW
1 - radiator; 2 - oil cooler; 3 - coolant pump with thermostat; 4 - crankcase of the engine; 5 – a broad tank of a cooling liquid with a jellied mouth; 6 - suction pipeline; 7 - heater heat exchanger; 8 - oil cooler for automatic transmission (if it is installed); 9 - additional heater
There are many options for the cooling system of Skoda Octavia series. Its choice depends both on the type of engine used, and on the type and range of vehicle equipment (e.g. air conditioning, trailer, automatic transmission) and, thirdly, on climatic conditions, i.e. from the highest temperatures in the area in which the car will be operated (area with maximum temperature up to 40°C and areas with maximum temperature up to 50°C).
In principle, the cooling system in all types is solved in the form of forced cooling with an additional one or two fans, which can be one- or two-speed.
The fans are driven by electric motors. Radiators also come in several types.
Coolant circulation is provided in all types of engines and cooling systems by a pump driven by a belt from the crankshaft. The coolant pump is part of the engine. When using different engines and different vehicle equipment, there are different elements in the cooling systems.
The coolant is further devoted to an independent chapter. Here it is only necessary to say that the coolant is simultaneously used to heat the car, as well as to cool the oil coolers.
Cooling systems of all types have drain plugs.
The plug is located at the bottom of the radiator in place of the drain fitting. Cork (plastic bolt) sealed with a rubber ring.
In conclusion, it should be mentioned that the components of the cooling system are also chambers in which the engine oil cooler and the automatic transmission oil cooler, if installed, are placed. Cooling the oil coolers with coolant ensures that the oil temperature is kept within a small range of fluctuations.