1. Engine block; 2. Cylinder head; 3. Liquid cooling pump; 4. Coolant regulator (thermostat); 5. Upper coolant pipeline; 6. Radiator with horizontal coolant flow; 7. Lower coolant pipeline; 8. Oil cooler; 10. Compensation tank; 11. Reserve silicate to prevent corrosion of aluminum alloys; 12. Drain tank; 13. Air removal line; 14. Refueling line; 15. Heat exchanger of the heating system; 16. Heating supply; 17. Heating outlet on the right; 18. Heating outlet on the left; A - the mode of circulation of the coolant along the small circuit. The coolant circulates only in the engine when its temperature is below 87°C; B - mixed mode. When the coolant temperature is in the range of 87–102°C, the coolant regulator is partially open. The latter also flows through the radiator; C - cooling mode. When the coolant temperature is above 102°C, its regulator is fully open. All coolant flows through the radiator
As part of maintenance, the coolant should be replaced every 3 years. If the cylinder head gasket, radiator, heat exchanger or engine were replaced during the repair of the cylinder head, replace the coolant in each case. This is necessary because anti-corrosion decomposition products are deposited on new parts made of light alloy during the running-in period and form a strong anti-corrosion layer. As a rule, used coolant does not contain enough of these anti-corrosion decomposition products to form the necessary protective layer on new parts.
If the coolant is drained as part of other repairs, reuse it.
Attention! Coolant is poisonous and should not be simply thrown away or mixed with household waste, but must be drained to designated areas.
1. Disconnect the ground wire (–) battery.
Attention! This erases the anti-theft code of the radio.
2. Turn the cap on the expansion tank to the left until it locks into place and excess pressure escapes from the cooling system. Then turn the cover further and remove it completely.
Attention! If the engine is hot, place a thick rag around the cover before removing the cover to avoid burns from hot coolant or fumes. Remove cap only at fluid temperatures below 90°C.
3. Remove the bottom cover of the engine compartment.
4. Attach to radiator drain (arrow) hose with an inner diameter of 12 mm.
5. Place a clean receiving vessel under the radiator. Insert the hose into the receiving vessel and open the drain plug (3).
Drain
1. Fit on the drain plug (4) on the engine block, a hose with an inner diameter of 12 mm.
2. Place a clean collection vessel under the engine, insert the hose into it, and only loosen the drain plug without completely unscrewing it.
3. Drain the coolant completely.
4. Tighten the drain plug on the engine block to 30 Nm.
5. Screw in the drain plug on the radiator with a torque of 1.5 to 2 Nm (manually).
6. If attached, remove the drain hose.
7. Install the bottom cover of the engine compartment.
Refueling
1. Check the antifreeze content in the coolant.
2. Fill coolant up to the mark (arrow) through the filling pipe of the compensation tank (2). For vehicles without a separate expansion tank, up to the mark in the filler pipe, in the case of a black upper part of the tank, up to the beginning of the black part.
3. Connect the ground wire to the battery.
4. Allow the engine to warm up at idle until the thermostatic coolant regulator opens (coolant temperature approx. 100°C). At the same time, set the heating to full power and jerkily press the accelerator pedal.
Attention! At a coolant temperature between 60 and 70°C, close the expansion tank.
5. Check the tightness of the cooling system hose connections, as well as the drain plugs and the liquid cooling pump.
6. Set the time on the clock.
7. Enter the radio's anti-theft code.