You will need: a flat-blade screwdriver, coolant, a cleaning cloth, a container for draining the coolant with a capacity of at least 8 liters, and pliers.
Warnings: Use ethylene glycol based coolant (antifreeze).
Replace coolant only when the engine is cold.
When starting the engine, the expansion tank cap must be closed. Screw the tank cap tightly. The cooling system is under pressure when the engine is running, so coolant may leak from under a poorly screwed cap.
Coolant is toxic, so be careful when handling it.
1. Place the vehicle on a level, horizontal surface.
2. Unscrew the expansion tank cap.
3. Connect the radiator hose of the cooling system to the drain cock, located at the bottom of the tank on the right side.
4. Unscrew the drain cock valve.
5. Place a container under the hose and drain the liquid from the cooling system.
6. To ensure complete drainage of fluid from the system and guaranteed removal of air from it when filling, squeeze the tabs of the throttle heating hose clamp, slide the clamp along the hose...
7. ...and remove the hose from the throttle body fitting.
8. Close the drain valve.
Note: If the expansion tank is heavily contaminated, remove and clean it.
9. Flush the cooling system by reinstalling the coolant supply hose to the throttle assembly and slowly filling the system with water through the expansion tank to the level of the steam outlet tube.
10. Start the engine and let it run until the electric fan turns on.
11. Turn off the engine and drain the water.
12. Flush the cooling system until clean water starts to drain.
13. Disconnect the hose from the throttle body fitting again.
14. Fill the engine cooling system by pouring coolant into the expansion tank until it starts to flow out of the fitting on the throttle assembly and from the removed hose. When the liquid starts to flow out, put the hose back in place and secure it with a clamp.
15. Start the engine and warm it up to operating temperature (before turning on the fan). After this, stop the engine, check the coolant level and, if necessary, add it to the expansion tank up to the "MAX" mark.
Note: While the engine is running, monitor the coolant temperature using the gauge. If the needle reaches the red zone and the radiator fan does not turn on, turn on the heater and check what kind of air passes through it. If the heater supplies warm air, the fan is most likely faulty, and if it supplies cold air, then an air lock has formed in the engine cooling system. To remove it, turn off the engine, let it cool down and unscrew the expansion tank cap. Start the engine, let it run for 3-5 minutes and screw the tank cap back on.
Helpful Hints: To ensure the system fills better without air locks, periodically squeeze the radiator hoses with your hand.
After several days of vehicle operation after replacing the coolant, check its level. Replenish the level if necessary.
If after a very short time the color of the fresh liquid turns brown, it means that you have poured in a fake, to which the manufacturer "forgot" to add corrosion inhibitors. In addition, one of the signs of a fake is a sharp complete discoloration of the liquid. The dye of a quality cooling liquid is very stable and only darkens over time. The liquid tinted with linen blue discolors. Such "antifreeze" must be replaced quickly.