According to the manufacturer's recommendation, the coolant should be replaced after 75 thousand kilometers or 5 years of operation (whichever comes first).
1. Open the hood and inspect the engine compartment. When inspecting the engine, pay attention to the presence of coolant in the expansion tank, check the condition and tightness of the connections..
2.... hoses to the pipes of the expansion tank..
3. …upper inlet hose and radiator steam outlet hose…
4.... hoses for heating the throttle pipe..
5.... hoses mounted on the thermostat housing..
6.... inlet and outlet hoses of the heater radiator.
If there is a coolant leak, replace the worm gear hose clamps.
Note. A broken hose can be temporarily repaired with adhesive tape.
Note. Reinforced adhesive tape is particularly suitable for this purpose (e.g. silver), which can be purchased at car dealerships.
Note. An exhaust valve is installed in the plug of the expansion tank. The valve plays an important role in ensuring optimum engine temperature. It maintains an excess pressure of at least 0.12–0.13 MPa in the system (1.2–1.3 kgf/cm2), providing an increase in the temperature at which the coolant begins to boil and preventing intense vaporization. Unfortunately, when the valve is stuck in the closed position during overheating, a significant excess of overpressure occurs - more than 0.2 MPa (2 kgf/cm2), which can lead to a rupture of the expansion tank or a breakdown of one of the hoses. In turn, the jamming of the valve in the open position leads to premature boiling of the coolant.
Note. Therefore, once a year, rinse the cap of the expansion tank with running water, and check the valve for jamming. If in doubt, replace the plug.