According to the manufacturer's recommendation, the coolant should be replaced after 75 thousand km of mileage or 5 years of operation (whichever comes first).
1. Open the hood and inspect the underhood space. 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 expansion tank pipes…
3. …the upper supply hose and the steam outlet hose of the radiator…
4. …throttle body heating hoses…
5. …hoses installed on the thermostat housing…
6. …inlet and outlet hoses of the heater radiator.
If coolant leaks, replace the worm drive hose clamps.
Original text on the website LADAMAN.RU
Note: A burst hose can be temporarily repaired with tape.
Note: Reinforced adhesive tape is especially good for this purpose (for example, silver color), which can be purchased at auto stores.
Note: There is a release valve installed in the expansion tank cap. The valve plays an important role in ensuring the optimal temperature regime of the engine. It maintains excess pressure in the system of at least 0.12–0.13 MPa (1.2–1.3 kgf/cm²), ensuring an increase in the boiling point of the coolant and preventing intensive vaporization. Unfortunately, when the valve gets stuck in the closed position due to overheating, a significant excess of pressure 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, jamming of the valve in the open position leads to premature boiling of the coolant.
Note: Therefore, once a year, rinse the expansion tank cap with running water and check the valve for jamming. If in doubt, replace the plug.