1. Open the hood and inspect the underhood space. When inspecting the engine, pay attention to the presence of coolant in the expansion tank, the integrity of the rubber hoses, and the radiator.
Note: A burst hose can be temporarily repaired using adhesive tape. Reinforced adhesive tape is especially good for this purpose (for example, silver color), which can be purchased at auto stores.
2. Inspect the connections to the radiator supply…
3. …and the discharge hoses.
4. Inspect the connections of the cooling system hoses to the heater radiator pipes…
5. …and with the thermostat module pipes.
6. Check the tightness of the hose connections to the water pump and tee…
7. …with thermostat…
8. …expansion tank…
9. …and the throttle assembly.
Note: For clarity, shown with the air supply hose removed.
Useful tips
There are two valves installed in the expansion tank cap: an inlet valve and an outlet valve.
The exhaust valve plays a major 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 is jammed in the closed position during overheating, a significant excess of excess pressure occurs - more than 0.2 MPa (2 kgf/cm²), which can lead to a rupture of the expansion tank or a tear in one of the hoses. In turn, jamming of the valve in the open position leads to premature boiling of the coolant.
Therefore, once a year, wash the expansion tank plug with running water, and check the valve for sticking by pressing with a thin screwdriver. If in doubt, replace the plug.
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