2. Look at the thermostat first. If there is nothing wrong with the thermostat, it is recommended to replace the water pipe, and it is best to clean the water tank. It is also best to use a high-pressure air pump to blow the sundries in the radiator to better dissipate heat.
3. If there is water leakage in other places, check the seal.
There are two situations when the car is not hot and the kettle is sailing against the current:
1, the big foot stepped on the gas pedal, and the water tank appeared anti-water. This situation is mainly due to the large gap or crack in the wet cylinder liner or cylinder head. When the engine is working, the pressure of compressed air or gas in the cylinder is greater than the pressure of coolant in the cooling water channel, and these combustible gases will enter the engine water channel from the gap, so there will be water backflow in the kettle.
2. When the engine is working, there is no air in the coolant. Regardless of the water temperature, the coolant is not sprayed from the water inlet of the expansion tank of the fuel filler door, but when the throttle valve is closed.
Water tank waterproof and thermostat
It has nothing to do with the backwashing of the water tank and the return pipe blockage or blockage of the upper part of the water tank or thermostat leading to the expansion water tank. Because the coolant in the sump of the water tank and the inlet pipe of the water pump is negative pressure, such as suddenly turning off the throttle or stopping the machine.
The working efficiency of the water pump decreases or stops working. If the water chamber in the water tank and the return pipe leading to the expansion tank on the thermostat cover are blocked or blocked, the cooling liquid will rapidly flow into the expansion tank in the reverse direction along the water inlet pipe of the expansion tank under the action of high pressure, causing the water in the water tank to flow back.