Symptom:
    Owners are reflected in the low-speed or high-speed driving, the water tank temperature is very high, close to the red line, the city road speed when driving this phenomenon.
    Failure analysis:
    Dong master after the test found that as the owner described, the water temperature pointer ups and downs, or close to the red line, or lower than the normal temperature.
    Dong master for the above phenomenon to make the following judgments: cause such a phenomenon for many reasons, there are big and small, such as heat sinks in the accumulation of some debris, insect corpses, etc., will cause poor heat dissipation, resulting in water temperature is too high. If the electronic fan can not work properly will cause the consequences of poor heat dissipation, and ultimately lead to water temperature is too high. The possibility of failure of the thermostat is greatest, because many car thermostats are prone to failure. In addition, the poor quality of antifreeze is also caused by high water temperature reasons. Dong master also introduced the most complex reason is the steel pad deformation, this will cause the cylinder pressure becomes high, hinder the water cycle. This fault check process is more complex and difficult to solve.
    Troubleshooting:
    Into the workshop, the car, open the engine cover, about half an hour later, cool car, remove the heat sink, remove debris, re-install.
    Check the electronic fan: the first thermostat connected with the electronic fan plug unplugged, shorted, launched the car, the electronic fan is running properly, remove the electronic fan failure.
    Check the thermostat: hand touch the water pipes and found that the temperature difference between the two ends of the water is very large, so to determine the poor water circulation. Remove the thermostat and pour the water onto the above valve. According to the normal situation, if the thermostat is no problem, the valve in case of boiling water should be quickly opened. But the car thermostat in the case of water after the valve did not respond, to determine the cause of this car is the reason for high water temperature. Replace the thermostat, re-test, troubleshooting.
    Technician advice:
    If the owner of the road in the process of running the water temperature table shows the temperature is close to the red line, should immediately stop, but should not immediately turn off. Because some of the owners in the face of such a situation after the first reaction is to stop the flame, but not knowing that the water temperature is too high may be because the water jacket is too high, if the flame at this time, the parts are still in the expansion state, The gap is very small, after the shutdown will cause some soft metal off, and some even cause sticky cylinder.
   In addition, avoid immediately open the lid to add water. In the radiator in the water temperature will reach more than 100 degrees, the internal pressure is great, if immediately open, hot water will pour out as the fountain, causing staff burns. If you want to add water, should be cool for some time after the car, and then wet towel pad, the water cover will open, release the steam, then add water.
    There is, should not use cold water directly to the engine on the splash, this will cause the engine block due to burst and burst.