There are many reasons for the high water temperature of automobiles, most of which are caused by the leakage of water pipes and insufficient cooling water. Common ones are: fan belt breakage, water tank or water pipe leakage, thermostat failure, oil leakage, etc. If the engine power disappears or turns out to be violent knock, knock, etc. when the car is running, it is mostly due to the overheating of the engine.

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Excessive water temperature

The specific reasons are as follows.

(1) The cooling fan does not turn. The cooling fan may be controlled by a temperature control switch or by a water temperature sensor.

(2) Insufficient cooling medium. ① Antifreeze fluid: high-grade cars need to be filled with antifreeze throughout the year; ② water or distilled water: temporary substitution; ③ water tank cover leakage.

(3) Damage of thermostat. If you want to remove the thermostat, you should plug the small circulation at this time, so as to ensure that all the cooling fluid is radiated by the water tank; when installing the new thermostat, you should pay attention to the water hole, such as Santana has no water hole, and drill a hole with a 6mm bit at this time. One is to mark the car; the other is to make the temperature difference between the two sides of the thermostat during the heating process, so that the thermostat opens accurately with the water temperature.

(4) The water tank is blocked. External blockage uses water or gas to remove dirt; Internal blockage affects the circulation of coolant and produces pressure. There are two results, one is leakage of water tank, the other is that the water temperature is very high when driving at high speed.

(5) Pump failure. The impeller slipped or stuck, which resulted in the breakage of timing belt and the deformation of impeller.

(6) Cylinder erosion. ① Combustion chamber and water channel flushing, which will drain or discharge white smoke from drainage pipes, resulting in frequent water shortage of water tank; ② water channel and oil channel flushing (oil water is white); and ③ water channel and water channel flushing, resulting in poor heat dissipation of cylinder block, especially at high speed; and ④ water channel blockage.

(7) Incorrect ignition timing (corrected by timing lamp) and excessive oil pressure.

Harm of Excessive Water Temperature in Automobile

Excessive water temperature is commonly known as "boiling pot". "Boiling" can cause cylinder head, cylinder body deformation and even damage.

Excessive water temperature

In summer, high temperature makes it difficult to heat the water tank, engine water temperature will rise to varying degrees, rubber hose is also more likely to soften and cooling water leakage occurs, therefore, high water temperature or even boiling on the road becomes common. Normal engine water temperature should be constant between 85-95 degrees Celsius. When the water temperature is too low, the fuel entering the cylinder can not atomize well, the power and economy are not good, and when the temperature is too low, the clearance between the parts is too large, and the noise and vibration will be larger. When the water temperature is too high, the oil viscosity will become thinner and the lubrication strength will decrease. At the same time, high-speed moving parts such as piston and valve will be more easily deformed, resulting in engine weakness. In severe cases, the expanding piston will pull the cylinder, crankshaft bush and lock the crankshaft, and the consequences are unimaginable. Therefore, if the thermometer pointer is close to the red area or the water temperature warning light is on, it should stop by the side immediately and check the flameout.