What are the symptoms of high water temperature in the car engine

Poor heat dissipation of automobile engine and air conditioning system can easily cause excessive water temperature of the vehicle, and the following fault phenomena usually occur:

1. When the hot car is idling, the clutch of the air conditioning compressor is frequently sucked off or even disconnected, resulting in the air conditioner not being refrigerated.

2. The refrigeration temperature of the air conditioner is very cool when the car is cold, and the refrigeration effect of the air conditioner is not obvious when the car is hot; And there is a loud resonant hum in the air conditioning system.

3. After the hot car is turned off for more than ten minutes, it is not easy to get on the car when it starts; When a hot car is moving, it sometimes turns off automatically.

4. When the traffic is not smooth, the traffic jam or idling for a long time, the engine water temperature gauge is too high, the working time of the electronic fan is too long, the engine noise increases, and the fault is most obvious when the air conditioner is turned on when the temperature is too high.

5. When the temperature is too high and the air conditioner is turned on, the idle speed is unstable, the speed fluctuates too much, the rapid acceleration is weak, and the engine has abnormal noise.

First of all, after the car is warmed up, check the water return pipe at the upper end of the antifreeze water storage tank, if the water return is not smooth or blocked, the water temperature will be too high.

Secondly, the high pressure at the high end of the air conditioning system is too high; Excessive filling of air conditioning refrigerant or air conditioning refrigeration lubricant; The self-adjusting function of the internal self-debugging air-conditioning compressor fails, resulting in high pressure; There is also the blockage of the air conditioning condenser, which will increase the load on the engine, consume the heat dissipation performance of the cooling system, and cause the failure of the water temperature to be too high.

Third, due to the non-standard addition and replacement of antifreeze, it will cause the engine waterway and water tank to be blocked in advance, and the water temperature will be high. Antifreeze is changed every two years, and original parts must be used when replacing and adding.

Fourth, check whether there is too much dust between the condenser and the water tank, and clean it thoroughly with high-pressure gas to ensure that the water tank and the condenser have good heat dissipation performance.

Fifth, when the car is hot, check the temperature difference between the upper and lower water pipes of the water tank, if the temperature difference is too large, you need to check the opening of the thermostat and whether the pump has the fault of speed loss.

If the engine temperature is too high, first of all, we find that the power of the engine does not drop significantly, because the engine temperature is too high, which may cause the viscosity of the oil to become low.

There are many reasons why a car engine is too hot:

1. Most of them are due to water pipes, water tanks. The oil radiator leaks water, and the lack of cooling water leads to high engine water temperatures.

2. The water tank is clogged. As a result, the coolant of the engine cannot be circulated through the tank to dissipate heat.

3. The water pump is broken. The power to circulate the entire coolant is gone.

4. The thermostat is broken. The large coolant circulation cannot be turned on at the set temperature.

5. The electronic cooling fan is broken or the temperature control switch is broken, resulting in the failure to start the fan to dissipate heat.

6. The waterway inside the engine is blocked.

In order to avoid high engine temperature, it is necessary to check the coolant of the engine on a regular basis, and add it in time if the coolant is less. If the engine water temperature is high, stop the car immediately for inspection. Or call ** to the 4S shop repair factory to rescue. The engine coolant water can be replaced by calculated water.

Remove the thermostat, check the belt, fan, still can't clean the water tank, be sure to find a professional water tank.

The reason for the high temperature of the water is that the refrigeration blades do not rotate; Not enough refrigerant material; Destruction of water temperature sensors; clogged water storage tank; Common faults of centrifugal water pumps; cylinder corrosion, etc. Put on rubber gloves, add a double piece of telescopic wet rag to the water tank cover, gently twist the water tank cover open a small gap, wait for the water vapor to gradually drain out, and fill the water tank gas pressure down, fill with cold water or car antifreeze. The reason for the high temperature of the automobile engine is that the refrigeration blades do not rotate; Not enough refrigerant material; Destruction of water temperature sensors; clogged water storage tank; Common faults of centrifugal water pumps; cylinder corrosion, etc.

Lack of cold-proof refrigerant: divided into 2 conditions, one is of course lacking, and it can be replenished when it is cool; The other is the leakage of antifreeze in the car, which can be divided into air leakage and exposure. Air leakage refers to the penetration of refrigerant into the internal structure of the automobile engine, such as the destruction of the cylinder gasket and the sand holes in the cylinder wall, which will cause air leakage, and the whole process of maintenance is relatively complicated, and the automobile engine must be dissolved before it can be treated.

Exposure is very simple, and it is usually possible to look for leaks based on eye inspection, and then solve or replace damaged parts to deal with the problem of continuous high temperatures.

Destruction of water temperature sensor: The water temperature sensor is mainly used to manipulate the refrigeration system to carry out large and small circulation system parts, the ambient temperature gradually rises after the refrigerant enters the car engine, then the water temperature sensor is turned on, and the refrigerant is injected into the heat exhaust storage tank to gradually refrigerate, and after cooling, it enters the car engine again, so that the circulation system continues. If the water temperature sensor can not be opened normally, it means that the refrigerant can not enter the water storage tank to exhaust heat, and the car engine will continue to be at high temperature.

In addition, some car series have gradually selected electronic device water temperature sensors, so it is necessary to check whether the water temperature sensor route is not a hazard.

Centrifugal water pump is not working: centrifugal water pump is mainly used for the internal circulation of refrigerant in the heat exhaust system software car, which can generally be divided into two types: centrifugal water pump for mechanical equipment and centrifugal water pump for electronic devices. If the impeller of the mechanical equipment falls or the transmission belt deviates, the refrigerant will not circulate to the system, and it will not be able to enter the water storage tank to exhaust heat, which will cause the vehicle to continue to be high, and the solution is to replace the centrifugal water pump with a new one.

In addition to the continuous high temperature caused by the falling of the leaf surface, there are also common faults such as short circuit faults of electronic wiring harnesses and melting of fuse wires, which will also cause the centrifugal water pump of electronic devices to not work. Therefore, after finding the root cause of a common failure, it is sufficient to carry out a purposeful solution.

It could be caused by a lack of coolant, or it could be caused by a faulty water temperature gauge.

High water temperature in a car's engine can be caused by a lack of coolant or a malfunctioning cooling fan.

If the coolant is insufficient, it may also be a leak in the water tank, and it may also be related to the fan, and the specific reason is more complicated.

1. First of all, after finding that the water temperature is too high and stopping to the side, it should not be turned off immediately, because there are many reasons for the high water temperature, but there is probably only one fault each time, if all other functions are turned off, the water temperature will be too high, damaging the engine, the accurate approach should be to idle the park, open the hood, turn on the heater, dissipate heat as soon as possible, and pay attention to parking in a cool place. 2. Next, we have to check whether the coolant is sufficient, this situation is likely to be that the owner usually does not care about forgetting to add it in time, and it should be noted that the owner must choose the same brand and model of product when adding coolant, otherwise it may cause chemical reaction due to different components and lead to the failure of antifreeze. 3. Then, we are looking at whether the cooling fan is running normally, and the failure of the cooling fan will cause the heat generated in the car engine to be transferred to the antifreeze at high running speeds and not get timely heat dissipation, resulting in an increase in the temperature of the antifreeze.

If the fan is stuck or the insurance is burned, you can solve it as soon as possible after the power failure, if it is a line problem, it can only be handed over to the professionals of the 4S shop to overhaul. Extended Information:Car Radiator Function:

The function of the cooling system is to dissipate excess and useless heat from the engine, so that the engine can operate at normal temperature at all speeds or driving conditions.

The water tank is the heat exchanger of a water-cooled engine, which is cooled by air convection to maintain the normal operating temperature of the engine. Once the engine cooling water in the water tank boils and vaporizes and expands due to high temperature, and the pressure exceeds the set value, the pressure is discharged from the water tank cover (a), which causes the cooling water to decrease and prevent the cooling system line from bursting.

When driving, you should pay attention to whether the engine cooling water temperature gauge pointer on the dashboard is normal. In addition, if the engine cooling fan fails and the engine cooling water temperature rises or the cooling system pipeline leaks, the cooling water may also be reduced.

1. The water temperature is too high due to installation problems.

1) The distance between the water tank and the engine is too large, and the fan is outside the wind circle, which can be solved by adjusting the installation position of the water tank;

2) The air-conditioning condenser is blocked in front of the water tank, and there are two solutions: one is to change the installation position of the air-conditioning condenser if there is enough space in the engine compartment; Second, if the generator generates sufficient electricity, install an electric fan in front of the condenser.

2. The water temperature is too high due to use and maintenance problems.

1) The engine structure is compact, the corresponding waterway is small, in the southern region, soft water or distilled water must be added to avoid scale in the waterway; In the northern region, it is necessary to go to the maintenance station or regular repair shop to fill the first cooling (antifreeze) liquid to avoid cylinder head corrosion.

2) After the engine is drained with water, or the engine lacks too much water, the air in the engine may not be completely discharged after the first water filling, and if no measures are taken, it may cause air resistance and make the engine temperature too high. The solution is: after adding water, after running the engine for a few minutes, open the water filler cover and fill up the water again.

3) Gasoline can not reach the specified number (in principle, it is not allowed to be used) or the ignition time is in front, which can lead to engine detonation and make the water temperature too high.

4) Check the oil and water before leaving the car every day to make sure the water tank is full of water.

5) The fan belt is too loose, which can lead to high water temperature. The belt tension can be adjusted appropriately.

3. The failure of some parts may lead to excessive water temperature.

1) If the idle speed of the air conditioner is too low, which can lead to high water temperature, check whether the idle speed booster of the air conditioner is working normally;

2) The plane of the cylinder head is uneven, or the cylinder gasket is flushed, which can lead to high water temperature. The inspection method is: when the engine is cold, open the water inlet cover and start the engine, if there are bubbles gushing out of the water tank, it may be the problem.

3) Faulty parts of the engine cooling system (such as thermostats, water pumps, fan clutches, etc.) can lead to high water temperatures, and the corresponding parts should be checked and replaced.

1. Insufficient coolant.

Coolant leakage or lack of coolant will cause the engine water temperature to rise, then we should check the coolant situation, if the deficiency is added to the appropriate place first, and then after a few days to check if the fluid level is seriously dropped, if so, then we need to find the leak location.

2. The cooling fan is faulty.

If the cooling fan fails, the heat generated by the vehicle cannot be transferred to the antifreeze in time when the vehicle is running at high speed, which will affect the heat dissipation, and then cause the temperature of the antifreeze to rise, resulting in problems such as boiling the pot.

3. Circulating water pump failure.

Water pump failure has several situations of bearing locking and impeller damage, bearing locking is relatively rare, impeller damage is common after impeller cracking or impeller loosening from the pump shaft, resulting in coolant circulation speed slowdown, easy to cause engine temperature too high failure.

4. Thermostat failure.

The function of the thermostat is to automatically adjust the amount of water entering the radiator according to the temperature of the cooling water, and change the circulation range of the water to adjust the heat dissipation capacity of the cooling system and ensure that the engine works within the appropriate temperature range. If the thermostat fails, then the car's cooling system may not be able to circulate largely, causing the water temperature to rise.

5. Poor heat dissipation of the water tank.

I believe that some car owners have tried to use water as coolant, once or twice is no big problem, remember to clean the cooling system and replace it with coolant, if you use water for a long time to do ** will cause rust in the engine and water tank, poor heat dissipation of the water tank leads to high water temperature.

Hope, thank you!

The symptoms caused by high engine water temperature are as follows: 1. High cylinder wall temperature will damage the lubricating oil film of the cylinder wall, reduce the lubrication performance, and accelerate the wear of parts; 2. The piston and piston ring in the cylinder expand and destroy the mating gap due to high temperature, resulting in an increase in wear resistance, and in serious cases, the phenomenon of bite may occur; 3. The temperature of the engine is too high, and the inhalation of combustible mixture will cause thermal expansion, and the amount of mixture entering the engine will be reduced, resulting in a decrease in engine power, and will also cause detonation and premature ignition, which will destroy the normal operation of the engine.