Why is the water temperature too high?

Question 1: What is the reason for the high water temperature in the car? How to solve it? 20-point solution: from simple to complex, from low cost to high cost.

1: Check whether the water tank leaks. Open the water tank to see if the water level is lower than MIN. If the water level is very low, it is likely to be leaking. Add water, open the exhaust screw near the engine to exhaust, and check the water leakage point. The air in the water tank will also cause the water temperature to be too high. Water leakage is usually caused by a cold car. Check again after the hot car cools down, and pay attention to whether there is water leakage in the warm water pipe joint leading to the cab. There is a lot of water leakage in the morning, just look at the ground under the car. If there is no water leakage point, but the water gradually drops below the lowest point after being filled with water for one week or half a month, there is another possibility that the cylinder gasket is Dan, and the water seeps into the engine and is consumed. Open the oil filler to see if there are bubbles and bubbles, see if there is oil on the water tank cover, and see if there are white water drops on the dipstick. If there is, water is seeping in. The cylinder gasket needs to be replaced.

2: Replace the water temperature sensor. Not boiling the pot just means that the water temperature is high, or it may be caused by the inaccurate water temperature sensor. Replace the water temperature sensor.

3: Change the thermostat. When the thermostat is not turned on, cold water and hot water will not circulate. When the water temperature reaches 90 degrees, open the hatch cover and touch the water pipe near the engine (be careful). If the water tank is not hot, it means that the water is not circulating. It's hot on both sides, otherwise the thermostat will be replaced.

4: Change the water pump. The water pump is the most expensive and will have to be replaced in the end. After driving for a long time, the fan blades of the water pump are broken, dropped or blocked. Once I saw with my own eyes that there were many rubber strips twisted in the water pump of my car. The pump is not working well and can't circulate water, which leads to the rapid rise of water temperature. This requires replacing the water pump.

If you don't get better after the above steps. . . . . . Then I can't think of another way for the time being. . . .

Question 2: What caused the high water temperature in the car? The high water temperature of the engine (without water shortage) is mainly caused by the following aspects. First, the system is dirty and stuck in the radiator water tank. Second, the machine is blocked, such as the thermostat is not easy to use or damaged, and the water pump is not easy to use. Third, air resistance and engine failure cause high pressure in the cylinder to enter the cooling system. Fourth, the heat dissipation is not good, such as the low speed of the cooling fan. The wind ring is damaged and the surface of the water tank is dirty. Fifth, there is a phenomenon that the cooling fan is turned on late in cars using electronic fans. It is the main reason for the high water temperature of the car. The problem of turning on the electronic fan can be solved by using (engine anti-high temperature oil-saving protector). Taobao. Search and buy. In particular, it is pointed out that the reasons for the high water temperature of air conditioning are: Turning on the air conditioner is equivalent to adding a hot plate in front of the water tank. The cooling fan cools both the water tank and the condenser. If the water temperature is not lowered in advance, it is difficult to lower the temperature of the water tank and condenser at the same time when the air conditioner is turned on. Therefore ... it is very important to lower the water temperature in advance.

Question 3: Simply answer the reason why the water temperature of the cooling system is too high: the fan drive belt slips, breaks or the angle of the fan blade is incorrect; Fan clutch failure; The shutter opening is not enough; The radiator pipe is blocked, the radiator is dumped too much or the ventilation gap of the radiator pipe is blocked by dirt; The thermostat valve is not open enough or can't be opened; Excessive scale deposition in the system; Fuel injection or ignition time is too late; The ambient temperature is too high; The mixture is too thick or too thin; The engine is overloaded or overloaded for a long time.

Question 4: What is the reason for the high water temperature? Abnormal indication of vehicle water thermometer can usually be divided into two situations ―― the water temperature is always low and the water temperature is too high. Let's talk about the possible problems in two situations. Possible influencing factors when the water temperature is too high: 1. The water tank fan does not turn: The easiest way to check whether the water tank fan works normally is to turn on the air conditioning and refrigeration system of the vehicle. If the air conditioner compressor has been started and the fan is not running, the fan must be out of order; Some vehicles (many American cars) will let the fan run by itself when the water temperature sensor is disconnected to protect the engine. For this kind of vehicle, you can unplug the water temperature sensor to judge. 2. Poor heat dissipation of radiator: This situation mostly occurs in April and May when there are more catkins and cotton wool. When checking, just open the hood to see if the radiator behind the bumper is mixed with too many foreign objects. If the radiator is too blocked, you need to go to the repair shop to clean it. 3. The thermostat can't open normally. In this case, the coolant can't circulate normally, and it can't play a cooling role at all, mainly because the water tank and return pipe are at room temperature (it should be hot under normal circumstances), and the upper and lower water pipes will become hard at this time due to the expansion of gas in the water pipes. 4. Insufficient coolant: This is a relatively easy situation to observe. Just open the engine compartment and observe whether the coolant level meets the requirements. 5. Poor working of water pump: Sometimes the water pump belt will slip and idle due to too long use. The most important feature of this problem is that it will return to normal after stepping on the accelerator for a period of time. 6. Abnormal water temperature sensor, instrument and circuit: If the above problems have been eliminated, the high water temperature may be caused by the failure of water temperature sensor, instrument and circuit, so it is necessary to go to the maintenance station for detailed inspection in time. The possible faults when the water temperature is low are relatively simple compared with those when the water temperature is high. The main reason for the low water temperature is that the thermostat is always on. Its main performance feature is that the water thermometer shows that everything is normal from the beginning. When the vehicle is driving, the water temperature is getting lower and lower with the driving process of the vehicle. At this time, the thermostat must have been on all the time.

Question 5: What is the reason for the high water temperature of automobile engine? How to solve it? 1. After the hot car starts, check the backwater of return pipe at the top of the antifreeze storage tank. If the backwater is not smooth or blocked, the water temperature will be too high.

Reminder: Do not blindly disassemble and replace parts during maintenance.

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

Reminder: usually pay attention to wipe the dust between the condenser and the water tank.

3. 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, it is necessary to check the opening of the thermostat and whether the pump slows down.

Reminder: the temperature difference between the upper and lower water pipes of the water tank should not be too large.

4. Due to the irregular addition and replacement of antifreeze, the engine water channel and water tank will be blocked in advance, resulting in high water temperature. Antifreeze should be replaced once every two years, and original fittings must be used when replacing and adding.

Reminder: After water is added to the engine cooling system, or the concentration of antifreeze added exceeds 60%, the water temperature will be too high.

5. The high pressure at the high pressure end in the air conditioning system is too high; Excessive filling of air conditioning refrigerant or air conditioning refrigeration lubricating oil; The self-regulating function of the internal self-regulating air-conditioning compressor fails, resulting in high pressure; Also, the air conditioner condenser is blocked, which will increase the load of the engine.

Consume the cooling performance of the cooling system to prevent the failure of high water temperature.

Reminder: Too little or too much refrigerant in air conditioner will reduce the refrigeration effect.

Question 6: Why is the engine water temperature high? There are three situations that can cause high water temperature. 1. The thermostat doesn't work. The thermostat is made of memory metal (the principle will not be detailed). At normal temperature, the valve of the thermostat is closed, so when the vehicle is started, the cooling water will not circulate in the waterway. When the water temperature of the cooling water in the waterway reaches 60 degrees Celsius, the memory metal begins to deform, and the valve driving the thermostat opens it. When the water temperature reaches 82.5 degrees Celsius, the valve of the thermostat should be fully opened, and then the cooling system will work normally. Because the thermostat can't be opened or fully opened, the cooling water can't exchange heat normally, resulting in high water temperature. The water pump is out of order. The water circulation in the cooling system can only be carried out by the operation of the water pump. When the water pump does not operate or operates abnormally, the water temperature will rise. 3. The cylinder gasket is damaged. Because the cylinder pad is between the cylinder block and the cylinder head, there are oil passages and cooling water passages in the middle. Once the cylinder gasket is damaged, for example, the combustion chamber and water channel are broken, when the engine is working, the flame will run into the cooling system and overheat the cooling water, resulting in high water temperature.

Question 7: What is the reason for the high water temperature in cars? Important things are: ignition system failure, water pipe rupture, water tank inverted, water temperature probe damage, water pump damage, electronic fan circuit failure or constant temperature fan hydraulic failure, all of which will affect the water temperature. Driving in winter is basically the same as driving in summer. It's just that the outside weather often lowers the temperature when the water is hot, and it often raises the temperature when it is cold to supplement the constant temperature charging of the engine. All these are automatically controlled by the thermostat. Low-speed driving will not have much impact on normal water temperature, only.

Question 8: Several reasons for high engine water temperature. In hot summer, the engine cooling system is prone to failure, which is manifested in high water temperature and the pointer of the water thermometer reaching the red line, which seriously affects safe driving. There are several reasons for the high engine water temperature: 1. The cooling fan does not rotate. The cooling fan can be controlled by a temperature control switch; It can also be controlled by a water temperature sensor. 2. Insufficient cooling medium. (1) antifreeze: high-end cars are required to be filled with antifreeze all year round; ② Water or distilled water: temporary substitution; ③ The water tank cover leaks. The thermostat is broken. (1) If the thermostat is to be removed, the small circulation should be blocked at this time to ensure that the coolant is completely dispersed by the water tank; (2) When installing a new thermostat, pay attention to the water hole, such as Santana, there is no water hole. At this time, a hole should be drilled with a 6mm drill. One function is used for marking; Another function is that when the car heats up, it will produce the temperature difference between the two sides of the thermostat, so that the thermostat can be opened accurately with the water temperature. The water tank is blocked. ① External blockage should be removed by water or gas; (2) Internal blockage will affect the circulation of coolant and generate pressure at the same time. At this time, there will be two results, one is that the water tank leaks, and the other is that the water temperature is particularly high when driving at high speed. 5. Pump failure. ① The timing belt is broken due to slipping or sticking of the impeller; ② Impeller deformation. 6. Cylinder corrosion. (1) When the combustion chamber collides with the waterway, it will drain water or discharge white smoke from the drain pipe, resulting in frequent water shortage in the water tank; (2) The waterway collides with the oil path (the oil with water is white); (3) The collision between waterways leads to poor heat dissipation of the cylinder block, especially at high speed; ④ The waterway is blocked. 7. Incorrect ignition timing (corrected by timing light) and high oil pressure.

Question 9: What is the reason for the high indication of automobile water thermometer and how to maintain it?

Several reasons:

1, fan or temperature control switch failure;

2. The instrument is damaged;

3. Water shortage

4. The engine oil is insufficient

5. Cylinder pad ablation.

6 Other circumstances

FYI

Question 10: What is the reason for the high water temperature of large trucks? There are many reasons for the high water temperature of cars, most of which are caused by water seepage in water pipes and insufficient cooling water. Common ones are: broken fan belt, water tank or water pipe leakage, thermostat failure, oil leakage, etc. If the engine power disappears or sounds such as violent knocking and cylinder knocking are heard when the car is driving, it is mostly because the engine is overheated. The specific reasons are as follows (1): the cooling fan does not turn. The cooling fan can be controlled by a temperature control switch; It can also be controlled by a water temperature sensor. (2) Insufficient cooling medium. (1) antifreeze: high-end cars are required to be filled with antifreeze all year round; ② Water or distilled water: temporary substitution; ③ The water tank cover leaks. (3) The thermostat is damaged. (1) If the thermostat is to be removed, the small circulation should be blocked at this time to ensure that the coolant is completely dispersed by the water tank; (2) When installing a new thermostat, pay attention to the water hole, such as Santana, there is no water hole. At this time, a hole should be drilled with a 6mm drill. One function is used for marking; Another function is that when the car heats up, it will produce the temperature difference between the two sides of the thermostat, so that the thermostat can be opened accurately with the water temperature. (4) The water tank is blocked. ① External blockage should be removed by water or gas; (2) Internal blockage will affect the circulation of coolant and generate pressure at the same time. At this time, there will be two results, one is that the water tank leaks, and the other is that the water temperature is particularly high when driving at high speed. (5) Water pump failure. ① The timing belt is broken due to slipping or sticking of the impeller; ② Impeller deformation. (6) Cylinder erosion. (1) When the combustion chamber collides with the waterway, it will drain water or discharge white smoke from the drain pipe, resulting in frequent water shortage in the water tank; (2) The waterway collides with the oil path (the oil with water is white); (3) The collision between waterways leads to poor heat dissipation of the cylinder block, especially at high speed; ④ The waterway is blocked. (7) Incorrect ignition timing (corrected by timing light) and high oil pressure.