1: Check whether the water tank leaks, open the water tank to see if the water level is below MIN, if the water level is very low, it is likely to leak. Add water, open the exhaust screw near the engine to exhaust and check the water leakage point. Air in the water tank will also cause high water temperature. Water leakage is usually caused by a cold car, so check it after the hot car cools down, and pay attention to whether there is any leakage in the warm water pipe joint leading to the driver's cabin. When you get up in the morning with a large amount of water leakage, you will know by looking at the ground below the car. If there is no water leakage point, but the water gradually falls below the lowest point after being filled with water for a 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 is any foam and bubbles, see if there is any oil on the water tank cover, and see if there are any white water drops on the oil dipstick. If there is, water is seeping in. Need to change the cylinder gasket.
2: change the water temperature sensor. If you don't boil the pot, it just shows that the water temperature is high, or it may be caused by the inaccurate water temperature sensor. Change the water temperature sensor.
3: change the thermostat. When the thermostat doesn't open, the cold and hot water don't circulate. When the water temperature reaches 9 degrees, open the cabin cover and touch the water pipe near the engine (be careful). If the water tank is not hot, it means that the water doesn't circulate. It's hot on both sides Otherwise, the thermostat will be replaced.
4: change the water pump. The water pump is the most expensive, so you have to change it last. After driving for a long time, the fan blades of the water pump were broken, dropped or blocked. I once saw with my own eyes that there were many rubber strip-like things twisted in the water pump of my car. The water pump was not working well and could not circulate water, causing the water temperature to rise rapidly. This requires replacing the water pump.
if it doesn't get better after the above steps. . . . . . Then I can't think of another way for the time being. . . .
question 2: what causes the high water temperature in the car? The high water temperature of the engine (on the premise of no water shortage) is mainly caused by the following aspects. First, the system is dirty and blocked inside the water tank of the heat radiator. Second, the machine is blocked, such as the thermostat is not working well or damaged, and the water pump is not working well. Third, air resistance and engine failure lead to high pressure in the cylinder entering the cooling system. Fourth, poor heat dissipation, such as low speed of cooling fan. The wind ring is damaged and the surface of the water tank is dirty. Fifth, cars using electronic fans have the phenomenon that the cooling fans are turned on late. 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 reason for the high water temperature of air conditioning is; Turning on the air conditioner is equivalent to adding a hot plate in front of the water tank. The cooling fan cools the water tank and condenser at the same time. If the water temperature is not lowered in advance, it is very difficult to lower the temperature of the water tank and condenser at the same time when the air conditioner is turned on. So ... It is very important to lower the water temperature in advance.
question 3: briefly answer the reason why the water temperature in the cooling system is too high: the fan drive belt slips, breaks or the angle of the fan blade is incorrect; Fan clutch failure; Insufficient shutter opening; The radiator water 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 cannot 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 rich or too thin; Long-term heavy load or overload operation of the engine.
question 4: what is the reason for the high water temperature? The abnormal indication of the vehicle's 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 is operating normally is to turn on the air conditioning refrigeration system of the vehicle. If the air conditioning compressor has been started and the fan is still not operating, the fan must have failed; Some vehicles (many American cars) will let the fan run by itself to protect the engine when the water temperature sensor is disconnected. For such vehicles, the water temperature sensor can be unplugged to judge. 2. Poor radiator cooling: This kind of situation mostly occurs in April and May when there are many catkins and cotton wool. When checking, you only need to 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 for cleaning. 3. The thermostat can't be opened 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 very hard at this time due to the gas expansion 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 the water pump: Sometimes the water pump belt will slip and idle due to too long use. When this problem occurs, the most important feature 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 or instrument and circuit, so it is necessary to go to the maintenance station for detailed inspection in time. The possible fault when the water temperature is low is relatively simple compared with the high water temperature. The main reason for the low water temperature is that the thermostat is always open. Its main performance feature is that the water thermometer shows that everything is normal at 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, it must be caused by the thermostat being always open.
question 5: what is the reason for the high water temperature of the automobile engine? How to solve it? 1. After the hot car is started, check the return pipe backwater 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 disassemble and replace parts blindly 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, you need to check the opening of the thermostat and whether the water pump has lost speed.
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. The antifreeze is replaced once every two years, and the original accessories must be used when replacing and adding.
reminder: after water is added into the engine cooling system, or the concentration of antifreeze added exceeds 6%, 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-adjusting function of the internal self-adjusting air-conditioning compressor fails, resulting in high pressure; There is also the blockage of the air conditioner condenser, which will increase the load of the engine, < P > consume the heat dissipation performance of the cooling system, and lead to the failure of high water temperature.
reminder: too little or too much refrigerant in air conditioner will reduce the cooling effect.
question 6: why is the engine water temperature high? There are three situations that can cause the failure of high water temperature. 1. The thermostat fails. The thermostat is made of memory metal (the principle will not be elaborated). At normal temperature, the valve of the thermostat is closed, so when the vehicle is started, the cooling water does not circulate in the waterway. When the water temperature of the cooling water in the waterway reaches 6 degrees Celsius, the memory metal begins to deform, driving the valve of the thermostat to open 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. 2. The water pump fails. 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. cylinder gasket is damaged. Because the cylinder gasket is between the cylinder block and the cylinder head, there is an oil channel and a cooling water channel in the middle. Once the cylinder gasket is damaged, for example, the combustion chamber and the water channel are broken down, when the engine is working, the flame will run into the cooling system, heating the cooling water excessively, resulting in high water temperature.
question 7: what are the reasons for the high water temperature in automobiles? The important things are: the ignition system is out of order, the water pipe is broken, the water tank is plugged backwards, the water temperature probe is damaged, the water pump is damaged, the electronic fan circuit is out of order or the thermostatic fan hydraulic pressure is out of order, which will affect the water temperature. There is basically no difference between driving in winter and driving in summer. It's just that the temperature is often reduced when the external weather affects the water heat. When it's cold, it's often heated as a constant temperature charge for the engine. This is all automatically operated by the thermostat. Driving at low speed and low speed will not have much influence on the normal water temperature, only when the traffic jam is reversed, the water temperature will be too high or the engine at low speed and high speed will easily occur.
Question 8: Several reasons for the high water temperature of the engine. In hot summer, the engine cooling system is prone to failure, which is characterized by high water temperature and the pointer of the water thermometer reaching the red line, seriously affecting safe driving. There are several reasons for the high water temperature of the engine: 1. The cooling fan does not turn. The cooling fan may be controlled by a temperature control switch; It may 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 Water tank cover leaks. 3. The thermostat is damaged. (1) If you want to remove the thermostat, you should plug the small circulation at this time, so as to ensure that the coolant is completely dissipated by the water tank; (2) when installing a new thermostat, attention should be paid 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 for marking; Another function is that when the car is heating up, the temperature difference between the two sides of the thermostat will be generated, 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 cooling liquid 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 erosion. (1) The combustion chamber collides with the waterway, which will drain water or discharge white smoke from the drainage pipe, resulting in frequent water shortage in the water tank; (2) the water channel collides with the oil channel (the oil is white with water); (3) The collision of water channel and water channel causes bad heat dissipation of cylinder block, especially at high speed; ④ Waterway blockage. 7. Incorrect ignition timing (corrected by timing light) and high oil pressure.
Question 9: What is the reason why the indicator of the automobile water temperature meter is too high and how to maintain it?
Several reasons:
1. The fan or temperature control switch fails;
2. The instrument is damaged;
3. Water shortage
4. Engine oil shortage
5. cylinder gasket ablation
6 Other situations
For reference
Question 1: What is the reason for the high water temperature of large trucks? There are many reasons for the high water temperature of automobiles, most of which are caused by water pipe seepage and insufficient cooling water. The 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 turned out 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 may be controlled by a temperature control switch; It may 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 Water tank cover leaks. (3) The thermostat is damaged. (1) If you want to remove the thermostat, you should plug the small circulation at this time, so as to ensure that the coolant is completely dissipated by the water tank; (2) when installing a new thermostat, attention should be paid 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 for marking; Another function is that when the car is heating up, the temperature difference between the two sides of the thermostat will be generated, 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 cooling liquid 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) The combustion chamber collides with the waterway, which will drain water or discharge white smoke from the drainage pipe, resulting in frequent water shortage in the water tank; (2) the water channel collides with the oil channel (the oil is white with water); (3) The collision of water channel and water channel causes bad heat dissipation of cylinder block, especially at high speed; ④ Waterway blockage. (7) Incorrect ignition timing (corrected by timing lamp) and high oil pressure.