What causes high engine temperatures?

1. Fan failure. The failure of the fan affects the normal operation of the fan, and the specific reasons include the late timing and premature shutdown of the temperature control switch of the fan electromagnetic clutch or the fan motor; The fan never turns; The fan silicone clutch failed.

2. Insufficient coolant. The coolant is insufficient, and the internal consumption is too large. The main reason is damage to the cylinder head gasket.

3. The circulating amount of coolant is too small. The specific reasons are: the failure of the pump wheel; Damage to the thermostat; There is too much limescale in the radiator or body waterway, and the cleaning is not timely.

4. The engine is working poorly. The main reasons are too late ignition, too thin mixture, too much carbon deposits in the combustion chamber, and engine deflagration.

5. The amount of lubricating oil is insufficient. It will make the moving parts not get enough lubrication, so that the friction resistance increases, the wear is aggravated, and the heat generation increases. At the same time, the temperature of the lubricating oil rises, and the viscosity of the corresponding lubricating oil decreases, which promotes friction, heating and poor heat dissipation, resulting in overheating of the engine.

6. Heater heat dissipation failure. The main reasons are: there are debris blocking between the heat sinks; deformation of the heat sink of the radiator; The inside of the radiator is clogged. The blinds cannot be fully opened;

7. The outside of the water tank is dirty or the internal scale is serious, resulting in poor heat dissipation, and the water tank needs to be opened (cleaned) or replaced;

8. The fan clutch is engaged too late or the cooling fan is not working, the fan rotation resistance is too large, the blades are installed in reverse, the blades are damaged, etc.;

9. The water pump belt is too loose;

10. There is a problem with three-way catalysis;

11. Caused by air and water in the phenomenon of "punch";

12. The thermostat is not opened well and needs to be replaced;

13. Other water pipes, elbows and water holes of the waterway are blocked;

14. The pump does not work well (the circulating water volume is not enough);

15. Excessive carbon deposition in the combustion chamber.

The high engine temperature is caused by many reasons, the normal working temperature of the engine is 85-95 °, if it exceeds 95 or more. It is considered that the temperature is high. The main causes of high engine temperature are as follows:

1) New engine or overhauled engine, the temperature is more than 95, to confirm that the temperature is high, first check the ignition time, check whether the cooling and cooling system is in good working condition, and whether the cooling pipeline is unblocked.

2) In normal use, if the temperature of the engine suddenly rises (more than 95 or more), check whether the thermostat is effective. The method of detecting the overflow is to remove the thermostat, put it in a suitable basin, add boiling water, and then heat, observe whether the thermostat hole is working, the temperature requirement is 83 to start opening, 95 is fully open for normal, if the water temperature exceeds 95 to l, the **valve is not opened.

Indicates that the thermostat is failing.

3) The damage of the water pump will also lead to high engine temperature, and the reason for the damage is that many users do not follow the requirements of the manufacturer, do not use anti-rust and anti-corrosion coolant in the cooling system, and fill with general water or inferior antifreeze, so that the waterway appears more serious rust and corrosion, and the impeller of many water pumps becomes smaller due to corrosion, resulting in a decrease in flow children, resulting in an increase in engine temperature. A large amount of water rust clogs the waterway, and the coolant flow rate is weakened, which makes the engine locally high and exacerbates the rise of engine temperature.

4) There are many drivers, after the occurrence of engine high temperature failure, do not check the reason for the high engine temperature: but casually remove the thermostat and do not use, so that the high temperature cooling water through the small circulation without the radiator directly back to the engine, resulting in the engine temperature rise.

There are many reasons why the engine temperature is too high, there are too many water pumps, cooling fans, clogged water tanks, thermostats, head gaskets, and so on.

There are several reasons why the engine temperature is too high:

1. Fan problem: The fan motor does not move or the fan clutch fails, which cannot be cooled down normally, resulting in bow|The engine is overheating.

2. Exhaust: The three-way catalytic converter is blocked or the tube is ruptured, resulting in the obstruction of the exhaust and the bowOverheating, the updated thermostat and the original temperature coefficient are different, causing the cause of failure.

3. Thermostat blockage: The thermostat can not switch normally is usually caused by mechanical failure or incomplete filling of the cooling system, and the updated thermostat is different from the original temperature coefficient, resulting in the cause of failure.

4. Coolant leakage: If the pipe of the cooling system is ruptured, the coolant will be lost and the heat dissipation will not operate normally. 5. Water pump: After the long-term use of the water pump is highly worn, the parts wear off and fall off.

If the engine wants to work normally, it needs to be maintained in the normal operating temperature range, if the engine temperature is too high or too low, it will affect the working condition of the engine. High engine temperature is a common fault, let's take a look at the causes of high engine temperature and how to deal with it:

Clause. First, there is a lack of antifreeze. Antifreeze is the most important heat dissipation medium for the engine cooling system, and if the antifreeze is too small, it will seriously affect the heat dissipation of the engine cooling system.

So the engine temperature is too high, and we need to check the coolant level and add it to the standard value after the engine has cooled down.

Clause. Second, the failure of cooling system components, such as electronic fan, water pump or thermostat failure, resulting in the failure of the heat dissipation system, which requires us to use a special detection computer for detection, and then according to the fault code, determine the fault location, replace or repair the damaged parts.

Clause. Third, the water tank is dirty, the water tank is an important part of the engine heat exchange, located in the front of the vehicle, catkins and other stolen goods are easy to adhere to the surface of the water tank, which will affect the heat dissipation of the water tank, and seriously will lead to the engine temperature is too high, it is recommended to clean the water tank once a summer.

Causes of high temperature of automobile engine: fan motor does not move or fan clutch failure; Three-way catalyst blockage or pipe rupture, resulting in exhaust blockage; Coolant leakage, resulting in coolant loss and heat dissipation can not work properly; The pump has a high degree of wear, and the parts are worn and peeled off; As well as the problem of the radiator cover.

The reasons for overheating of a car engine are as follows:

1. Fan problems, the fan motor does not move or the fan clutch is faulty, and it cannot be cooled normally;

2. Exhaust problems, three-way catalyst blockage or pipeline rupture, resulting in exhaust blockage, resulting in engine overheating;

3. Coolant leakage problem, if the pipeline of the cooling system is ruptured, resulting in coolant loss and heat dissipation can not work normally, this situation can be improved, as long as the new pipeline is replaced;

4. Pump problem, after long-term use, the pump has a high degree of wear, and the parts wear and fall off, and the only solution is to replace the new pump;

5. The problem of radiator cover, if the pressure of the radiator cover is not the same, it will cause the spring to loosen, and the cover is not tight and cannot be closed; The problem of clogged thermostat, the thermostat can not be switched on and off normally, usually caused by mechanical failure or incomplete filling of the cooling system, and the updated thermostat has a different temperature coefficient from the original, resulting in the cause of failure.

The engine temperature is too high, which may be due to the failure of the thermostat, or it may be due to the lack of antifreeze, which causes the engine to dissipate heat poorly, which is still harmful to the engine.

1.Not enough coolant.

2.The engine thermostat is broken.

3.The radiator is broken.

4.The cooling fan is broken.

5.The connector is broken.

Here's why.

1) The amount of coolant in the cooling system is insufficient, and there is leakage in the cooling system.

2) The fan belt slips or breaks, the temperature control switch or electromagnetic fan is damaged, and the fan clutch is engaged too late or damaged.

3) The main valve of the thermostat cannot be opened or opened too late, and the outlet pipe at the lower part of the radiator is frozen or blocked

4) The scale and rust deposited in the radiator and water jacket are too thick; The upper return pipe of the radiator is deflated or blocked; The water distribution pipe is rusty and the water distribution capacity is lost.

5) The pump efficiency is poor or the pump shaft is disconnected from the impeller.

6) The ignition time is too late, and the mixture is too thin or too thick. Excessive carbon deposits in the combustion chamber, engine knocking or premature ignition.

7) The cylinder liner is too thin or the joint surface of the cylinder block and cylinder head is ground too much.

8) Lack of oil, excessive oil thickness, aging and deterioration of engine oil, resulting in reduced lubrication and heat dissipation performance.

9) Overloading of the car, driving in low gear for a long time, climbing long slopes, driving for a long time in hot weather or plateau areas.

In the hot summer, the engine cooling system is prone to failure, which is manifested by high water temperature, and the water temperature gauge pointer reaches the red line, which seriously affects the safe driving.

There are several reasons for the high water temperature of the engine:

1. The cooling fan does not rotate. The cooling fan may be controlled by a thermostat switch; It may also be controlled by a water temperature sensor.

2. Insufficient cooling medium. Antifreeze: High-end cars are required to be filled with antifreeze all year round; Water or distilled water: temporary substitute; The water tank cover is leaking.

3. The thermostat is damaged. If you want to remove the thermostat, you should plug the small circulation at this time, so as to ensure that all the coolant is dissipated by the water tank; When installing a new thermostat, you should pay attention to the water hole, such as Santana does not have a water hole, at this time, a 6mm drill bit should be used to drill a hole. One function is to be used as a marker; Another function is that during the heating process of the car, the temperature difference between the two sides of the thermostat is generated, so that the thermostat is accurately opened with the water temperature.

Fourth, the water tank is clogged. External blockages should be removed with water or gas; Internal blockages affect coolant circulation and create pressure, which can result in two outcomes, one is a leaking water tank or the other is a particularly high water temperature at high speeds.

5. Pump failure. The impeller slips or gets stuck, causing the timing belt to break; The impeller is deformed.

6. Cylinder corrosion. The combustion chamber and the waterway are flushed, and at this time, the water will be drained from the drain pipe or white smoke will be discharged, resulting in a frequent shortage of water in the water tank; The waterway and the oil channel are flushed (the oil is white when there is water); The waterway and the waterway are rushed, resulting in poor heat dissipation of the cylinder block, especially at high speed; Blocked waterways.

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

There are several reasons for the high temperature of the engine:

1.The coolant is insufficient or the coolant quality is not good.

2.The thermostat failure could not be opened, and the engine was in a small cycle for a long time.

3. The inside of the radiator is blocked, or there are too many debris on the surface.

4.The cooling water channel is blocked.

Usually the engine temperature is high, the main reason is the lack of water in the tank or the poor water circulation. At this time, you can check whether there is a lack of water in the tank or whether the thermostat is damaged. Whether the fan blades are broken or not, these can cause high engine temperatures.

1.Leakage of water in the cooling system or insufficient cooling water;

2.The indication of the water temperature gauge is inaccurate or malfunctioning;

3.There is too much scale in the cooling system, and the heat dissipation effect is poor;

4.The radiator shield mesh or radiator core ventilation channel is blocked by debris, resulting in poor heat dissipation;

5.The belt of the water pump or fan is too loose or broken;

6.The water pump is damaged, the fan blades are reversed or deformed, and the wind ring is damaged;

7.The thermostat is damaged in the closed position of the main valve; 8.Long-term overload of the engine and late oil supply, etc.

There are many reasons, the more common ones are lack of antifreeze, thermostat aging and loss of effect, fan failure, circulation system is not smooth, etc., and it is not excluded that vehicle computer failure affects the high temperature of the vehicle engine, if the engine often has a high temperature alarm, it is recommended that you go to the 4S shop or some more reliable repair shops to thoroughly investigate the specific problems appear in **, the engine normal high temperature has a very large impact on the engine, which will shorten the service life of some parts inside the engine, Serious will cause engine damage or even replace the engine, so it is recommended that you carry out a system in time to troubleshoot the high temperature fault.

If the engine temperature is too high, it may be a lack of antifreeze or a faulty cooling system. For example, the water pump is broken, the fan does not rotate, and so on. It could also be that the radiator is too dirty and the heat dissipation effect is not good. It may be caused by a lack of oil or a long-term low-grade engine running at high speeds. Hope.

The main reasons for the high engine temperature are as follows: 1. Insufficient coolant, and the long-term water circulation during engine operation will cause the coolant of the engine cooling system to slowly lose, resulting in a lack of water in the water tank; 2. When the outer surface of the water tank is dirty or the inside is dirty, and the outer surface of the water tank is dirty or the inside is dirty, it will affect the heat dissipation of the water tank or the coolant circulation is not good, which will affect the heat dissipation; 3. The thermostat is damaged, if the thermostat is in a closed state when the thermostat is damaged, the coolant inside the engine is in small circulation, so that the coolant of the wheel in the water tank can not participate in the circulation and heat dissipation, resulting in the high water temperature when the vehicle is idle or low-speed driving, and the faster the speed, the higher the water temperature; 4. The water pump is the power source of coolant circulation, if the water pump is damaged, the coolant can not be circulated for heat dissipation, resulting in high water temperature.

The temperature of the engine is usually sensed by the water temperature sensor, so we tend to treat the normal temperature of the engine as the normal temperature of the water temperature. Usually 90 is the best, but the temperature of the engine is different under different working conditions, so the normal temperature of the engine is between 85-105C, and the best state is of course hovering around 90C. When we encounter an alarm that the water temperature is too high, we should first slow down, and then drive the car to the side of the road, don't rush to turn off the engine, because the water temperature is too high will cause the temperature of the piston, steel wall, cylinder, crankshaft, etc. to be too high.

The oil thins and loses lubrication. If the flame goes out at this point, the parts are in an expanded state and the gap between the parts is small. Some soft metals fall off after shutdown, and some even cause sticking to the cylinder.

The reasons for the high engine temperature are as follows:1The lack of antifreeze in the engine cooling system may be the leakage point of the engine, such as leakage of water pump, damage to pipelines, damage to the water tank, etc.; 2.

The thermostat in the engine cooling system failed, causing the water temperature to be too high. Because the thermostat cannot be opened, the coolant flow in the engine is blocked, so the coolant temperature is too high; 3.The cooling fan in the engine cooling system is not working properly, resulting in poor coolant cooling.

Therefore, the water temperature light is on, which causes the coolant temperature to be too high; 4.The engine cooling system water pump is faulty, and the water pump does not rotate smoothly, resulting in poor coolant flow, water temperature light on, and coolant temperature too high.