What causes the sudden high engine temperature during car operation?

1. When the engine temperature is too high, you can use your hand to touch the temperature of the upper water pipe and the lower pipe to judge, if the temperature difference between the two water pipes is large, you can judge that the thermostat is not working, if you can't buy accessories on the way, you can remove the thermostat for emergency, and replace it immediately after going home.

2. If there is air in the cooling system, it will form air resistance, which will make the cooling water circulate poorly, resulting in high engine temperature. The following methods can be used to deflate: let the engine run at high speed, gently unscrew the water tank cover until the gas is just released, at this time, some cooling water will flow out with the gas, and so on many times until you feel that the gas is exhausted (at this time, touch the upper and lower pipes with your hands, and the temperature will be significantly different from before the gas).

After troubleshooting, the cooling water should be replenished in time.

3. If the vehicle is driving on a dirt road or muddy road for a long time, there will be some dirt adhering to the radiator, which will affect the heat dissipation effect over time and cause the water temperature to be too high. In this case, you can blow the radiator grid with compressed air first.

4. If the temperature is too high or the temperature indicator light keeps flashing, stop to check whether the cooling water of the water tank is normal, and whether there is leakage at the water tank and water pipe. If no abnormality is found through inspection, you can continue driving after replenishing the cooling water. If the temperature is still too high after driving a certain distance, and the cooling water is reduced after stopping for inspection, this is mostly due to the loss of sand hole or perforation in the water jacket of the cylinder block.

5. In the process of driving, if the water temperature is too high, it must not be washed with cold water, so that the cylinder may break; You should also not rush to open the lid of the water tank, so as not to hurt people with boiling hot water. Turn off the heat and wait for about 20 minutes before opening the lid of the water tank and adding cold water for emergency.

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.

Here are a few cases where the engine temperature is too high as follows:

1. Fan failure. The failure of the fan affects the normal operation of the fan, and the specific reasons include the electromagnetic clutch of the fan or the control and switch of the fan motor, which is too late in time and closes too early; The fan never turns; The fan silicone oil high compatifier failed.

2. Insufficient coolant. The coolant is insufficient, and the internal consumption is too large. The main reason is the damage of the cylinder potential.

3. The coolant circulation 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.

Consider a few aspects,1A leaky water tank leads to a lack of antifreeze.

2.The electronic fan does not rotate.

Then you need to check it, there are many reasons for the high water temperature, and you need to check it specifically.

It must be that the cooling system is malfunctioning, or the thermostat is broken and the water is blocked, causing the water to not circulate, or the pump is broken, or the cylinder gasket is broken.

Is the coolant enough, and the water pump belt is broken? Whether the fan is working properly.

Causes of high engine temperature and how to deal with them.

Causes of high engine temperature and how to deal with them.

1. The thermostat is broken, and the large circulation of coolant cannot be opened at the set temperature;

2. The coolant of the engine cannot be circulated through the water tank to dissipate heat;

3. The power of coolant circulation is gone, usually because the water pump is broken;

4. There is air in the cooling system;

If the vehicle is driving on dirt roads or muddy roads for a long time, there will be some dirt adhering to the radiator, which will affect the heat dissipation effect over time, resulting in too high water temperature;

2. If the thermostat branch is not working properly, it will also cause the engine temperature to be too high. Generally, Douqing is judged by the temperature difference between the space connected to the thermostat and the small water pipe. If the temperature difference between the two water pipes is large, it can be judged that the thermostat is not working;

This situation should be that your cooling system is not activating, causing this temperature to be too high. When the temperature is low, the fan should not be activated.