Just entering the hot weather, many cities across the country seem to have activated the "stove" mode, and the scorching summer has also posed a severe test for the use of vehicles. Many car owners have found that the temperature of the vehicle's water temperature gauge continues to rise during driving, fearing that the engine may overheat and cause the vehicle to self ignite.

In fact, as long as the vehicle engine works normally, even in hot summer, its temperature will not change with the rise of the external temperature, but will float within the set temperature range, generally between 85 ℃ -95 ℃, usually about 90 ℃. But in summer, the engine heats up quickly, and the process of entering the big cycle is faster, and the Computer fan will start more frequently.

Car owners can also determine the engine temperature through the water temperature pointer on the dashboard. Generally, a red area is marked on the bottom side of the water temperature gauge to indicate the high temperature zone. If the water temperature pointer approaches or reaches this range, the owner should pay attention. At this time, if the water temperature is too high, it may have an impact on the vehicle.

If this problem occurs while driving, the first thing the car owner needs to do is to slow down and pull over while ensuring safety. After the engine cools down, restart the vehicle. If the water temperature frequently exceeds 95 ℃, it is considered a vehicle malfunction and the vehicle should be taken to the nearest repair shop for repair. Don't believe the so-called "speeding up and driving fast can cool down" approach, as it will only generate more heat from the engine and cannot be dissipated, causing greater damage to the engine.

In general, the main reasons for the high temperature of the vehicle engine are as follows. The Darong axle is simply summarized:

1. Loss of coolant

Coolant, commonly known as "antifreeze", some car owners think its function is only antifreeze, so they don't pay much attention to it in summer. In fact, it also has the functions of cooling, antifreeze and anti boiling, which is also essential in summer.

Some car owners prefer to use water instead of coolant. Due to the different boiling points of the two, if only adding water, the water tank will boil as soon as the engine temperature rises slightly, damaging the engine, forming scale and oxide, blocking the radiator and watercourse, which is not worth the loss.

When the engine water temperature is too high, we can check the coolant level by ourselves. If it is lower than the minimum scale, it should be added in time. If the water temperature continues to be too high after adding, check the cooling liquid level again. If the liquid level drops, it indicates that there is a leakage of coolant, which must be handled as soon as possible.

It is worth noting that even if the coolant is not missing, the vehicle owner should also observe whether the cooling is beyond the validity period. Generally, the validity period of the coolant is about two years. If it exceeds the validity period, its performance will decline, not only will it not play an effective role, but also will rust the system parts. Therefore, it is recommended to replace it all.

2. Thermostat fault

Thermostat is an automatic temperature regulating device of the vehicle. Its main function is to control the flow speed of coolant and the amount of water entering the radiator. By changing the water circulation range, it can adjust the heat dissipation capacity of the cooling system and maintain the engine temperature within the set range. If the vehicle has no abnormal performance in antifreeze and water tank, but the water temperature is too high, the culprit is likely to be thermostat failure.

How to check whether the thermostat is faulty? The thermostat can be removed and heated in water. Generally, the temperature at which the valve starts to open is about 80 ° C, and the temperature at which it fully opens is generally about 90 ° C. the lift of the valve is generally 7~10mm. As long as its performance meets the above standards, it can continue to be used. Otherwise, replace the thermostat with a new one.

3. Radiator blockage

Especially after spring and summer catkins, poplar catkins, fallen leaves and flying insects, the car mainly observes whether the radiator at the front of the car is covered and blocked. If this phenomenon exists, you can handle it yourself.

After removing the air inlet grille, flush it directly with large flow of water. Note that the spray pressure should not be too large, and the spray direction should be as vertical as possible to the water tank to avoid damaging the radiator fins.

4. Cooling fan failure

When the vehicle speed is too low, the cooling fan will start working to assist the engine to cool down. When the cooling fan fails, the water temperature will naturally be abnormal.

In addition, you can also observe the belt tightness of the lower cooling fan. If it is too loose, it will lead to insufficient rotation speed of the fan and water pump, and it will not provide sufficient cooling effect.

5. Dirty water channel of cylinder block

This is also one of the reasons for the overheating of the engine water temperature. The dirty cooling water channel of the cylinder block, such as scale adhesion and dust blockage, will lead to smaller water flow, affect the water circulation efficiency, make the coolant unable to play a role, and cause the engine water temperature to be too high. As the cooling water channel of the cylinder block is inside the engine, it is difficult to clean it. In addition to finding a professional repair shop, it is also critical not to choose low-quality antifreeze at ordinary times.