The winter is getting closer to the top four engines

In September, this time is the most beautiful and comfortable time for most parts of the country. However, there are exceptions. Due to the vastness of our country, the autumn tigers in the south have not yet left. In some parts of the north, we have already seen the shadows of winter. Even in some places, the night temperature is close to zero. Like the hot summer, low temperatures are constantly testing the cooling system of us and our trucks, especially the engines.

● Engine temperature is too high too low

There may be a card friend who believes that the engine is most afraid of high temperatures, but it is not a matter of low temperature, and even some cardmates believe that the lower the temperature of the engine coolant, the better. In fact, this view is wrong, the engine is really afraid of the coolant temperature is too high, but also afraid of the coolant temperature is too low. For our current common diesel engine, the normal coolant temperature is around 80 degrees Celsius. If the coolant temperature is too low, it will cause high engine oil consumption and wear. If your car temperature is difficult to reach normal levels, please refer to the following reasons.

First, thermostat failure

The role of thermostat is to control the engine coolant temperature within a normal range. When the temperature is low, the thermostat closes the large circulation channel of the coolant and only allows the coolant to circulate inside the engine without passing through the radiator, thus ensuring that the coolant temperature is within the normal range; when the temperature is high, the thermostat will be large. The cycle is turned on, and the high-temperature coolant flows to the radiator to dissipate heat and prevent the engine from overheating. If the thermostat's operation is abnormal, it can only work in the large-cycle mode, and the engine coolant temperature will appear too low.

Second, artificially remove the thermostat

In the hot summer months, the engine is easily heated, so some card members like to remove the thermostat. With the end of the summer, the temperature is getting lower and lower, there is no control of the thermostat, the engine coolant is in a large-cycle full heat dissipation mode for a long time, which causes the coolant temperature to be difficult to reach the standard, so the card-friend of the thermostat is dismantled. Remember to put the thermostat back.

Third, fan clutch failure

The current trucks are equipped with fan clutches to save fuel and energy. Its function is to control the fan not to work or to operate at a lower speed when the engine coolant temperature is too low, and to control the fan to dissipate heat when the coolant temperature is too high. If the fan clutch fails, it will cause the engine coolant temperature to be too low if it is in the full heat dissipation mode (especially the electromagnetic fan clutch) for a long time, or if the fan clutch is artificially locked after the failure. In addition, fans that work full-time consume a lot of power, which means they consume more fuel.

Fourth, radiator heat dissipation area is too large

The radiator heat sink area of ​​the truck has a perfect match with the engine. Normally, this will not cause high temperatures. However, due to the frequent occurrence of high temperatures in summer due to various other reasons, there has been no correct maintenance and eventually forced some of the card-friends to opt for a radiator with a larger heat-dissipation area to relieve the high engine temperature. The end result is that although the engine is not hot in summer, it also causes the temperature of the engine coolant in winter to hardly reach the ideal range.

● Postscript

A truck is a complete whole consisting of many systems. Any problem in any one link may lead to unpredictable consequences. This is similar to our human body, because the body's normal body temperature must be within a certain range, too high or Too low can have very serious consequences. We hope that everyone can maintain their own car and prevent it from experiencing "low body temperature".

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