A friend asked, “Why are light trucks always hot?” According to this friend, even in winter, when the temperature has begun to drop, high temperatures will still occur. Let’s analyze this question today.

What are the reasons for high temperatures in light trucks?

Light trucks are always hot, which is actually because the water temperature of the engine is too high. And not only in summer, in the cool autumn and even the cold winter, there is a chance that the water temperature will be high, and many times it is caused by the following reasons.

1. Insufficient coolant

The coolant will be lost in daily use. If the coolant is insufficient, it will not be able to cool the engine well, making the engine hotter and hotter and unable to work normally.

2. Dirty radiator

The surface of the radiator will adhere to dust and dirt during driving, which will hinder the smooth flow of air between the fins and greatly affect the heat dissipation efficiency.

3. Failure of cooling fan

The cooling fan takes away the heat of the coolant in the radiator by increasing the force of sucking in external air. If the fan cannot operate normally, the coolant cannot be cooled. In addition, the failure of the spiral bimetallic temperature sensor on the front cover of the fan will also affect the start and stop effect of the fan.

4. Damage to the thermostat

The thermostat will switch the large and small circulation ranges according to the high and low temperature of the coolant, adjust the amount of water entering the radiator, and ensure that the cooling system is placed in a suitable mode for heat dissipation. When the thermostat fails, the valve will fail to work. If the large circulation cannot be opened on time, the heat dissipation capacity of the entire cooling system will be limited, causing the engine temperature to continue to rise.

5. Failure of the circulating 

The circulating water pump will exert pressure on the coolant to circulate in the cooling system. During use, there is a certain probability that the pump shaft will wear, the impeller will break, the rubber sealing ring will age and deform, and the water seal seat cavity will wear, resulting in slow and unsmooth coolant circulation and insufficient circulation pressure.

6. Blockage of water tanks and pipelines

Some truck drivers add some tap water for emergency when the coolant is insufficient. If there are more impurities in the water, scale will form in the water tank or pipeline over time, blocking the flow of coolant and affecting the circulation efficiency of the coolant.

What should I do when the water temperature is high?

When the vehicle prompts the water temperature alarm while driving, you should slow down immediately and pull over. You cannot turn off the engine directly at this time. Because when the water temperature is too high, the temperature of parts such as pistons, steel walls, cylinders, crankshafts, etc. is higher than the normal working temperature and is in an expanded state. If the engine is turned off at this time, it may cause mechanical jams and increased wear after cooling, and even cause cylinder sticking, making the engine unable to work normally.

If you can’t turn off the engine, can you use cold water to cool the engine? The answer is no. Because when the engine temperature is very high, it will be more dangerous to pour cold water on it. When an ultra-high temperature engine encounters cold water, it will deform and crack due to sudden cooling. In severe cases, it will cause the cylinder head or cylinder body to explode, endangering people around.

The correct way is to let the engine cool naturally at idle speed. If the temperature is still very high, you can try to pour water on the radiator to cool it down. After the engine has stabilized for a while, wear gloves, place a damp towel on the radiator cap, and gently open it slightly to allow the hot steam to escape. Once the radiator pressure has dropped, check to see if you need to add soft water or coolant.

Conclusion

High engine water temperature can lead to reduced engine power, economy, reliability, durability, and emissions. To avoid this, regularly inspect and maintain your vehicle to keep it in optimal working condition. If you need to replace engine parts during maintenance, please contact us for purchase. We offer a wide range of construction machinery products and related spare parts. We welcome your inquiries!

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