The engine is like the heart of a car. It's very important. Mainly working in the construction of engineering vehicles, usually pull heavy work environment is poor, encounter the engine overheating situation how?
There are two main reasons for the high temperature of the diesel engine: first, the cooling system does not give strength; second, the engine itself is out of order. So how to determine exactly what's wrong? Card friends can start to check from the following points.
Check coolant
The reason for the high working temperature of diesel engine is the lack of coolant. When the diesel engine is working, it will produce a lot of underutilized heat, which will gather on the engine parts. If the coolant is insufficient, even if everything else is normal, the cooling effect is not enough
Check thermostat
Generally, when the thermostat valve is at 78-88 ℃, it will open gradually as the temperature of the diesel engine increases gradually, and more and more coolant will participate in the large cycle cooling of the engine. The main faults of thermostat are that the main valve can not be fully opened or stuck between large and small cycles, aging, leakage of expansion body due to poor sealing, etc. these faults will lead to poor cooling water circulation and engine overheating.
Check the oil quantity
Because the temperature of diesel engine is higher, the requirement of heat dissipation and lubrication performance of engine oil is higher. Once excessive oil is added, the engine will encounter greater resistance during operation. If the engine oil is added less, it will affect lubrication and heat dissipation, so when changing the engine oil, it must follow the requirements, not more is better.
Check fan
Nowadays, the silicon oil clutch fan, which is widely used in heavy truck, can adjust the speed through the change of temperature. Its key control component is the spiral bimetal sheet temperature sensor on the front cover of the silicon oil fan. If it breaks or fatigue fails, it will directly cause the cooling fan to stop or run at a low speed, which will affect the engine cooling. Similarly, for other cooling fans using belt link, check and adjust the tightness of the belt to ensure the speed of the fan.
Check the oil filter element
Due to the operation of diesel engine, it is inevitable to produce some metal wear debris. In addition, the entry of impurities in the air and the production of oil oxides make the impurities in the oil gradually increase. In order to save tens of dollars, many people use the inferior filter, which is not only easy to block, lose the function of intercepting impurities in the engine oil, but also aggravate the wear of other parts such as cylinder block. As a result, it is not worth the loss.
Check your own workload
▲ emergency measures after high temperature of engine
It goes without saying that everyone knows this. When the engine works under heavy load, it will produce more heat, especially when the heavy-duty dump truck climbs the slope, it is very easy for the water temperature to be too high. If it is often like this, caryou should pay attention to the fact that the service life of the engine will be greatly reduced when it is in such a working state for a long time, so it is necessary to stop at the right time and do what you can.
In fact, the engine "fever" is often caused by many reasons. Many of the low-level problems can be avoided through daily inspection. The maintenance of a car is not a trivial matter. In case of failure, we must quickly go to the local Jianghuai light truck service station for detection!