The overheating of an engine means that the temperature of the engine exceeds that of the highest temperature (80~90 C), and sometimes there is a boiling phenomenon. According to the main structure and cooling principle of diesel engine cooling system, the main reasons and methods of elimination are common.

1 insufficient cooling water causes diesel engine to overheat

The heat of the engine is mainly taken away from the heat by the cooling water and exudes. If the cooling water is reduced by the leakage or evaporation of the water tank and water pipe, the natural heat will be reduced and the heat will be overheated in the engine and the engine is overheated.

Judgment and elimination method

Check whether the North Baotou Mercedes Benz accessories water tank and external pipeline leakage, if leakage, indicating that the overheated engine is caused by leakage, should promptly eliminate leakage. If the water is not leaking, the radiator can be opened and the water cover is opened to observe whether the cooling water is sufficient. Most of it is due to the long time without adding cooling water to the engine overheating. It should be replenished in time.

2 the loose and skidding of the fan belt causes the cooling water circulation to slow down and overheat the engine.

The size of the cooling strength of the diesel engine depends on the speed of the fan. If the fan belt is loose and slippery, it will cause the decrease of the power transmission efficiency, the decrease of the speed of the fan, the decrease of the cooling strength, the drop of the speed of the pump and the reduction of the displacement, thus reducing the flow speed of the cooling water, and the heat can not be taken away quickly, guide can not be taken very quickly away, guide can not be taken very quickly. The diesel engine has a bad heat dissipation.

Judgment and elimination method

When the diesel engine stops working, use the hand to move the fan blade. If it can move the fan to slip, it is indicated that the northern Baotou Mercedes Benz fan belt is loosened by the loose fan belt and should be adjusted.

Refer to the technical specification for operation and maintenance manual carried by the engine to adjust the belt.

The failure of the thermostat leads to the bad heat dissipation

The thermostat is located at the outlet of the engine. Its function is to adjust the cooling strength. When the engine has a low temperature when the engine has just started, it can effectively cut off the large circulation water route to automatically connect the small circulation water, and reduce the heat dissipation so that the temperature of the diesel engine will rise quickly.

When the temperature rises to a certain temperature for a period of time when the diesel engine runs, the North Baotou Mercedes Benz fittings will automatically open the large circulation, close the small circulation, and increase the heat dissipation to keep the water temperature of the diesel engine in a certain range. If the thermostat is damaged, the large circulating water will not be connected, resulting in poor circulation of cooling water and poor heat dissipation of the diesel engine, which will lead to overheating.