Excessive engine water temperature usually causes boiling of coolant in the radiator, a decrease in power, a decrease in lubricating oil viscosity, increased friction between engine components, and even serious malfunctions such as engine cylinder pulling and cylinder gasket burning. Saiwei Energy has summarized the main reasons for high engine temperatures and proposed some improvement measures:

1. Long term overload operation

Prolonged overloading of the engine can increase fuel consumption and heat load, resulting in high water temperature. To this end, it is necessary to avoid prolonged overloading of the engine.

2. Insufficient coolant

If there is a lack of coolant in the engine cooling system, it will affect the engine's heat dissipation effect and cause high engine temperatures. In this regard, it is necessary to regularly check the coolant stock in the radiator and expansion tank, and replenish it in a timely manner when the liquid level is low

3. Fan belt too loose or fan deformed

If the fan belt is too loose, it can easily cause a decrease in fan speed, resulting in the radiator not being able to fully dissipate heat and causing the engine temperature to be too high. In addition, fan deformation can also cause the heat dissipation capacity of the radiator to not be fully utilized. In this regard, it is necessary to regularly check whether the engine fan belt is loose and whether the fan shape is abnormal.

4. Foreign objects adhering to the surface of the radiator

The adhesion of debris on the surface of the radiator not only reduces the heat dissipation area of the radiator, but also reduces the windward area of the radiator, leading to a decrease in the radiator's heat dissipation capacity and causing high engine temperatures. The adhesion of debris on the surface of a radiator is the most common phenomenon. This article combines the structural characteristics of a radiator to introduce the precautions during its cleaning process:

The reduction of the windward area of the generator leads to a decrease in the heat dissipation capacity of the radiator, causing high temperatures in the engine. The adhesion of debris on the surface of a radiator is the most common phenomenon. This article combines the structural characteristics of a radiator to introduce the precautions during its cleaning process:

Due to the difficulty in disassembling the radiator as a whole, only the relevant components can be disassembled. After disassembling the dust screen, large debris should be removed using tools such as brushes, and then the dust screen should be rinsed with high-pressure water or gas. It is recommended to maintain a water or air flow pressure of at least 1MPa. To facilitate the cleaning of the core of the radiator, components such as the air guide cover and fan guard should be removed.

When flushing the radiator, the nozzle should be as perpendicular as possible to the plane of the radiator, and the nozzle should be kept 10-30mm away from the radiator. The nozzle pressure should be adjusted according to the thickness of the radiator core. If conditions permit, clean with high-pressure water flow and then use compressed air to clean again, using the same method as above. If the conditions limit the use of compressed air, the radiator should be moistened with water first, and then cleaned directly with compressed air. The gas pressure should be above 2.5MPa. After cleaning, reassemble the removed components to complete the cleaning work.

5. Poor coolant circulation

Insufficient opening of the thermostat will reduce the heat dissipation capacity of the engine cooling system during the large cycle. If the engine is hot, the thermostat can be placed in water for heating inspection. Generally, the opening distance of the thermostat is 8-10mm.

Poor performance of the water pump can cause a decrease in coolant flow, leading to high temperatures in the diesel engine. In this regard, the upper and lower chambers of the radiator should be inspected. The temperature difference between the upper and lower chambers is generally between 6-12 ℃. If it is too small, the water pump can be replaced.

Excessive scale can also affect the heat dissipation efficiency of the fins inside the radiator, reducing the thermal conductivity of the coolant and cold air. In this regard, the diesel engine cooling system should be regularly cleaned, while avoiding the use of inferior coolant to reduce the generation of scale.

Guangzhou Saiwei Energy Technology Co., Ltd. is a comprehensive enterprise specializing in the design, production, and installation of generators. Guangzhou Saiwei has many years of experience in engineering design and installation services. For many years, Guangzhou Saiwei has been committed to providing every customer with comprehensive products and energy solutions, including technical consulting, whole machine and generator supply, operation training, etc., with leading technology and first-class quality. The product range covers land diesel generator sets, marine generator sets, high-voltage generator sets, etc., and is widely used in industries such as power, communication, iron towers, healthcare, financial systems, data centers, etc. Welcome to inquire: 13302262088