What are the reasons for the high water temperature in Dongfeng Fengguang 580?
2 Answers
The reasons for the high water temperature in Dongfeng Fengguang 580 are as follows: 1. Severe leakage in the cooling system or insufficient water volume: Overheating caused by insufficient coolant due to severe leakage in the cooling system can be diagnosed directly through observation and the fault can be eliminated smoothly. There are two reasons for engine overheating due to the cooling system's water capacity being lower than the standard capacity: (1) Excessive scale: This mainly occurs in engines that have used water as coolant for a long time. As the mileage increases, the scale on the water jacket walls and inside the radiator tubes in contact with the cooling water will gradually thicken, especially in high-temperature areas, severely affecting the radiator's heat dissipation efficiency. The heat generated by the engine's operation becomes difficult to dissipate in time, leading to overheating. (2) Radiator clogged by debris: The radiator may be filled with sludge, scale, cotton yarn, and other debris, blocking many core tubes and causing the radiator's actual capacity to be far below the standard capacity. After removing the debris from the engine, the overheating phenomenon will disappear. 2. Abnormal water pump operation: If the discharge indicator or charging light comes on while driving and the engine overheats at the same time, it is usually due to a broken water pump belt. If the water pump belt is in good technical condition and has proper tension, then consider whether the water pump has failed, interrupting the circulation of cooling water and causing engine overheating. 3. Thermostat failure: This fault is mainly manifested by the thermostat's main valve not opening fully or the thermostat being stuck between large and small cycles. Other issues include aging of the thermostat and poor sealing causing leakage of the expansion body. These faults can all lead to poor circulation of cooling water in the large cycle after the engine temperature rises, resulting in engine overheating.
My old Dongfeng Fengguang 580 has high engine temperature, and there are quite a few possible reasons. The most common issue is with the cooling system, such as insufficient coolant or clogged radiator due to dirt buildup, which greatly reduces cooling efficiency. Another possibility is the cooling fan not working, which could be due to a faulty motor or control module—check if the fan starts when the car is parked. A stuck thermostat is also a typical cause; this component controls the flow of coolant, and if it gets stuck in the closed position, heat can't dissipate. If the water pump fails, coolant won't circulate, leading to high temperatures. I recommend checking the coolant level before driving and looking for any signs of leaks. If the fan doesn’t turn on when the engine is hot, take it to a repair shop immediately. Also, remember to clean the radiator during regular maintenance and replace the thermostat on schedule.
