What causes the turbidity and blackening of the truck coolant

Once the truck coolant becomes turbid, blackened, and mixed with impurities, it is not simply caused by a lack of water. It represents that the cooling system has already encountered pollution, rust, or component damage problems. The harsh transportation environment of overseas construction sites has scattered maintenance outlets, and many drivers ignore the problem of coolant deterioration and continue to drive, which can easily cause major faults such as engine high temperature cylinder pulling, cylinder block damage, and water tank blockage. High maintenance costs can also cause the vehicle to stop working. Understanding the causes of coolant blackening and turbidity can not only quickly identify faults, but also do a good job in daily maintenance to avoid the recurrence of faults. The first and most common reason is the mixing of coolant and the addition of inferior antifreeze. Different brands and models of coolant have different compositions, such as long-acting ethylene glycol antifreeze, ordinary blue antifreeze After mixing with miscellaneous coolant, a chemical reaction occurs, producing gel like sediment that accumulates inside the water tank, water pipe, and engine waterway, causing the antifreeze to gradually become cloudy and black. Some overseas fleets directly add tap water or river water as coolant to save costs. The water contains minerals, sediment, and microorganisms, and long-term use will form scale and sludge in the waterway. Continuous accumulation not only pollutes the coolant, causing it to turn black, but also blocks the radiator, resulting in poor engine heat dissipation and high temperature boiling,The second cause is the damage and leakage of the cylinder gasket inside the engine. After the cylinder gasket is damaged, the engine oil will enter the cooling water channel. The oil mixed with the coolant will gradually turn black and emulsify the antifreeze, and the liquid will appear turbid and viscous. At the same time, oil droplets will float in the water tank and water replenishment kettle. With the inexplicable increase in vehicle water temperature and abnormal decrease in oil level, this fault is very dangerous. If the engine oil continues to enter the water channel while driving, not only will the cooling system fail completely, but the engine will also experience serious faults such as insufficient lubrication and crankshaft wear and lock up. The third cause is that the cooling system is not cleaned and maintained for a long time, resulting in rust, corrosion and debris. Truck water tanks, water pipes, and engine water channels are mostly made of metal materials. After the long-term shelf life of the coolant exceeds two years, anti-corrosion and anti rust The wall of the water tank pipe begins to rust and peel off, and the rust debris merges into the coolant. Over time, the liquid color gradually darkens and turns black. If the antifreeze is not replaced for an old vehicle for a long time, the accumulation of rust can also cause the water tank to block and greatly reduce its heat dissipation ability. The fourth situation is that the radiator of the water tank is damaged, and external sediment and debris enter the waterway. When driving on the mining site, gravel breaks through the water tank, causing slight leakage. Soil and dust enter the cooling system along the damaged location, and impurities mixed with antifreeze continue to circulate, ultimately causing the coolant to become cloudy and black. In addition, the debris generated by the broken cooling fan and the peeling of the anti-corrosion coating of the water tank can also contaminate the entire tank of coolant. The fifth point is that the aging, damage, and leakage of the small radiator of the warm air tank can, Slowly change the color of the coolant, which is often accompanied by the odor of antifreeze and the accumulation of water in the driver's seat mats when the car is heated. In order to avoid blackening and deterioration of the coolant during daily operation and maintenance, it is strictly prohibited to mix different types of antifreeze, and it is strictly forbidden to add tap water for replenishment. Long term antifreeze should be replaced strictly according to the cycle. If the coolant turns black and emulsifies, first check whether the cylinder gasket has oil leakage. If there is no problem of oil mixing, thoroughly disassemble and clean the water tank and waterway, remove scale and rust, and refill with genuine antifreeze. Heavy trucks in overseas mining areas operate in high temperature and dusty environments all year round. It is recommended to check the coolant status once and a half a year. If there is turbidity or discoloration, it should be dealt with in a timely manner to prevent it from being on the road with diseases. Low.