Why Has the Antifreeze Changed Color?
2 Answers
Antifreeze changes color for the following reasons: 1. If the antifreeze changes color, it is likely due to deterioration. Not only does it lose its antifreeze properties, but its cooling effect on the engine is also reduced. When the engine operates at high temperatures without effective cooling, the viscosity of the engine oil decreases, leading to wear and tear on engine components over time, and in severe cases, the engine may even be completely damaged. Therefore, it is important to pay attention to the replacement cycle of the antifreeze. 2. Another possible reason is the contamination of the antifreeze with engine oil. This can occur due to issues with the oil cooler or filter, or because of aging seals. It is advisable to visit an auto repair shop as soon as possible for repairs.
The discoloration of antifreeze is usually caused by aging or contamination. A while ago, I noticed that the antifreeze in my car changed from its original clear green to a cloudy brown, mainly because it had been used for over two years, and the additives inside oxidized and decomposed, reducing its anti-corrosion properties. Hot weather can accelerate this process. For example, since I often drive long distances, the high engine temperature sped up the discoloration. Discoloration can also result from mixing with dust or scale, forming deposits that clog pipes and lead to poor heat dissipation. Last time, I didn’t replace the fluid in time, which caused the water pump to corrode and leak, costing me over a thousand yuan in repairs. Now, I check the antifreeze color every two years or 20,000 kilometers to keep the cooling system clean.
