Should the Coolant Be Replaced If It Turns Yellow?
2 Answers
It is recommended to replace the coolant if it has changed color, as this indicates that the coolant has deteriorated. Here are the relevant details: Long-term non-replacement: Failing to replace the coolant for an extended period can lead to changes in its quality, reducing its anti-corrosion properties and potentially damaging the radiator and pipes. Additionally, it can affect the boiling and freezing points, compromising the antifreeze or cooling performance, which can harm the engine. Do not wait until the coolant turns black to replace it, as this signifies severe deterioration. A significant amount of scale may have also formed, causing damage to the pipes. Therefore, during each maintenance check, use a refractometer to test the freezing point of the coolant.
Yellowing coolant does indeed warrant replacement. From experience, coolant typically has a specific color, such as green or pink, and turning yellow usually indicates it has begun to deteriorate, possibly due to water dilution, rust, or oxidation aging. This can reduce cooling efficiency, making the engine prone to overheating while driving, and may even cause freezing in winter. I check the coolant every two years or every 30,000 kilometers, and if I notice it has turned yellow, I replace it immediately. Don’t underestimate this—prolonged neglect increases the risk of engine damage, and repairs could cost far more than a few hundred dollars. It’s also important to regularly clean the radiator and cooling system to prevent buildup of contaminants that could cause issues, ensuring peace of mind while driving. Addressing it promptly helps avoid the hassle of a roadside breakdown.
