Does adding too much antifreeze affect the car?
2 Answers
Adding too much antifreeze from a reputable brand will not have any significant impact. The excess antifreeze will expand due to heat during vehicle operation and overflow through the pressure relief valve, which is harmless but may leave some stains. However, it is recommended to use a syringe to remove the antifreeze above the maximum water level. On the other hand, antifreeze produced by substandard manufacturers may be corrosive, potentially damaging the cooling system. Excess antifreeze overflow can also harm electrical wiring and other components in the engine bay, and in severe cases, it may corrode the radiator and flow into the engine. Generally, vehicle antifreeze should be replaced every 2 years or 40,000 kilometers. This is only a reference interval. For commercial vehicles with higher mileage, the replacement cycle should be shorter. Since driving conditions vary for each vehicle, the replacement should be based on actual usage. Regularly check the antifreeze level and replenish it promptly if it is low. If suspended particles, sediment, or discoloration are observed in the antifreeze, replace it immediately and clean the system. Methods to determine if antifreeze is low: Observe the antifreeze warning light on the dashboard. If it illuminates, it likely indicates low antifreeze, though it could also be due to excessively high engine temperature. Check the antifreeze reservoir. If the level is below the minimum mark (MIN), do not continue driving and add antifreeze promptly. Check the water level markings on the antifreeze tank. The normal antifreeze level should be between the maximum and minimum marks. If the antifreeze is below the minimum mark, it indicates a deficiency.
I just bought a car not long ago and have done this silly thing too. Adding too much coolant really has an impact because the cooling system is designed with expansion space reserved. When it's full, the liquid will expand excessively, potentially pushing the cap open or spraying out from the overflow tank, dirtying the engine bay and corroding components. In the long run, it can cause the gaskets to age faster, affecting heat dissipation efficiency and leading to uncontrolled engine temperature. I once experienced scary fluctuations in water temperature during a long-distance drive, and it only stabilized after the repair shop removed the excess liquid. So remember not to exceed the MAX line, and when changing it yourself, adding slowly is the safest way.
