Can I Add Mineral Water to Car Coolant?
2 Answers
You can add a small amount of mineral water to car coolant, but excessive addition should be avoided as it may cause damage to certain parts of the vehicle. Below is detailed information about coolant: 1. Overview: Coolant, fully known as antifreeze coolant, refers to a cooling liquid with antifreeze properties. It prevents the coolant from freezing and expanding in cold weather, which could otherwise crack the radiator or damage the engine cylinder block. Coolant consists of three components: water, antifreeze, and additives. 2. Usage: Antifreeze is not only for winter use but should be used throughout the year. In regular car maintenance, the engine coolant should be replaced annually.
I've seen many novice car owners ask this question, thinking that mineral water is a cheap and convenient emergency solution. But as a veteran driver with decades of experience, I must say this practice carries significant risks. Mineral water contains various minerals, such as calcium and magnesium ions, which can easily form scale when added to the cooling system. This scale accumulates in the radiator or water pump, reducing cooling efficiency. Over time, engine overheating is inevitable, and repairs can be costly—ranging from a few hundred dollars for cleaning the pipes to replacing the radiator or even causing engine damage. Coolant isn't just for antifreeze and anti-boil purposes; it also contains special additives to prevent corrosion and protect metal components. In an emergency, if there's no other option, distilled water can be a temporary substitute because it lacks minerals—but mineral water is absolutely unacceptable. I recommend keeping a small bottle of dedicated coolant in the car, developing a habit of regularly checking the coolant level, and replacing the coolant every two years to ensure safe driving.
