What should be noted when adding water to the car radiator?

[SanMakayla]

Special radiator coolant or qualified antifreeze must be added to the car radiator. When selecting radiator coolant or antifreeze, it is advisable to choose high-quality diluted radiator coolant or antifreeze. In case of unexpected water shortage, tap water can be supplemented to prevent unnecessary losses caused by water shortage. Moreover, both special radiator coolant and antifreeze offer freeze and boil protection, which water cannot match. Below is more relevant information: Precautions: 1. The radiator should not be filled too full. If water is added and too much or even full, it will cause a large amount of overflow due to "thermal expansion," leaving many water marks and scale on the surface. Additionally, adding water can produce scale in the cooling system, clogging pipes, affecting heat dissipation, and damaging the engine. Furthermore, the optimal operating temperature range for most car engines is 75-90℃; temperatures higher or lower are not conducive to engine performance. 2. The liquid level in the radiator should be kept between the min and max marks. If it is below the min mark, it needs to be topped up, and the same brand and specification of coolant must be added; otherwise, a complete replacement is necessary. The choice of coolant is mainly determined by the local minimum temperature, and it is generally all-season when leaving the factory. If the radiator does not leak, it may not need water added all year, but regular checks are still required. As long as there is no leakage, the level will hardly decrease, and there is no standard for how much to add. The water in the car radiator is antifreeze, which has functions of freeze protection, rust prevention, and boil prevention. 3. If water is added, the radiator can be cleaned once after tens of thousands of kilometers, during which the coolant can be replaced. If coolant is added, it needs to be replaced every two years. Nowadays, there are many high-quality long-lasting antifreeze products, and regular top-ups are sufficient. When cleaning the radiator after tens of thousands of kilometers, it can be replaced once.