Can Antifreeze Be Added Directly?

[OGriffin]

It is not recommended to add directly. Before adding antifreeze to a car, the engine cooling system should be thoroughly cleaned, especially during seasonal changes when the antifreeze needs to be checked. If the antifreeze is insufficient, it should be added promptly. Cleaning before adding antifreeze is mainly to avoid chemical reactions between scale in the engine and the antifreeze, which could cause the scale to flake off and affect the normal performance of the antifreeze, or even clog the water pipes in severe cases. Methods to determine if antifreeze is low: Observe the antifreeze warning light on the dashboard. If it lights up, it is likely due to low antifreeze levels, though it could also be caused by excessively high cylinder temperatures. 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 antifreeze level should normally be between the maximum and minimum marks. If it is below the minimum mark, it indicates a shortage of antifreeze. Methods for selecting antifreeze: The basic indicators for antifreeze are its freezing point and boiling point. On the market, antifreeze comes in specifications such as -15°C, -25°C, -30°C, and -40°C. Generally, it is advisable to choose an antifreeze with a freezing point at least 10°C lower than the lowest temperature in your region.

[KiraRose]

As a car owner with five years of experience, I've encountered coolant issues several times. Remember to wait until the engine is completely cooled before opening the radiator cap, otherwise the pressurized hot water vapor can scald you. Check your manual to confirm which type to use, as different colored coolants may have conflicting ingredients. Once, I mixed red and green coolants to save time, only to find flocculent sediment in the pipes the next day. If you're just topping up in an emergency, you can add a small amount of distilled water, but don't exceed 200ml. If the coolant level keeps dropping, it indicates a leak, and you should immediately have a mechanic check the hoses and water pump. It's important to have the freezing point tested during each maintenance, especially in northern winters when temperatures drop below -25°C, as insufficient coolant concentration can freeze and burst the radiator.

[Kristin]

I helped a neighbor with this issue just the other day. Open the hood and locate the translucent expansion tank, which has MIN and MAX level markers. If the fluid level is below the MIN line when the engine is cold, it's time to top it up. Avoid using tap water, as mineral deposits can clog the cooling passages. Just buy coolant of the same color from the supermarket and pour it in, making sure not to exceed the MAX line. The key is to investigate why the level is dropping: squeeze the hoses to check for hardening or cracks, and inspect below the water pump for pinkish crystals, as these are common leak points. Last month, I replaced the radiator cap—that little $2 part can fail and cause coolant to slowly evaporate if the seal is compromised. If you find yourself topping up every few days, there's likely a leak somewhere.

[RemingtonFitz]

In repair shops, it's common to see customers directly bringing tap water buckets to add coolant. This practice must be stopped! Tap water contains minerals that can form scale deposits in the radiator under high temperatures, potentially costing thousands to repair. In emergencies, a small amount of distilled water can be added temporarily, but it's best to purchase ready-made coolant. Different brands may have chemical reactions; last time, a Buick had its heater core clogged by gel-like substances after mixing coolants. Factory coolant concentrations are tested with a freezing point detector, so when adding, it's best to buy the same color and specification. A complete replacement is recommended every two years, as long-term use increases acidity, corroding metal pipes.