Have you got the knowledge of car antifreeze?

What is antifreeze?

Antifreeze and coolant are the same thing.Is in the enginecooling systemCirculatingWith antifreeze and other functionsThe main function of the cooling medium isCool down the engine.

Can water be used instead of antifreeze?

Antifreeze must haveAnti-boiling in summer and anti-freezing in winterCharacteristics,carThe normal working temperature of the engine is about 90~110℃, and the freezing point of water is 0℃ and the boiling point is 100℃. If all water is injected, it will "boil" when the water temperature reaches 100℃, and the vehicle will be turned off and parked for a long time in winter. Especially overnight, when the ambient temperature is below zero, the water in the cooling system will freeze up and damage the cooling system.

And the antifreeze also hasAnti-rust and anti-corrosionThe engine’s cooling system is made of metal and non-metal materials. If it is in contact with water at high temperature for a long time, corrosion, rust and scale will affect the effect of the cooling system and cause damage to the engine.

So no matter in winter or summer, antifreeze should be used instead of water.

Water can only be added in an emergency

However, occasionally there will be antifreeze level alarms on the road. (Which is the "antifreeze level alarm light"? The car onion ring WeChat public account replied "Warning light"Come up and up.) And you can't buy antifreeze nearby,As an emergency measure, a small amount of distilled water or purified water can be added, and the addition amount only needs to ensure that the vehicle can drive normally.

However, after adding distilled water to the antifreeze, you need to re-measure the "freezing point" of the antifreeze as soon as possible. If the freezing point is within the required range, add the antifreeze to the normal level; if the "freezing point" does not meet the requirements, you can only The car has been replaced with antifreeze.

What should I pay attention to when checking antifreeze?

The engine cooling system is an important part of the engine. Antifreeze can be said to be the “top priority”.Regularly check the level and freezing point of antifreeze.

First, the liquid level check can be done by the car owner. After the vehicle is turned off, open the front machine cover and you will see the antifreeze tank. The liquid level can be between MAX and MIN.

If you find that the vehicle is losing antifreeze, you can replenish the antifreeze by yourself. When replenishing the antifreeze, you must wait for a while when the car is cold or after the flame is turned off.(Avoid being scalded by hot water spouting), Find the antifreeze tank, pour the antifreeze of the same model and color, and add the antifreeze between MAX and MIN. If the hand shakes when adding, it exceeds the maximum limit of MAX. Don’t panic, just add a little more. There is no impact.

Secondly, freezing point inspection needs to rely on professionalTesting EquipmentIf you can’t do it yourself, it’s best to go to a regular repair shop.

If you find that the freezing point of the antifreeze is too high, you need to replace the antifreeze as a whole. The original antifreeze in the vehicle cooling system must be cleaned, and after cleaning it, add new antifreeze. This process is slightly complicated. In case, I suggest you go to a regular repair shop for replacement.

According to Congge’s experience, the freezing point of the antifreeze should be checked every time the vehicle is maintained.If the freezing point is qualified, there is no need to strictly follow the cycle of how many years and how many kilometers to replace it. Basically, it is enough to change the antifreeze once every 3 to 5 years.

How to choose so much antifreeze?

In fact, the three most fundamental points for choosing antifreeze areFreezing point, boiling point and production date.

Pay special attention to the model, and must meet the freezing point requirements,Generally choose an antifreeze that is 10 degrees Celsius lower than the minimum temperature.

Secondly, pay attention to the boiling point of antifreeze. Generally, the boiling point of antifreeze is about 108℃, but some engines can reach 110℃.Therefore, when choosing an antifreeze, you should choose an antifreeze with a higher boiling point.

Thirdly, it depends on the production date of the antifreeze. After all, the antifreeze is a chemical product and has a shelf life. Generally, the shelf life of the antifreeze is two years. Corrosion of the cooling system.

There is also a color problem. In fact, the color of the antifreeze has nothing to do with its performance. The antifreeze itself is a colorless liquid. The different colors of the antifreeze are mainly dyes that are added by different manufacturers for easy distinction, so choose the antifreeze At the time, first choose the antifreeze of the same manufacturer, model and color, becauseThe mixing of different types and colors of antifreeze will produce chemical reactions, and the resulting precipitation and bubbles will cause damage to the rubber seal ring and water leakage at the weld. Therefore, different colors of antifreeze cannot be mixed.