When the automobile engine is working, it will continuously generate heat. The function of the cooling system is to ensure that the engine works at normal temperature, and the excess heat needs to be "carried" into the air. The "tool" that carries heat is coolant. There is a cooling channel inside the engine, and the radiator is connected with the outside world through pipes, which is the cooling system. The system is full of coolant. When the engine temperature is too high, the coolant absorbs heat in the engine, and then it is driven by the water pump to the radiator to release heat into low-temperature coolant, and then it flows back to the engine from the return water pipeline. This process is like the heating in our house.
At first, engine coolant used water besides heating, but it was troublesome to use water. First of all, it will produce scale, and second, water will cause rust inside the engine. Moreover, water will freeze below zero, and the increase in volume after freezing will damage the cooling system or engine. So later, people added some non-freezing substances to the water to ensure that the coolant would not freeze at low temperature. Because of this, the non-freezing coolant is also called antifreeze.
The main components of antifreeze are water and ethylene glycol. In addition, there are some chemicals that can protect the metal inside the engine from corrosion. According to the different components of antifreeze, it is generally divided into inorganic antifreeze and organic antifreeze. Inorganic antifreeze is generally green and has a short life, generally about 50 thousand kilometers. Organic antifreeze is generally red, and its service life can reach more than100000 km.
Cars need to use antifreeze all year round, and the antifreeze needs to be replaced after reaching the service life, and the season is not the standard for replacement.
As we all know, the effective service life of antifreeze is mostly two years, or it has to be replaced after driving 60 thousand kilometers. The freezing point, boiling point and PH value of expired antifreeze will decrease, and the corrosion of heating aluminum cylinder, water pump and water tank will also increase, which is easy to cause high temperature boiling in the car!
Question: Do you need to change antifreeze in winter? The answer is, if you already have antifreeze in your car, and it hasn't been two years or the mileage is less than 60 thousand kilometers, then you don't need to replace antifreeze. Otherwise, it is recommended that you replace the antifreeze with a new one in time. So as not to cause unnecessary losses. Causing the cooling system to malfunction.
The freezing point of water is 0℃, and ordinary antifreeze can reach -35℃. Car owners can choose antifreeze with a certain freezing point according to their own area. If you drive to a very cold place, consider whether the freezing point of antifreeze in the car is lower than the local minimum temperature. You should consider whether to replace the antifreeze.
The colors of antifreeze are generally red, green, blue and orange. For example, Toyota antifreeze is red and Honda antifreeze is green. When replacing antifreeze, it must be noted that antifreeze of different models, brands and colors cannot be mixed to avoid chemical reaction, precipitation or bubbles. Doing so will damage the rubber seal, which usually leads to water leakage at the water seal and weld of the water pump.
Some car owners add water directly without antifreeze after replacing the water tank or water pump accessories. Be sure to replace antifreeze in time in winter. Otherwise, the machine will be easily damaged in winter. When the vehicle lacks a large amount of antifreeze, the same type of antifreeze should be added, and water is not recommended. After all, after adding a lot of water, the performance of antifreeze is reduced, which has a great impact on the cooling system of the car.
You don't need to change it specially. If it's time to change antifreeze, then change it.
Antifreeze is basically a multi-purpose antifreeze that can be used all year round. For general vehicles, 100000km is no problem. You can refer to the maintenance suggestions at the back of the driver's manual. Under normal circumstances, if the vehicle antifreeze is not lacking too much, it does not need to be supplemented in large quantities.
The main functions of antifreeze are cooling, rust prevention, boiling prevention and antifreeze. According to the use environment of the car, if the performance of antifreeze is good, it is not necessary to replace antifreeze. If you need to go to a cold area, go to a 4S shop to measure the freezing point of antifreeze. If the freezing point exceeds the local minimum temperature, it can be used.
Change antifreeze in winter, which is divided into summer and winter.
The antifreeze should be called automobile antifreeze coolant, which has the functions of preventing freezing in winter and boiling in summer, preventing corrosion and scaling, protecting the cooling system of the engine, improving the heat dissipation effect and improving the efficiency of the engine. Therefore, antifreeze is not only used in winter, but should be used to cool automobile engines all year round instead of using water.
Selection of antifreeze:
1. Select the freezing point according to the ambient temperature conditions of the car. The brand of antifreeze is its freezing point. In general, the freezing point should be about 10℃ lower than the local minimum temperature in winter.
2. Choose antifreeze according to the requirements of the vehicle. Imported cars and domestic high-end cars should use long-acting antifreeze (universal in all seasons), ordinary cars can use short-acting antifreeze, and softened water can be used instead in summer.
3. Choose antifreeze according to the number and concentration of vehicles. Units with more vehicles and relatively concentrated vehicles can choose concentrated antifreeze, which has stable performance and can be prepared according to different environmental conditions and work requirements to achieve the purpose of saving and practicality.
4. Try to choose antifreeze with antirust, anticorrosive and descaling functions.
Coolant is needed, but its temperature is the lowest. Generally, it depends on the number of kilometers, or the use of coolant, whether it is cloudy, the color changes, or white. Wait, I suggest replacing it. If it is lacking, you can add a little water. Generally, the coolant tank has upper and lower limits. As long as it's in the middle. You can change the mileage in winter if you want.
If your water tank is cooled by water in winter, you definitely need to change antifreeze! If you use antifreeze to cool down in summer, you don't need to replace it all in winter. Pay attention to the scale line of your antifreeze kettle, and don't go below it!
At present, there are three kinds of antifreeze commonly used in the market, namely ethylene glycol, mixed alcohol and methanol. Ethylene glycol has the best quality and the highest price! Followed by mixed alcohol and methanol.
The service life of antifreeze is generally changed once every two years!
I hope it helps you.
It's winter. For northern car owners and car owners who have bought cars for more than three years, whether to replace antifreeze has always been a problem that plagues northern car owners. So I will explain this problem to you today.
Antifreeze, as its name implies, is the cooling liquid of automobile, which cools the engine through the cooling of antifreeze. It can be said that the engine is inseparable from antifreeze, and the importance of antifreeze is self-evident. Since antifreeze is so important, should it be replaced? The standard replacement time of antifreeze is two years or 40 thousand kilometers. After this time, you need to replace the antifreeze. So, do you want to change the antifreeze on time? I'm here to tell you that if economic conditions permit, it's best to replace the antifreeze every two years or 40,000 kilometers, because if the antifreeze is not replaced for a long time, the freezing point of the antifreeze will drop, which will corrode the engine cylinder block for a long time, leading to the blockage of the cylinder block or water pipe and the increase of engine temperature. These consequences are very serious.
Of course, antifreeze does not need to be replaced. Some cars have not been replaced with antifreeze until they are scrapped, and there is no problem. However, some cars do not replace antifreeze, which will cause water pipes to be blocked, so it is best to replace antifreeze if possible. what do you think?
Antifreeze not only has the function of antifreeze, but also has the following advantages:
First, anti-corrosion. The engine and cooling system are mostly made of metal. When the engine runs at high speed, the temperature will reach 100 degrees. At high temperature, metals will be corroded and rusted when exposed to water. Antifreeze not only won't corrode, but also has the functions of protection and rust removal.
Second, the boiling point is high. The boiling point of antifreeze is usually above 1 10, which is more difficult to boil than water.
Third, it can prevent dirt. Many drivers like to use water as antifreeze, but after a long time, scale becomes the most troublesome problem. With antifreeze, you don't have to worry about this problem.
When adding antifreeze, be careful not to touch the skin, because ethylene glycol in antifreeze is an organic solvent and corrosive. If you accidentally splash it on your skin, rinse it with clear water immediately to avoid damaging your skin.
Generally speaking, the shelf life of antifreeze is 5 years, but we'd better not use the old antifreeze for a long time. Under normal circumstances, a new antifreeze can be replaced after driving 30 thousand kilometers, but once these signals appear in the car, it reminds us that we must replace antifreeze. During driving, you will find that the water temperature of the car is very high, indicating that our antifreeze needs to be replaced.
Need.