【Car owner's family car knowledge]There are two main reasons for engine failures caused by antifreeze in winter:
First, because the appropriate antifreeze was not selected, the antifreeze produced impurities in the water tank, or the antifreeze of different brands had a chemical reaction;
The second is because the amount of antifreeze added is too much or too little.
step
First of all, to understand the characteristics of antifreeze can choose the correct antifreeze. Antifreeze is generally composed of base liquid and additives. The base liquid is composed of water and ethylene glycol or diethylene glycol. The additives include rust inhibitor, mildew inhibitor, pH adjuster, antifoaming agent and colorant. In terms of types, antifreeze is generally divided into two types: concentrated and non-concentrated. Non-concentrated antifreeze cannot be diluted with water. Different brands and types of antifreeze are suitable for different temperatures. For example, Castrol Car Insurance series antifreeze is divided into three types: -46°C, -30°C and -15°C. In layman's terms, these three temperatures represent the lowest temperature of the freezing point, that is, the temperature of the antifreeze at this temperature. It will freeze below. Therefore, these three types of antifreeze can fully meet the weather conditions and road conditions in most parts of China. Car owners can choose the appropriate antifreeze according to their location and environment. At the same time, this series of products does not need to be diluted, which is convenient It can be directly used by car owners to meet the anti-freeze protection requirements of the engine.
Secondly, different types of antifreeze cannot be mixed to avoid chemical reactions, resulting in precipitation or bubbles, reducing the use effect. Secondly, various antifreezes have different freezing points due to different proportions and components during preparation. At this time, they should be selected according to local temperature conditions. In the north, you should choose the antifreeze type with lower temperature tolerance, and the concentration should be kept at about 70%; in the south, you can choose the antifreeze type with higher temperature tolerance, and the concentration should be kept at about 50%.
Finally, the level of antifreeze added is generally about 10mm away from the water inlet of the water tank. Too much or too little will easily cause hidden dangers in the cooling system.
Precautions
Experts also remind car owners that if it is a new car purchased that year, there is no need to replace the antifreeze; if the vehicle has been used for more than two years, the antifreeze needs to be replaced in time.
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