Car antifreeze of those little knowledge, do you understand?

There are more types of car antifreeze, however, the normal use is basically glycol type antifreeze. Antifreeze is saved in the car tank, but there are cars using tap water as coolant, tap water is hard water, containing many minerals, water as coolant tank, waterway inside will accumulate scale, dirt and other impurities.

Antifreeze as the engine cooling medium, must have a high boiling point, low freezing point, good thermal stability and volatility of small features, but also has a waterproof scale, corrosion prevention and other important role. Due to the cold weather in winter, antifreeze has a low freezing point, which can effectively prevent the freezing liquid from freezing and expanding and cracking the water tank and cylinder, cylinder head and other important parts. If you have a car that uses water as coolant, you must replace the water with antifreeze when the weather turns cold. Because water has a freezing point of zero degrees, it freezes easily. Summer prevents antifreeze, on the other hand, from being boiled due to excessive engine running temperatures.

After antifreeze produces gas bubbles, it affects heat dissipation, and there is oxygen in the gas, which makes it easy to produce rust. The antifreeze of the car is the same as the oil these fluids, also need to be replaced. General 4s store will let two or three years for maintenance replacement. But some cars will choose to carry out maintenance in the repair shop, it is recommended that the old car every year in the late fall maintenance, with the freezing point detector to detect the car antifreeze, combined with the car environment minimum problem. See if it needs to be replaced. If there is a store warranty, in accordance with the requirements of the installation manufacturer to replace, absolutely no problem, but consumption will be higher. Repair shop maintenance, you can refer to the advice of professional maintenance master to replace.

The general antifreeze replacement cycle is 2 to 3 years or driving mileage to 30,000 to 40,000 kilometers. If you observe the antifreeze appeared some flocculent objects precipitation, do not worry, this is the precipitation of additives, indicating that your car plus antifreeze inside the additives and so on. However, if there is granular precipitation, it is necessary to replace the antifreeze. This is because granularity can clog waterways, leading to poor heat dissipation and high engine temperatures.

When you replace antifreeze, you need to clean the engine waterways. It actually cleans the waterways of scale, impurities. Let the new antifreeze is not contaminated by the previous debris. Antifreeze replacement must be the right amount, not too much but not too little. It is best to be between max and min. Replacement after the engine is running must wear gloves, first pressure relief, slowly unscrew the antifreeze cap, if you unscrew it at once, the water will come out and burn your hands.

Antifreeze replacement, combined with the actual situation to use. Normally, it's not necessary to replace it too often. After all, the quality of the product is still relatively guaranteed. When the engine is working, the coolant will be on the engine working temperature, cooling and transfer. There is a skill to identify, because the engine temperature, basically maintained in a certain interval, after the accumulation of time, the coolant of the old car will be relatively dirty. If the expansion pot is dirty, it will affect the cooling effect.