Sunday, June 28, 2020

Five factors to pay attention to in car maintenance in cold winter

Winter is a "very" season for cars, so it is very important to maintain and maintain the car safely through the winter. The detection of engines, tires and lights is common, but the detection and adjustment of heating, antifreeze and brake systems are targeted.

Antifreeze must be changed every two years

The primary function of the antifreeze is to prevent the coolant from freezing and bursting the radiator and freezing the engine cylinder block or cover during cold winter parking. It has an extremely important role in the safe winter of the car.

If it is a new car, it is generally not necessary to add antifreeze within two years, because all vehicles have been added before leaving the factory. If it is an old car, the high-quality antifreeze has been replaced in the previous year, that is, the freezing point, boiling point and anti-corrosion performance of the antifreeze meet the requirements, so this year does not need to be replaced. However, if you haven’t changed the antifreeze in two years, you must replace it. This is because the effective period of antifreeze is generally two years. Expired antifreeze will cause corrosion of the cylinder block and cause serious damage to the engine. In addition, make sure that the freezing point of the antifreeze is kept at about minus 25 degrees. If you go to a colder place, you need to change the antifreeze with a lower freezing point.

The battery should be supplemented with electrolyte

The storage battery is most afraid of low temperature, and the storage battery capacity in low temperature environment is much lower than that at normal temperature. Therefore, before the advent of the cold season, the electrolyte of the battery should be replenished, and the terminal of the battery should be cleaned at the same time, and coated with special grease to protect it to ensure reliable starting and extend the life of the battery. If the vehicle is not used in the open air or cold storage for several weeks, the battery should be removed and stored in a warmer room to prevent the battery from being damaged by icing.

Lubricant should be replaced with low temperature

In addition to replacing the antifreeze, it is safe to pass the winter, and the owner should pay attention to the replacement of the engine oil. The viscosity of motor oil changes with temperature. At present, there are two types of engine oil on the market: "single-stage and multi-stage". The temperature range of single-stage engine oil is relatively narrow. One viscosity level is only suitable for part of the year and cannot be used throughout the year. If the engine uses lubricating oil as multi-grade oil, it can be used in winter and summer (multi-grade oil: 10W/300E gasoline engine oil, use range -20℃-40℃; 15W/300E gasoline engine oil, use range -18℃-40℃; 15W/ 400E gasoline engine oil, use range above -18 ℃). If your car uses "single-grade" motor oil, it should be replaced with low-temperature motor oil in winter.

Do not use tap water for glass cleaning fluid

In summer, many drivers often use pure water or tap water to add detergent to serve as a glass cleaning liquid. This is to save money (the summer use is relatively large), on the other hand, because it is convenient to access, almost Is at hand.

But in winter, it is dangerous to still use tap water as the glass cleaning fluid. Once the temperature is too low, pure water, tap water and other substitutes will often freeze, and sometimes the containers will swell, so in winter, be sure to put the original pure water and other substitutes in the light, and replace it with a glass cleaning fluid that is not afraid of freezing. . If you really want to save, you can use a 5:1 mixed liquid of tap water and antifreeze instead.

Keep the thermostat working properly

The role of the thermostat is to automatically control the normal water temperature of the engine. When starting at a low temperature, the engine can be quickly heated to reduce cylinder wear. In some cars, the water temperature is too high in summer, and the repairman will remove the thermostat. Although it can solve the problem in summer, it will be reversed in winter. If you don't pay attention, you might waste a bucket of antifreeze for a small water pipe.

According to the test, if the thermostat is removed, the engine start-up temperature will be extended by 4 to 5 times, and the cylinder wear will increase by 5 to 6 times. Therefore, the practice of arbitrarily removing the thermostat is incorrect.

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