The five major maintenance knowledge needs to be taken care of in winter

【Knowledge of Car Owner's Home】As the leaves fall, the weather is getting cooler day by day, and the cold winter is coming. There are more bad weather such as rain, snow and fog in cold winter, and the road surface becomes more and more complicated. Therefore, the car needs double maintenance. The following is a summary of the winter car maintenance methods for everyone.

1. Body maintenance

1. Vehicle washing

Wash the vehicle in winter with warm water, not directly with cold water. Especially after the engine heats up, washing with cold water will cool down rapidly, causing the paint on the surface of the hood to crack. After washing, the door should be opened in time to wipe off the water stains to prevent the water left in the door gap from freezing and freezing the door. When the window is frozen, do not forcefully open and close it. In addition, it often snows in winter, and cleaning the car surface after snow is also very important. Because the snow water contains acidic and corrosive substances to avoid damage to the car paint and premature rust, so it should be cleaned in time. Car owners in northern regions should pay special attention to the fact that salt water is sprinkled on the road after snow, and the salt water splashed on the car body will cause great harm to the car paint, so pay attention to cleaning.

Before winter, it is best to add a protective film to the car body. Car paint coatings or mirror glazes containing Teflon polymers can resist the erosion of acid rain and fog. At the same time, the car body is not easy to get wet, so the possibility of freezing is reduced.

2. Bottom maintenance

In winter, the chassis of the car is always directly exposed to snow and water, and it is easy to rust. Speeding tires throw muddy water onto the undercarriage of the car. After the rain, the chassis of the car begins to rust. Therefore, it is best to spend some time before winter to give the chassis an anti-rust care.

3. Tire maintenance

Rubber will become hard and relatively brittle in winter, and the coefficient of friction of the tire will decrease and it will be easier to leak air and puncture the tire. Therefore, the tire pressure should not be too high, but it should not be too low. If the tire pressure is too low, the outside air temperature is low, and the aging of soft tires can be accelerated. In winter, the inclusions in the tire pattern should be cleaned frequently, try to avoid using tires that have been repaired more than once, and replace tires with greater wear and different brands and different patterns. The inner and outer wear of tires are very different. In order to ensure safety and reduce wear, the tires should be replaced regularly. Therefore, car owners must always check the condition of the tires. If serious damage or irregular wear of the tread is found, they must immediately go to the 4S shop for professional inspection to avoid dangerous accidents.

4. Oil maintenance

1. Change the engine oil

The temperature is low in winter, and the viscosity of engine oil in summer becomes thicker, the crankshaft circulation resistance becomes larger, and the fluidity of the engine oil is poor, resulting in increased wear of the piston and cylinder liner, making it difficult for the car to start cold, and seriously causing accidents such as burning paddles and locking the shaft. Therefore, it is necessary to switch to a winter engine oil with a low label and good fluidity.

2. Check and replace antifreeze

The temperature drops sharply in winter. If the vehicle does not check and replace the antifreeze in time, the temperature will be lower than the freezing point of the antifreeze, which will cause the water to freeze and expand, which will cause the water tank to freeze and crack, making the engine unable to run. Therefore, when car owners change antifreeze, they should choose regular antifreeze products with a freezing point lower than the lowest temperature in the area by 5-10°C, and change them at least once every two years. If water has been added to the antifreeze, the antifreeze must be replaced to protect the normal operation of the engine.

Five. Electrical maintenance

The weather is cold in winter, and the battery is also most afraid of low temperature. The battery capacity in low temperature environment is much lower than that at normal temperature. Therefore, before the cold season comes, the electrolyte of the battery should be replenished and the specific gravity of the electrolyte should be adjusted. At the same time, clean the terminal posts of the battery and apply special grease to protect them, so as to ensure reliable starting and prolong the life of the battery. If the vehicle is not used for several weeks in the open air or in a cold storage, the battery should be removed and stored in a warmer room to prevent the battery from being damaged by freezing. Generally, the battery life is two to three years. If the battery is close to its service life, especially for automatic transmission vehicles, it is best to replace it in advance to prevent accidents. When the cold car is difficult to start, it should be started again after about 30 seconds, and continuous ignition should not be avoided to prevent damage to the starter and exhaustion of the battery.

Winter maintenance knowledge must be used properly, so that our car can wear the warmest "down jacket". In winter, the car also becomes "delicate". Like a child, it needs you to dress it warmly and take care of it comprehensively. If you are careless, it will definitely cause you a lot of trouble in this season. Taking cars as friends is the highest state of keeping and loving cars.

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