With the improvement of people’s living standards and the need for their work, there are more and more public and private cars. Many farmers also have their own cars. Likewise, everyone hopes that their cars will last long and reduce maintenance costs. This point must be learned to scientifically maintain the car. However, some problems often arise in car maintenance. Some people originally thought that they were maintaining the car, but in fact they just happened to damage the car.
First, car wash under the hot sun Many car owners like to wash cars under the hot sun, thinking that after such washing, the water on the car body can be dried quickly. In fact, it is wrong to wash the car under the hot sun. The effect of the convex lens formed by the water droplets will cause local high-temperature phenomenon on the top layer of the paint. After a long time, the paint will lose its luster. If waxing at this time, it is also likely to cause uneven body color. Therefore, car washes and waxing are best carried out under sheltered conditions. If there is no guarantee, it is best to choose to do it on cloudy or sunny days in the morning or in the evening. This will prevent car paint.
Second, the car wash like a shower summer temperatures rise, dust increases, the body is easy to dirty, the owner of the car wash frequency also began to rise, many car owners in the car wash also want to take a thorough look like to take a bath. However, it should be noted that it is important to keep the exterior of the car air conditioner dry. If the car air conditioner is accidentally wetted, it will affect the life of the car air conditioner.
Third, the circle of waxing Many people waxing the body are habitually carried out in a circle, which is incorrect. The correct method of waxing is straight line, horizontal and vertical lines alternately, and then the last one in the direction of rainwater flow, so as to achieve the effect of reducing concentric circular halo on the paint surface.
Fourth, too much oil When the engine oil sump in the engine oil is insufficient, bearing and journal friction will be due to the small amount of oil and poor lubrication, increase the degree of wear, and even lead to burning tile shaft accident. However, if the oil is too much, the crankshaft shank and the big end of the connecting rod will violently agitate during the operation of the engine, which not only increases the internal power loss of the engine, but also increases the oil splashed on the cylinder wall, resulting in the burning of the oil. malfunction. Therefore, it is better that the oil in the engine's non-bottom case should be controlled between the upper and lower scoring lines of the oil dipstick.
5. If the bolt is too tight, the bolt will be too tight, which will cause permanent deformation. There are many fasteners on the automobile that are connected with bolts and nuts. It should be ensured that it has sufficient preload, but it cannot be tightened too tightly. If the tightening is too tight, on the one hand, the connecting member will be permanently deformed under the action of the external force; on the other hand, the bolt will be permanently deformed in tension, the pre-tightening force will be reduced, and even a sliding buckle or breaking phenomenon will occur.
6. The fan belt is too tight The fan belt is too tight, causing large bearing loads. Summer temperatures are too high. Some drivers think that increasing the tightness of fan belts can improve the cooling effect of the engine. Therefore, the tightness of fan belts has been increased and the fan belts are too tight. They do not know that this is wrong. The fan belt should be kept tight and tight, because over-tightening will lead to excessive bearing load, increased wear, increased power consumption, but also will make the water pump shaft bending, belt elongation deformation, shortened life.
7. Imported tires imported tires do not apply. Some people particularly like tires to emphasize “importâ€. The new tires that are pushed abroad have one of the most fatal flaws for domestic users. The flat roads in Europe are quite different from the road conditions in Beijing's Second Ring Road and Third Ring Road. Tires suitable for European road conditions are difficult to perform well in Beijing. In particular, the impact resistance of the sidewalls is obviously unsatisfying, just like wearing Italian brand names. Leather shoes to go stone road generally, the tire side from the bag is inevitable. After the tires of some foreign brands are jointly produced in China, they have added a layer of cord fabrics on the side of the tire according to the domestic road conditions, which greatly enhances the impact resistance of the sidewalls. The tires produced by the joint venture can completely replace imported goods in terms of performance. .