[修理知识]Several mistakes in car maintenance law

Many private car owners like to wash the car in the sun, thinking that the water on the car body can be dried soon after washing. In fact, when washing the car in the sun, the convex lens effect formed by the water will cause local high temperature in the top layer of the car paint Phenomenon, after a long time, the car paint will lose its luster. If it is waxed at this time, it will also easily cause uneven color of the car body. Therefore, it is best to wash and wax the car in a sheltered condition. If it cannot be guaranteed, it is best to choose it in the morning and evening when it is cloudy or sunny.

Washing the car is like taking a bath-harming the air conditioner

When the weather rises, the temperature increases, the dust increases, and the car body is easy to get dirty. The frequency of car owners washing their cars also starts to increase. Many car owners also hope to wash their cars thoroughly like bathing themselves.But the thing to note here is that you must keepCar Air ConditionerThe appearance is dry, ifcarIf the air conditioner gets wet accidentally, it will affect the life of the car air conditioner.

Waxing in a circle-poor effect

Many people are accustomed to waxing the car body in a circle, which is not the correct method. The correct way of waxing is in a straight line, alternating horizontal and vertical lines, and then the last one in the direction of rainwater flow, so as to reduce the effect of concentric circles on the paint surface.

Too much oil-malfunction

When the oil in the engine oil pan is insufficient, the friction between the bearing and the journal will be poorly lubricated due to the small amount of oil, aggravating the degree of wear, and even causing a bush-burning accident.However, if the engine oil is too much, the engine is workingCrankshaftThe handle and the big end of the connecting rod will produce violent agitation, which not only increases the internal power loss of the engine, but also increases the oil splashing on the cylinder wall, causing oil burning failure. Therefore, the oil in the engine oil pan should be controlled It is better to place it between the upper and lower engraved lines of the oil dipstick.

Bolt too tight-permanent deformation

There are many fasteners connected by bolts and nuts on automobiles, and it should be ensured that they have sufficient pre-tightening force, but they should not be over-tightened. If they are over-tightened, on the one hand, the connecting parts will be permanent under the action of external force. Deformation; on the other hand, it will cause the bolt to produce tensile permanent deformation, and the pre-tightening force will drop, and even cause the phenomenon of sliding or breaking.

fanbeltToo tight—heavy bearing load

Some drivers think that increasing the tightness of the fan belt can improve the cooling effect of the engine, so they keep increasing the tightness of the fan belt, causing the fan belt to be too tight, but they don't know that this is wrong. The fan belt should be kept tight. Because over-tightening will cause excessive load on the bearing, increased wear, and increased power consumption, it will also causeWater pumpThe shaft is bent, the belt is elongated and deformed, and the life is shortened.