What are the wrong maintenance methods that are equivalent to destroying the car?

 To protect a car must be scientific. However, there are often some problems in car maintenance. Some people thought that they were caring for the car, but in fact they accidentally damaged the car. Maintenance experts warn that the following 12 wrong maintenance methods are equivalent to destroying the car.

First, the car wash under the scorching sun - injury paint

Many car owners like to wash their cars under the scorching sun. They think that the water on the body will be dried quickly after washing. In fact, it is wrong to wash the car under the scorching sun. The convex lens effect formed by the water droplets will cause local high temperature phenomenon in the uppermost layer of the paint. After a long time, the paint will lose its luster. If waxing at this time, it is easy to cause uneven color of the body. Therefore, car washing and waxing is best carried out under cover conditions. If it is not guaranteed, it is best to choose it on a cloudy or sunny morning or in the evening.

Second, car wash like a bath - harmful air conditioning

In summer, the temperature rises, the dust increases, the body is easy to get dirty, and the frequency of car washing is also beginning to rise. Many car owners also hope to make a thorough bathing when they wash their cars. However, it should be noted here that it is necessary to keep the appearance of the car air conditioner dry. If the car air conditioner is accidentally wet, it will affect the life of the car air conditioner.

Third, the way of waxing - the effect is poor

Many people wax the body habitually in a circle, which is not the right way. The correct way of waxing is to make the straight line, the horizontal and vertical lines alternate, and then the last one in the direction of rainwater flow, so as to reduce the effect of reducing the concentric circular aura on the paint surface.

Fourth, too much oil - failure

When the oil in the engine oil sump is insufficient, the friction between the bearing and the journal will be poorly lubricated due to the small amount of oil, which will aggravate the degree of wear and even cause a burnt shaft accident. However, if there is too much oil, the crankshaft shank and the big end of the connecting rod will produce severe agitation when the engine is working, which not only increases the internal power loss of the engine, but also increases the oil splashed on the cylinder wall and causes the burning oil to malfunction. . Therefore, the oil in the engine oil sump should be controlled between the upper and lower scribe lines of the oil dipstick.

Five, the bolt is too tight - permanent deformation

There are many fasteners connected to bolts and nuts in the car. It should be ensured that it has sufficient pre-tightening force, but it cannot be tightened too tightly. If it is tightened too much, on the one hand, the connecting piece will be permanently deformed under the action of external force; on the other hand, the bolt will be stretched and permanently deformed, and the pre-tightening force will be decreased, and even the buckle or the broken phenomenon will be caused.

Sixth, the fan belt is too tight - the bearing load is large

In summer, the temperature is too high. Some drivers think that increasing the tightness of the fan belt can improve the engine cooling effect. Therefore, the tension of the fan belt is increased and the fan belt is too tight. It is not known that this is not the case. The fan belt should be kept tight, because over-tightening will overload the bearing, increase wear and increase power consumption, and will also bend the pump shaft, lengthen the belt and shorten the life.

Seven, imported tires - not applicable

Some people buy tires and particularly like to emphasize "imports." The most fatal flaw in the domestic push of new tires for domestic users is that it is not applicable. The smooth road surface in Europe is quite different from the road conditions in Beijing's Second Ring Road and Third Ring Road. The tires suitable for European road conditions are difficult to perform in Beijing. Especially the impact resistance of the sidewall is obviously not acclimatized, just like wearing Italy. Brand-name leather shoes take the stone road in general, and the sidewalls are inevitable. After the domestic joint venture production of some foreign brand tires, a layer of cord fabric was added to the side of the tire according to the domestic road conditions, which greatly enhanced the impact resistance of the sidewall. The joint venture tires can completely replace the imported goods in terms of performance. .

Eight, the new battery is not charging - shorten the life

The first charge of the battery is called the first charge, and the initial charge has a great impact on the battery life. If it is not charged, it will be directly used by adding "water". The capacity of the battery will not be high and the life will be shortened. If it is directly charged, the life will be shortened. Usually, the initial charge of the battery is installed after the filling of the electrolyte, and charging with a small current for about 1 hour.

Nine, the car equipment is free to add - affect driving safety

Private cars are the home of mobile owners. It is understandable to pursue passenger comfort and luxury. However, some car owners do their own to install various equipment in the car. This kind of modification, if not handled properly, is convenient and reliable for car performance and handling. Bringing adverse effects, leaving behind sequelae or affecting driving safety.

Ten, the cooling water temperature is too low - wear engine

In summer, the weather is hot. Some drivers want to prevent the engine temperature from being too high. The temperature of the cooling water is required to be as low as possible. Some drivers simply remove the thermostat for the purpose of cooling. These are all wrong.

Automobile engines are both hot and cold. If the temperature of the cooling water is too low, the fuel combustion will deteriorate, the fuel consumption will increase, the wear will be aggravated, the viscosity of the oil will increase, and the engine power will decrease. Tests show that when the temperature of the cooling water is 40-50 degrees Celsius, the engine wear increases by 60%-80%, the power decreases by 25%, and the fuel consumption increases by 8%-10%. Therefore, the temperature of the engine cooling water is not as low as possible, and should generally be controlled between 80-90 degrees Celsius.

11, the water tank "open pot" speed water - cylinder cracking

The summer weather is hot. Some drivers see the phenomenon of “opening the pot” when they see the water tank. They are worried that the engine temperature will rise again and immediately turn off the fire and add water. This is wrong, and it is very likely that the cylinder head will crack due to sudden cold.

If you encounter the water tank "opening the pot", the general correct method is: stop immediately, let the engine keep idle and idle to continue to dissipate heat; at the same time open the engine cover to improve the heat dissipation speed. After the temperature of the cooling water is lowered, the engine is turned off. At this time, if the amount of cooling water is insufficient, it should be added slowly to prevent the cylinder head from cracking due to sudden cold.

Twelve, long-term no car or short-distance car - damage to the machine

Some people have become car owners, but they usually don't want to drive. They only drive out when they are on vacation. In fact, such a car is very hurtful. The surface of the transmission parts such as the engine and the gearbox will rust due to the direct contact with the air, and the battery will also have a long service life due to long-term natural discharge. The best way is to run the car every few days and run for thirty or forty minutes. In addition, always use a car for short-term use will also hurt the car, the car is always moving but not far away, is an important reason for the injured car.

The on-board components wear most during the engine's start-up to stable phase. The power consumed to start a car's battery also takes about 20 minutes to make up. This car habit can easily cause the car to get out early.