【Car owner’s home car knowledge】Car maintenance must be scientific. However, some problems often occur during car maintenance. Some people originally thought they were maintaining their car, but in fact they damaged their car. Maintenance experts remind the following 12 incorrect maintenance methods that can destroy your car.
1. Washing the car under the hot sun - damaging the car paint
Many car owners like to wash their cars under the scorching sun, thinking that the water on the car body can be dried quickly after washing. In fact, it is wrong. When you wash your car under the scorching sun, the convex lens effect formed by the water droplets will cause local high temperature in the top layer of the car paint. Over time, the car paint will lose its luster. If waxing is done at this time, it will easily cause uneven color of the car body. Therefore, it is best to wash and wax your car under sheltered conditions. If this cannot be guaranteed, it is best to do it in the morning or evening on a cloudy or sunny day.
2. Washing a car is like taking a shower - it harms the air conditioner
In summer, the temperature rises, the dust increases, and the car body becomes dirty easily. The frequency of car washing by car owners also begins to increase. Man
【Car owner’s home car knowledge】Car maintenance must be scientific. However, some problems often occur during car maintenance. Some people originally thought they were maintaining their car, but in fact they damaged their car. Maintenance experts remind the following 12 incorrect maintenance methods that can destroy your car.
1. Washing the car under the hot sun - damaging the car paint
Many car owners like to wash their cars under the scorching sun, thinking that the water on the car body can be dried quickly after washing. In fact, it is wrong. When you wash your car under the scorching sun, the convex lens effect formed by the water droplets will cause local high temperature in the top layer of the car paint. Over time, the car paint will lose its luster. If waxing is done at this time, it will easily cause uneven color of the car body. Therefore, it is best to wash and wax your car under sheltered conditions. If this cannot be guaranteed, it is best to do it in the morning or evening on a cloudy or sunny day.
2. Washing a car is like taking a shower - it harms the air conditioner
In summer, the temperature rises, the dust increases, and the car body becomes dirty easily. The frequency of car washing by car owners also begins to increase. Many car owners also want to wash their cars as thoroughly as they do when they bathe themselves. But what should be noted here is that the appearance of the car air conditioner must be kept dry. If the car air conditioner accidentally gets wet, it will affect the life of the car air conditioner.
3. Waxing in a circle - poor effect
Many people habitually wax the car body in a circular manner, which is incorrect. The correct way to wax is in a straight line, alternating horizontal and vertical lines, and then applying the last line in the direction of rainwater flow, so as to reduce the effect of concentric halos on the car paint surface.
4. Too much engine oil - failure
When there is insufficient oil in the engine oil pan, the friction between the bearing and the journal will cause poor lubrication due to the small amount of oil, aggravating wear and even causing a shaft burnout accident. However, if there is too much oil, the crankshaft and the big end of the connecting rod will be violently agitated when the engine is working, which not only increases the internal power loss of the engine, but also increases the amount of oil splashed on the cylinder wall, causing oil burn-out failure. Therefore, the oil in the engine oil pan should be controlled between the upper and lower lines of the oil dipstick.
5. Bolts are too tight - permanent deformation
There are many fasteners connected by bolts and nuts on automobiles. It should be ensured that they have sufficient pre-tightening force, but they cannot be over-tightened. If it is overtightened, 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 pretightening force will be reduced, and even cause slippage or breakage.
6. The fan belt is too tight - the bearing load is large
The temperature in summer is too high. Some drivers think that increasing the tightness of the fan belt can improve the engine cooling effect, so they keep increasing the tightness of the fan belt, causing the fan belt to be too tight. However, this is wrong. The fan belt should be kept appropriately tight, because being too tight will overload the bearing, intensify wear, and increase power consumption. It will also bend the water pump shaft, elongate and deform the belt, and shorten its life.
7. Imported tires - not applicable
Some people especially like to emphasize "imported" when buying tires. The most fatal flaw of new tires introduced abroad is that they are not suitable for domestic users. The flat road surface in Europe is quite different from the road conditions on the Second and Third Ring Roads in Beijing. It is difficult for tires suitable for European road conditions to perform well in Beijing. Especially in terms of the impact resistance of the sidewalls, they are obviously not adapted to the local conditions. Just like wearing Italian brand-name leather shoes when walking on gravel roads, sidewall bumps are inevitable. After some foreign brands of tires are produced in domestic joint ventures, a layer of cord fabric is added to the side of the tire according to domestic road conditions, thereby greatly enhancing the impact resistance of the sidewall. The tires produced by joint ventures can completely replace imported goods in terms of performance.
8. New batteries do not charge - shorten their lifespan
The first charge of the battery is called the initial charge. The initial charge has a great impact on the service life of the battery. If it is not charged, that is, if "water" is added and used directly, the battery capacity is not high and the lifespan will be shortened; if it is charged directly, the lifespan will also be shortened. Usually, the initial charging of the battery is after filling the electrolyte, charging with a small current for about 1 hour, and then it can be installed and used.
9. Adding equipment in the car at will - affecting driving safety
A private car is the owner's mobile home, and it is understandable to pursue comfort and luxury. However, some car owners themselves install various equipment in the car. Such modifications, if not handled properly, often have adverse effects on the performance of the car and the convenience and reliability of operation, and can easily leave sequelae or affect driving safety.
10. Cooling water temperature is too low - engine wear
The weather is hot in summer. In order to prevent the engine temperature from being too high, some drivers blindly require the cooling water temperature to be as low as possible; some drivers simply remove the thermostat in order to achieve the purpose of cooling. These practices are wrong.
Car engines are afraid of both heat and cold. If the cooling water temperature is too low, fuel combustion will deteriorate, fuel consumption will increase, wear will increase, oil viscosity will increase, and engine power will decrease. Tests have shown that when the cooling water temperature is 40-50 degrees Celsius when the car is driving, engine wear increases by 60%-80%, power decreases by 25%, and 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 and 90 degrees Celsius.
11. The water tank is "boiled" to quickly add water - the cylinder cracks
The weather is hot in summer. When some drivers see the water tank "boiling", they are worried that the engine temperature will rise again, so they immediately turn off the engine and add water. This approach is wrong, and it is very likely to cause the cylinder head to crack due to sudden cold.
If you encounter a "boiled" water tank, the generally correct method is to stop the vehicle immediately and let the engine idle at idling speed to continue dissipating heat; at the same time, open the engine hood to increase the heat dissipation speed. After the cooling water temperature drops, turn off the engine. If the amount of cooling water is insufficient at this time, it should be added slowly to prevent the cylinder head from cracking due to sudden cold.
12. If the car is not used for a long time or used for short distances - the machine parts are damaged
Although some people have become car owners, they are "reluctant" to drive and only drive out for fun during holidays. In fact, this way of using cars is very harmful to the car. The surfaces of transmission parts such as engines and gearboxes will rust due to constant direct contact with air, and the battery life will also be affected by long-term natural discharge. The best way is to run every few days for thirty or forty minutes. In addition, always using the car for short distances will also cause damage to the car. The car is always moving but cannot drive far, which is an important reason for damage to the car.
The vehicle's mechanical parts are most severely worn between the engine startup and the stable stage. It takes about 20 minutes of driving to replenish the power consumed by the battery once the vehicle is started. Such driving habits can easily cause the vehicle to break down early.
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