The conservation of cars must be scientific, but there are often problems in the maintenance of cars. Some people think that they are maintaining the car, but in fact they just do it by mistake.
The conservation expert reminds you that the following wrong care method is equivalent to destroying the car.
One, circle way waxing
The effect is poor Many people wax the body habitually in a circle, which is incorrect. The correct method of waxing is straight line, horizontal and vertical lines alternately, and then press the last one in the direction of rainwater flow, so as to achieve the effect of reducing concentric circular halo on the paint surface.
Second, too much oil
Failure When engine oil in the sump of the engine is insufficient, the friction between the bearing and the journal will be less due to the lesser amount of engine oil. 2. Lubrication is poor, which will increase the degree of wear and even cause galling. However, if the oil is too much, the crankshaft shank and the big end of the connecting rod will violently agitate while the engine is working, which will not only increase the internal power loss of the engine, but also increase the oil splashed on the cylinder wall, resulting in the failure of the oil . Therefore, the oil in the engine oil pan should be controlled between the oil dipstick and the lower reticle.
Third, the bolt is too tight
Permanently deformed cars have many fasteners connected by bolts and nuts. They should ensure that they have enough pre-tightening force, but they cannot be tightened too tightly. On the one hand, they will cause permanent deformation of the connecting piece under the action of external force; On the other hand, the permanent deformation of the bolt will occur, and the pre-tightening force will decrease, even causing slipping or breaking.
Fourth, the fan belt is too tight
Bearing load is too high in summer, and some drivers think that the tightness of the fan belt is increased and the fan belt is too tight. They do not know 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.
Fifth, the new battery is not charging
Shortening the life time The first charge of the battery is called the initial charge, and the initial charge has a great influence on the service life of the battery. If it is not recharged, it will be directly added by using “waterâ€. The capacity of the battery will not be high and the service life will be shortened; if it is directly charged, it will also shorten the service life. Usually, the initial charge of the battery is performed after charging the electrolyte and charging it with a small current for about 1 hour.
Sixth, random addition of vehicle equipment
Affecting traffic safety Private cars are the home of owners, and it is understandable to pursue comfort and luxury. However, some owners add their own hands to install various equipment in the car. If this is not properly handled, the car's performance and control are convenient. Reliability often brings adverse effects, leaving behind sequelae or affecting driving safety.
Seven, the cooling water temperature is too low
The weather of the worn engine is hot in summer. In order to prevent the engine from being overheated, some drivers blindly require the temperature of the cooling water to be as low as possible. In order to achieve the purpose of cooling, some drivers simply remove the thermostat and these practices are not correct.
Automobile engines are both afraid of heat and cold. If the cooling water temperature is too low, fuel combustion will deteriorate, fuel consumption will increase, wear and tear 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, the engine wear increases by 60%~80%, the power is reduced by 25%, and the fuel consumption increases by 8%~10%. Therefore, the temperature of the engine cooling water is not as low as possible. It should generally be controlled between 80 and 90 degrees Celsius.
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