【Owner's home car knowledge】There will always be some small problems in the car in life, and car maintenance is a technical job. There are many points that need to be paid attention to during the maintenance process. However, some car owners like to deal with problems by themselves first, but because they are not professional Maintenance personnel often use some wrong maintenance methods to deal with their own cars during the repair process, which often leads to additional injuries to their cars. The editor below introduces some common car maintenance mistakes.
Do not oil the tire bolts and nuts
In wheel maintenance, a small number of private car owners ingeniously apply lubricating oil to the bolts and nuts on the wheels in order to prevent the bolts and nuts on the wheels from rusting. Little do they know that this practice is not only wrong, but also brings certain hidden dangers to driving safety. After the bolts and nuts are tightened, they have the characteristics of self-locking each other. After the lubricating oil is applied, the self-locking coefficient between the two becomes smaller, and the self-locking performance decreases. When the car is running at high speed, the bolts and nuts are easy to loosen or even fall off, causing traffic accidents.
Do not wash the body with water
Internal summer is here, and it is common for private car owners to wash the body with water while wiping it with a rag. Here, I would like to remind private car owners that it is best not to wash the interior of the car body directly with water. Because the bottom of the floor rubber pad in the cab is not "a flat river", the structural requirements make there are many grooves and through holes under the floor rubber pad of the cab. After rinsing with water, it is either deposited in the groove and is not easy to dry, or it flows from the through hole to the gearbox and other components to cause rust. Especially cars with better sealing performance cannot directly wash the interior of the body with water. The correct way is to wipe with a damp cloth, but avoid water accumulation.
Do not mix coolants of different brands
Everyone knows that when the engine coolant is insufficient, it should be added in time, but have you used different brands of coolant together? If so, I advise you to drain the coolant as soon as possible and add the same brand of coolant again. Because the chemical properties of different brands of coolants may vary greatly, such as anti-corrosion agents that are effective for ferrous metals, they often have a corrosive effect on aluminum products; anti-corrosion agents that are suitable for aluminum alloys are harmful to ferroalloys. Since different brands of coolants use different preservatives, they cannot be mixed.
Do not step on the accelerator when the EFI car starts
It is the habit of many drivers to step on the accelerator a few times before starting the engine, especially when starting a cold car in winter. But this starting method is not suitable for EFI cars. The engine equipped with electronically controlled fuel injection device is different from ordinary carburetor engine. Its fuel injection control device can automatically adjust the fuel supply according to the temperature and working conditions of the engine, so that the engine can start smoothly. The fuel injection control device can automatically increase the fuel supply. Therefore, when the EFI car engine is started, it is not necessary to step on the accelerator, let alone step on the accelerator continuously before starting, otherwise the engine will start poorly.
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