Inventory of several common misunderstandings in car maintenance

There are always some minor problems in the car in life, and car maintenance is a technical job. There are many places to pay attention to during the maintenance process. However, some car owners like to deal with problems by themselves first, but because they are not professional The maintenance personnel in the repair process will often use some wrong maintenance methods to deal with their own cars, which often leads to their own car injuries. The following editor introduces some common car maintenance mistakes.

Do not oil the tire bolts and nuts

In wheel maintenance, a few private car owners ingeniously coat the bolts and nuts with lubricating oil in order to prevent the bolts and nuts on the wheels from rusting. After the bolts and nuts are tightened, they have self-locking characteristics. After applying lubricating oil, 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, which can cause driving accidents.

Do not wash the body with water

Interior summer is here, and it is common for private car owners to wash the body with water while wiping with a rag. What I want to remind private car owners is: The inside of the car should not be washed directly with water. Because the underside of the floor rubber pad in the cab is not a “horizontal”, the structural requirements make the grooves and through holes under the floor rubber pad of the cab very many. After rinsing with water, it either deposits in the groove and is not easy to dry, or flows from the through hole to the gearbox and other parts to cause rust. In particular, cars with better sealing performance cannot directly wash the interior of the car body with water. The correct method is to wipe with a damp cloth, but avoid stagnant water.

Do not mix different brands of coolant

Everyone knows that the engine coolant should be added in time when the engine coolant is insufficient, 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 coolant of the same brand again. Because the chemical properties of different brands of coolant may be very different, for example, anticorrosives that are effective for ferrous metals often have corrosive effects on aluminum products; and antiseptics suitable for aluminum alloys are harmful to ferroalloys. Because different brands of coolants use different preservatives, they cannot be mixed.

Do not step on the accelerator when the EFI car starts

It is a habit of many drivers to step on the accelerator before starting the engine, especially when the car is started in cold winter. But this starting method is not suitable for EFI cars. An engine equipped with an electronic control fuel injection device is different from a normal 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, that is, when a cold car starts, The fuel injection control device can automatically increase the fuel supply. Therefore, it is not necessary to step on the accelerator when starting the engine of an EFI car, let alone step on the accelerator continuously before starting, otherwise the engine will start badly.

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