[Basic knowledge of car]Precautions for long-distance driving

As the burden of long-distance driving of vehicles is higher than that of short-distance driving in normal days, a simple full-vehicle inspection must be done before departure. The main items are: Confirmation of the abnormal sound of the chassis: if the source of the sound istransmission shaft(Internal or external constant velocity joints, the symptom of the failure of the external constant velocity joints is the continuous knocking sound from the wheel when turning or turning. The internal constant velocity joints can be manually tested for their gap), it is recommended to replace it before driving. Because most of the domestic scenic spots are located in mountainous areas with winding paths and complex road conditions, such road conditions will cause constant velocity joints to be in a state of vigorous exercise, and the load is several times that of ordinary urban driving. To prevent the constant velocity joint from cracking, it is recommended to replace it. Check the cooling water: Going up the mountain to enjoy the snow is the highlight of many people's travels, and the night temperature in these places is usually below 0°C.Pure water freezes at such a low temperature; excellentantifreezeNot only can it effectively reduce the freezing point of water (the freezing point can be as low as -64°C), it also has the functions of increasing the boiling point and protecting the pipeline and related parts. At low temperatures, there is no antifreeze in the cooling water, or the concentration of antifreeze is insufficient, the engine andWater tankWill be broken. Every year during the snow season, many cars with broken water tanks are towed down the mountain. Check the battery condition: The discharge efficiency of the car battery is best at 25°C. When the surrounding temperature drops below 10°C, the efficiency will drop sharply. This is the reason why some cars are normal on flat ground and cannot start their engines when driving in a cold mountainous area. If the battery voltage is lower than 12.2 volts after the flame is turned off for 2 hours, you must replace or bring a spare battery before going up the mountain. Tire pressure: abnormal tire pressure can easily cause traffic accidents. In addition to checking the tire pressure before setting off, you may wish to touch it with your hands every time you stop and rest.tireOn the surface, feel it with experiencetiretemperature. If the temperature difference between the four tires is too large, be extra careful with the tire with the highest temperature. When it is impossible to find out the specific reason, reduce the vehicle speed and continuous driving time. Dealing with potential failures: If there are some parts that are likely to be impaired, and these parts will affect the normal operation of the engine, it is best to replace them before long-distance travel.