Basic knowledge of automobile maintenance 1, afraid? Dirty?
If the parts such as fuel filter, oil filter, air filter, hydraulic oil filter and all kinds of filter screens are too dirty, the filtering effect will become worse, and too many impurities will enter the oil cylinder, which will aggravate the wear of parts and increase the possibility of failure; If the traffic jam is serious, the vehicle will not work normally. Dirty parts such as radiator of water tank, radiator of cylinder block and cylinder head of air-cooled engine, radiator of cooler, etc. It will lead to poor heat dissipation and high temperature. So, for this? Afraid of getting dirty? Parts must be cleaned and maintained in time.
2. Afraid? Is it hot?
The engine piston temperature is too high, which easily leads to overheating and melting, resulting in cylinder locking; Rubber seal, V-belt, tire, etc. Overheating, premature aging, decreased performance and shortened service life; The coils of starter, generator, regulator and other electrical equipment are overheated, which is easy to burn and scrap; Vehicle bearings should be kept at an appropriate temperature. If they overheat, the lubricating oil will deteriorate quickly, which will eventually lead to bearing burning and vehicle damage.
3. Afraid? String?
Various coupling parts in diesel engine fuel system, driving and driven gears in drive axle main reducer, hydraulic control valve block and valve stem, valve core and valve sleeve in full hydraulic steering gear, etc. It is specially treated and ground in pairs during manufacture, and the matching is very accurate. During the service life, they are always used in pairs and cannot be interchanged. Some parts that cooperate with each other, such as piston and cylinder liner, bearing bush and journal, valve and valve seat, connecting rod big head tile cover and rod body, have relatively good cooperation after a period of running-in. During maintenance, attention should also be paid to assembly in pairs, rather than assembly with each other. Drop in. .
4. afraid? Anti?
Engine cylinder gasket can not be installed backwards, otherwise it will lead to premature ablation and damage of cylinder gasket; Some piston rings with special shapes cannot be assembled reversely, and they should be assembled according to the requirements of different models. There are also direction requirements when installing engine fan blades. Fans are generally divided into exhaust and suction, and cannot be reversed, otherwise the engine will have poor heat dissipation and high temperature. For tires with directional patterns, such as herringbone tires, the footprint on the ground after installation should make the herringbone tip point backward to ensure the maximum driving force. For the two tires installed side by side, different models have different requirements, and it is not allowed to install them at will.
5. afraid? Lack?
When repairing vehicles, some small parts may be neglected, and some people even think that it doesn't matter whether they are installed or not, which is very dangerous and harmful. Engine valve keys shall be installed in pairs. If they are missing or lost, the valve will lose control and the piston will be damaged. Locking devices, such as cotter pins, locking screws, safety plates or spring pads installed on engine connecting rod bolts, flywheel bolts and transmission shaft bolts, may cause serious failures in use once they are missing; Once the nozzle used to lubricate the gear in the engine timing gear room is missing, it will lead to serious oil leakage and low oil pressure. The lack of water tank cover, oil tank cover and oil tank cover will make dust invade and aggravate the wear of various components.
6. afraid? Oil?
The paper filter element of engine dry air filter has strong hygroscopicity. If it is contaminated with engine oil, it is easy for high-concentration mixture to be sucked into the cylinder, resulting in insufficient air, increased fuel consumption, decreased engine power, and possible diesel engines? Flying car? ; If the V-belt is stained with oil, it will accelerate its corrosion and aging, and it is easy to slip, which will lead to the reduction of transmission efficiency; Brake shoe, dry clutch friction plate, brake band, etc. If it is stained with oil, it is easy to slip and work poorly, thus threatening driving safety; Oil stains on the carbon brushes of the starting motor and generator will lead to poor contact, insufficient power of the starting motor and low generator voltage. Tire rubber is very sensitive to oil corrosion. Contact with oil will soften or peel the rubber, and short-term contact will cause abnormal or even serious damage to the tire.
7. afraid? Wash?
Some beginners in driving or repairing may think that all spare parts need cleaning, but this understanding is one-sided. For the paper air filter element of the engine, when cleaning the dust on it, you can't use any oil to clean it. You can only tap it by hand or blow it from the inside to the outside with high-pressure air. For leather parts, it is not advisable to wash them with oil, but to wipe them with a clean rag.
8. Afraid? News?
If the tire casing is stored under pressure for a long time and not turned over in time, it will be deformed due to extrusion, which will affect the service life; If the paper filter elements of air filters and fuel filters are squeezed, they will be greatly deformed and cannot play a reliable filtering role; Rubber oil seal, V-belt, oil pipe, etc. It should not be squeezed, otherwise it will be deformed and affect normal use.
9. Afraid? Near fire?
Rubber products such as tire, V-belt, cylinder liner water stop ring, rubber oil seal, etc. If they are close to the fire source, they will easily deteriorate or be damaged. On the other hand, they may cause fire accidents. Especially for some diesel vehicles, it is difficult to start in cold winter, and some drivers often use a blowtorch to heat them to prevent them from burning out lines and oil circuits.
10, afraid? Repeat?
Some parts need to be used once, but individual drivers or maintenance workers don't understand them in order to save money? Taboo? Moreover, repeated use can easily lead to accidents. Generally speaking, engine connecting rod bolts, nuts, fixing bolts of imported diesel fuel injectors, cylinder liner water stop rings, sealing copper gaskets, various oil seals and sealing rings of hydraulic system, pins and cotter pins at important positions, etc., must be replaced with new products after disassembly. For the engine cylinder gasket, although no damage was found during the overhaul, it is better to replace it with a new product, because the old product has poor elasticity, poor sealing, easy ablation and damage, and the use time is short, and it is time-consuming and laborious to replace it. It is better to replace it as much as possible if there is a new product.
Automobile maintenance knowledge protects paint surface. Sunlight exposure does great damage to automobile paint. Because you like your car? Face? For car owners, they must wash their cars frequently and wax them regularly. If you want to make the protection work more thorough, it is suggested to seal the glaze or paint it and put a layer on the car paint? Crystal protective clothing? .
Pay attention to cleanliness. In the summer when windows are open, dust is easily blown into the car. After a period of time, the car will become sticky and dirty, and even smell. Plastic parts such as dashboard and door trim should be cleaned with brushes and detergents. In order to prevent cracking and aging caused by ultraviolet radiation, a layer of wax can be applied after cleaning.
Preventing tire puncture The road surface temperature is higher in summer, and the use environment of automobile tires is even worse. Therefore, we must pay attention to the inspection and maintenance of automobile tires, and regularly check the tire pressure to prevent tire puncture.
Checking the wet road surface during braking rainy season will reduce the friction coefficient between the tire and the road surface, especially when there is water on the tire tread. Therefore, it is particularly important to check the brake system from time to time and try to be prepared.
Have you taken any precautions? Burning? Summer is the high incidence period of vehicle spontaneous combustion. It is understood that improper driver operation or hidden dangers of vehicles are the main reasons for vehicle spontaneous combustion. Therefore, it is necessary to focus on checking the oil and electricity lines of the car and find that the lines should be repaired in time to prevent spontaneous combustion.
Cleverly use the air conditioner to open the window for ventilation before entering the carriage, and at the same time start the external circulation, and then turn on the air conditioner after the hot air in the car is exhausted, so that the cooling effect is faster and better. When the vehicle speed is lower than about 25km/h, the air conditioner should be placed at a lower gear to prevent power generation and air conditioning shortage. Driving in rainy days, the window glass is prone to fog, which affects the line of sight. At this time, as long as the wind direction is adjusted to the direction of the windshield and the compressor is turned on to send cold air, the purpose of effective defogging can be achieved within a few seconds.
Prevent evaporation. When the temperature is high in summer, the evaporation of oil and water will increase. Therefore, it is necessary to cover the tank cover tightly to prevent the oil pipe from leaking. Always check the water level of the water tank, the oil level and height of the crankcase, the brake fluid level in the brake master cylinder, the electrolyte density and level in the battery, etc. If there is any discrepancy, it should be supplemented and adjusted in time.
Attention? Anti-freezing? In summer, some people think that antifreeze can no longer be used, and ordinary tap water can be used instead. In fact, this is not appropriate. The specially prepared antifreeze is not only resistant to low temperature, but also resistant to high temperature. High-quality antifreeze can only be used if it boils near 200℃? . Using antifreeze in summer, the owner is not easy to get stuck in the water tank. Boiling? Be troubled by it. In addition, antifreeze also has the functions of rust prevention and scale removal. Therefore, you should choose the original antifreeze in summer. Can it play? Heatstroke prevention and cooling? The role of.
How often does the automobile gearbox oil change? Generally speaking, the calculation method of transmission oil replacement cycle is the same as that of automobile maintenance cycle, which is based on mileage or service time. If these two indicators are clearly given in the vehicle manual, they will be implemented first. If there is no such indicator in the vehicle manual or the oil change time is not clearly marked, it is generally replaced every 50,000-80,000 kilometers.
Automobile maintenance is a big problem that cannot be ignored. In addition, Xiaobian wants to remind everyone that, unlike rumors, delaying the replacement of automobile gearbox oil will cause big problems. In fact, as long as it is not delayed for too long, the impact will not be too great, but it is beneficial to change the automobile gearbox oil in time at the most appropriate time. After all, there is something wrong with the car gearbox, and the maintenance cost is very high.
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