Why do cars need maintenance

Vehicles, insurance, inspection fee, decoration fee..., the cost of buying a car in the early period is as low as 30,000 to 50,000, and as many as hundreds of millions, and the money you spend after buying a car is calculated. How much? Oil costs, various tax deeds, tolls, parking fees, maintenance fees ... and so on are all coming to you. In addition to the maintenance fee, you can save a lot of late fees by not driving or driving less, and the maintenance fee is a cost you have to pay for not driving.

Some friends said, why is this? Without driving, I don't care for it and I don't finish it. I also save money. Why do you have to say that if you don't drive, you have to spend money on maintenance? So today I and everyone from the car maintenance reasons, that is why we must give the car maintenance. (Maintenance of cars in 4S stores involves various fluids and filters, so here's our classification for you)

Why do we have to car maintenance?

First, why should you change the engine lubricant

● The role of oil:

The engine is the heart of the car. There are many metallic surfaces that rub against each other in the engine. These components move fast and have poor environment. The working temperature can reach 400°C to 600°C. Under such harsh working conditions, only qualified lubrication is available. Oil can reduce the wear of engine parts and prolong service life. What are the requirements for qualified lubricants? That is what the role of lubricants is.

1. Lubrication and friction reduction: Between the piston and the cylinder, there is a rapid relative sliding between the spindle and the bearing. To prevent excessive wear of the parts, it is necessary to establish an oil film between the two sliding surfaces. There is a sufficient thickness of the oil film to separate the surfaces of the parts that slide relative to each other, thereby reducing wear.

2. Cooling and cooling: The oil can bring heat back to the oil tank and then distribute it to the air to help the tank cool the engine.

3, cleaning and cleaning: a good engine oil can be on the engine parts of the carbide, sludge, wear metal particles through the cycle back to the oil tank, through the flow of lubricating oil, flushing parts of the working surface of dirt.

4, sealed leak-proof: oil can form a seal between the piston ring and the piston to reduce gas leakage and prevent the entry of contaminants from the outside world.

5, rust and corrosion: Lubricating oil can suck on the surface of the parts to prevent contact with water, air, acid and harmful gases and parts.

6, shock absorption buffer: When the engine cylinder port pressure rises sharply, suddenly increase the load on the piston, piston crumbs, connecting rod and crankshaft bearings, this load is transmitted through the bearing lubrication, so that the impact of the shock load to play a buffer role .

The condition of the oil directly affects the performance and life of the engine, so we must select the right oil and replace it in time.

Problems that may arise when replacing oil from time to time:

Just said that the oil's six points, under normal circumstances, the domestic sales of naturally aspirated engine models manufacturers will require users to travel 5,000 km - 15,000 km when the replacement of lubricants, while the supercharged engine models are required to travel 5000 km When the car is replaced, if the car is not open or is in a stopped state, it is best to change the oil every six months. Of course, if your environment and oil quality are good, you can extend the oil change intervals and time appropriately.

If your car passes the oil change interval without changing the oil, deteriorated or dirty engine oil will lose its lubrication. In addition, due to the use of metal chips in the engine oil after a long time, it will also cause the internal mechanical wear of the engine to increase. In severe cases, internal parts of the engine may be broken and damaged.

Second, why should change the oil filter

● oil filter function

The function of the oil filter element is to filter out the harmful impurities in the oil from the oil pan and provide the clean oil to the crankshaft, connecting rod, camshaft, supercharger, piston ring, etc., to play a role in lubrication, cooling and cleaning. This will extend the life of these components.

Problems with changing oil filter irregularly

The role of oil filter is to filter impurities, so it should be replaced together with the oil. If it is not replaced, the engine oil will not be filtered and the internal parts of the engine will be accelerated due to impurities in the engine oil.

Ps: Why doesn't some cars change the filter when changing the oil?

The situation like the problem is often seen in the first maintenance of the vehicle. Since the new engine is running in the first 1000 km, the resulting metal friction debris will be more, and although these debris can be filtered by the oil filter element, Most will still accumulate in the oil sump which holds the oil. At this time, the oil filter can still be used, so some manufacturers will not change the oil filter when changing the oil. But please rest assured that this will not affect your normal use.

Third, why should change the air filter

● The role of air filter

Air filters are devices that purify air. Dust, sand, and various impurities in the air, if directly entered into the engine cylinder combustion, will accelerate the wear of the engine, thereby reducing the life of the engine and even causing severe engine damage. The air filter's filter is divided into dry filter and wet filter. The dry filter cartridge is also the most commonly used in our vehicle. It is made of filter paper or non-woven fabric. In order to increase the air passing area, the filter element mostly processes many small wrinkles. When the filter element is slightly dirty, it can be blown with compressed air. When the filter element is seriously dirty, it should be replaced in time. In general, the air filter cartridge does not have an accurate replacement time. It is determined based on the environment in which the vehicle is used, but the replacement time does not exceed 1 year and the vehicle travel distance does not exceed 15,000 km.

Problems with occasional air filter replacement

If the filter plug is severely blocked, the intake resistance will increase and the engine power will drop. At the same time, due to the increase in air resistance, the amount of gasoline that is sucked in will also be increased, resulting in too high a mixture ratio, thereby deteriorating the engine operating state, increasing fuel consumption, and also tending to produce coke. Usually should develop the habit of constantly checking the air filter element.

Fourth, why should change the air conditioning filter

● The role of air conditioning filter

Just now everyone said that it is an air filter. The following is what we say is the air conditioning filter. Its role is to filter the outside air, so as to ensure that the air in the car is fresh and there is no odor. In summary, the air-conditioning filter has the following functions:

1. Ensure that unfiltered air enters the compartment as little as possible.

2, can filter air, dust, pollen, abrasive particles and other solid impurities.

3, can absorb harmful substances and moisture in the air.

4. It can ensure that the air in the driving room is clean without bacteria, and pollen can be effectively intercepted to ensure that drivers and passengers do not have allergic reactions and affect driving safety.

Problems with occasional replacement of air conditioning filter cartridges

The function of the air-conditioning filter element is to filter the air, but after a long period of use, the amount of air that can be filtered by the air-conditioning filter element is reduced. At this time, we may use the air-conditioning system and may feel that the wind blown out from the air outlet is not so strong or so large; otherwise, it is in a humid environment. Under the air filter, it is easy to mold and grow bacteria, resulting in the appearance of musty or odor when using air conditioners. In addition, there may be activated carbon in the air-conditioning filter element. The adsorption and filtration of the activated carbon for a long time will also be reduced. Therefore, the air-conditioning filter element needs to be replaced regularly, and it can be replaced once a year.

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