100000 km maintenance items and pit avoidance guide

100000 km maintenance items and pit avoidance guide

Some time ago, my friend's car stepped into the100000 km mark (more than six years), and Tucao said that it would cost more than 4000 yuan to do100000 km maintenance in a 4S shop. Moreover, this does not include the price of replacing tires. As soon as you listen, you will know that he has been cheated. Many people don't know when to maintain or even over-maintain their cars after buying them. The money was spent, but the effect was not achieved. When the mileage of a car reaches 10W km, it can be said that it is a watershed from youth to middle age, and serious maintenance and inspection are needed at this watershed. Let's talk about the necessary inspection items for 10W km maintenance and some unnecessary pit digging items.

65438+100000 km maintenance must be done.

(1) Oil change and three filters are essential items for maintenance, and providing lubrication and cooling oil for the core powertrain of the car is definitely one of the essential items for 10w km level maintenance, which is known by almost all car owners.

(2) change the oil. However, the mileage interval of oil change is really unclear to many small white car owners. Simply put, you can change the oil every 5000- 10000 km, and the interval is different according to the grade of oil used. For example, ordinary mineral oil should be replaced once every 5,000 kilometers and once every 7,500 kilometers in synthetic engine oil. Synthetic engine oil can be replaced every 10000 km. If the mileage is particularly small (less than 5000 kilometers a year), we should also follow the principle of replacing it once a year.

A tip: Changing the oil and engine room in time as needed is one of the most important keys to ensure the service life of your car.

(3) Change the transmission oil. No matter what type of gearbox you use, manual, automatic, at, dual clutch, CVT, AMT and so on. When the mileage is 10W km, this is a project that must be done.

Although they are all lubricating oils, the replacement mileage of gearbox oil and engine oil is quite different. The working environment of engine oil is much worse than that of gearbox oil (some burned oil and gas will run into the engine oil), so the replacement cycle is short. The gearbox oil is mostly recycled in a closed space, which is less affected by the outside world and can maintain a relatively stable working state for a long time. The replacement mileage is much longer than the oil, and even the gearbox oil in some vehicle maintenance manuals is maintenance-free and does not need to be replaced (such as Nissan CVT gearbox and BMW ZF 8AT gearbox).

However, the motion characteristics of metals and gears determine that there will be wear after long-term use. So when driving to 10w km, there are already a lot of metal particles in the gearbox oil, which greatly reduces the lubrication effect. Continued use will accelerate the wear of the internal parts of the gearbox, and some will even block the solenoid valve and oil circuit. Regardless of safety or fuel economy, replacement is the best choice.

A little tip: You can use a recycling machine or disassemble the oil pan to replace it more thoroughly. It is best to replace it together with the transmission filter.

(4) Replace the generator and fan belt. As elastic rubber parts, the generator and fan belt will become longer after working for 10w km, and many small cracks will extend, which basically reach the fatigue state of replacement and must be replaced.

Generally, the limit life of a belt is 12- 15W km. The belt after 10W km is like a time bomb. Once it breaks down on the road, the engine will stall and fail (the battery can't meet the power demand after the power is insufficient). In addition, the high water temperature causes abnormal internal wear of the engine (the fan of the water tank cannot work normally to dissipate heat).

A small tip: If the tensioner working with the belt works normally, it does not need to be replaced, otherwise it needs to be replaced with the belt.

(5) Replace the spark plug. Depending on the engine fuel injection mode and spark plug type, the spark plug replacement mileage of different cars is different. Some need to be replaced every 4 kilometers, and some need to be replaced every 6 kilometers. No matter what fuel supply method (manifold injection, direct injection and mixed injection) and spark plug type (nickel, platinum, iridium alloy, single head, double head, etc. ) are adopted. Under the existing technical conditions, 10w km is the watershed of the spark plug, so it is recommended to replace it.

Even after driving for 10w km, the car is idling normally and does not shake when accelerating, so it is recommended to replace it. Because the erosion and wear of spark plug electrode tip is an irreversible process, the probability of flashover, fire failure or even burning out after 10w km is greatly increased. Once the above problems occur, the cylinder will become shorter and the engine piston will be damaged. You can choose the original model or an upgraded model with the same calorific value to replace the spark plug, such as upgrading from single platinum to double platinum, which is more durable.

(6) Replace the brake oil. As an important part of the brake system, the principle of replacing brake oil is mainly whether its water content exceeds the standard. When the water content exceeds the standard, the boiling point of brake oil will decrease. Under certain conditions such as continuous braking, water will boil first, resulting in poor braking effect or failure. When the car is driving 10w km, the water content of most brake oil will exceed the standard, and impurities in the brake pump will also enter the brake oil, so it is recommended to replace it.

A little tip: The normal way to change the brake oil is to drain the oil where the four-wheel brake pump is used, instead of pumping oil from the brake oil pot to change the oil.

(7) Replace directional booster oil. Most of the steering wheels of modern cars have used electronic power, and a few cars still use mechanical hydraulic power. If it is a mechanical hydraulic moped, the booster oil needs to be replaced. The electronic booster has no booster oil and does not need to be replaced.

(8) Replace the fuel filter. The fuel filter elements of different cars are located in different parts. The mileage cycle of replacement is also different. Most of them are divided into two types. One is installed on the chassis of the car and then installed somewhere in the pipeline. Another one is directly installed in the fuel tank and integrated with the fuel pump. Either way, when the mileage reaches 10W km, it is recommended to replace (or disassemble and wash). Because of the high replacement cost, the one integrated in the oil tank can be disassembled and cleaned.

2 2. 10/00000 km maintenance must be checked.

(1) Inspection and replacement of tires. Tire is a piece that consumes a lot of cars, and it is also the key inspection item when 10W km carries out major maintenance. If the tire is worn to the wear line, or there are a lot of cracks due to aging, or the tire wall is damaged, it needs to be replaced. Other conditions are ok, but it is not said that 10w km tires must be changed.

(2) Check and clean the throttle valve. It is necessary to check the throttle when replacing the spark plug at 10W km. If there is too much dirt and sludge, cleaning is recommended. Otherwise, in the later use process, it is easy to cause the throttle to get stuck or the air intake is not smooth, resulting in engine jitter and unsmooth acceleration.

(3) Inspection of antifreeze. Automobile antifreeze is an important part of engine cooling system. At present, automobile factories often add long-acting antifreeze (above 65438+20KWkm in 2000), but it will be consumed (volatilized and leaked) in normal use.

10w km needs to focus on checking antifreeze and water tank. If it is missing, it should be supplemented. If it leaks, it should be repaired. If water is added during use, it is recommended to replace antifreeze. Due to the high working temperature of antifreeze, it will scale, block the water path of the pump or make the pump corrode and rust. It is recommended to replace the cleaning water tank.

(4) Inspection and replacement of timing belt. There are two kinds of timing cams driven by modern engines: chain and belt. Timing chain is often maintenance-free and does not need to be replaced, and the design life of timing belt is generally 10- 15w km, so it is necessary to check whether the formal belt needs to be replaced. The replacement mileage of the timing belt can be determined according to the maintenance manual.

(5) Inspection of chassis. Focus on checking whether the shock absorption strut of the shock absorption system leaks oil, whether the ball head of the ball cage is deformed or cracked, and whether the shock absorption washers such as engine legs are cracked or damaged. , and according to the actual situation for maintenance and replacement.

(6) Check and clean the choke. After driving mileage 10W km, the atomization effect of the fuel injector has been greatly reduced due to carbon deposition and other reasons, which directly determines the fuel economy and power performance of the engine. If the fuel consumption of the car increases obviously and the power performance decreases, it is suggested to increase the cleaning and maintenance of the oil nozzle in the maintenance of 10W km. For the engine with no serious carbon deposit in the fuel nozzle, you can choose to add fuel additives as a cleaning method when refueling.

(7) Check the battery. As one of the energy sources of the whole vehicle, the battery capacity and rated voltage will change after the test of 10W km. At this time, it is necessary to judge whether the battery needs to be replaced according to the test results. If the capacity and rated voltage are obviously reduced, accompanied by power shortage such as difficulty in starting in the morning, it needs to be replaced in time.

3.4S common pit digging projects in shops and garages.

As mentioned at the beginning of this article, that friend spent more than 4000 yuan on major maintenance, many of which were unnecessary excavation works. There are mainly the following kinds.

(1) Engine internal cleaning generally refers to adding special cleaning oil to engine oil and discharging it after a short operation, which is euphemistically called engine internal cleaning, but it is also one of the pit digging projects. As long as your engine is normally maintained within 654.38+ 10,000 kilometers, changing the oil every time is actually a cleaning process for the inside of the engine, and it is not necessary to do this project separately. Only under some special circumstances, it is necessary to clean the inside of the engine. For example, the engine oil has not been changed for a long time (more than 2wkm), the oil emulsification is particularly serious, and the oil is coking.

(2) Maintenance of fuel system. When the engine is idling, additives are mixed into the fuel by hanging bottles, and finally reach the combustion chamber for combustion, which plays a role in cleaning the fuel system.

In fact, the cleaning function of this fuel circuit is very small, and it is also one of the pit digging projects. As mentioned above, it is effective and feasible to clean the throttle nozzle specially.

(3) Brake disc polishing maintenance package refers to polishing by removing the marks on the brake disc. As we all know, after a long-distance driving of 10w km, there will be more or less marks on the brake disc, which is caused by the friction between the brake disc and the brake pad at work. As long as there are no particularly deep strain marks, there is no need for special maintenance. However, if there are traces of strain, it is useless to just polish the brake disc, and a series of places such as brake pads, brake pumps and fixing bolts need to be inspected.

(4) The general practice of air conditioning system cleaning and maintenance is to use air conditioning to clean the foam agent and pump it into the air conditioning system pipeline through the air inlet, and finally dry it with hot air for cleaning and maintenance.

This project can be selected according to the actual situation. If the automobile air conditioning system has obvious odor and there is still no big improvement after replacing the air conditioning filter, you can try this method. If this method still can't remove the odor, it is necessary to disassemble and clean the fan and condenser of the air conditioning system, which is a big project. Under normal circumstances, replacing the air conditioner filter regularly is the best way to remove odor and ensure the air quality inside the car.

(5) Fine cleaning of engine compartment. Many people frown when they open the engine room and see the dusty engine room, especially after the wind and frost of 10W km, the engine room is even more terrible. Fine cleaning of engine compartment is a process of high-pressure cleaning of engine compartment surface with special cleaning solution, and finally drying with high-pressure gas.

After washing, the engine compartment can be said to be brand new, but personally this method is not recommended. One is that the cleaning liquid is easy to corrode parts, and the other is that the high-pressure water gun may damage the electrical system in the engine room if it is careless. After each maintenance, you can choose to blow off the floating ash on the surface with compressed air to ensure dryness.

We can't be careless about the maintenance of a car with a mileage of100000 km. No matter what the specific car environment is, the maintenance of a car with a mileage of 10W km cannot be sloppy, and it cannot save money on necessary items and leave important inspection items behind. Other recommended projects often have more pits and less meat, which requires consumers to rationally distinguish.

In addition, for cars under warranty, you can choose a more powerful repair shop instead of a 4S shop, which will reduce the transparency and cost of maintenance.