Items to absolutely check and guides to avoid pitfalls for 100,000 km maintenance
Some time ago, a friend's car crossed the 100,000 mark miles (over 6 years ago) and he complained. about this. The 100,000-kilometer maintenance costs the 4S store more than 4,000 yuan. And this price does not include the price of tire replacement. As soon as he heard it, he knew he had been deceived. After buying a car, many people don't know when to maintain it, or even over-maintain it. Money is spent but the effect is not achieved. When a car reaches a mileage of 10 W kilometers, it can be said to be the turning point between youth and middle age. Serious maintenance and inspections must be carried out at this turning point. Below we'll talk specifically about the must-have inspection items for 10W of maintenance miles as well as some unnecessary digging items.
1. Essential items for 100,000 kilometers of maintenance
(1) The engine oil change and the three filters are essential items for each maintenance in order to lubricate the main power train and the cooling of the Engine oil is certainly one of the essential elements of maintenance at the 10w mileage level. Almost every car owner knows this.
(2) Change the engine oil. However, many novice car owners are unaware of the mileage intervals for oil changes. Simply put, the mileage interval between engine oil changes can be changed every 5,000 to 10,000 kilometers. Time intervals vary depending on the quality of engine oil used. For example, regular mineral oil can be replaced every 5,000 kilometers and semi-synthetic oil every 7,500 kilometers. Full synthetic motor oil can bere replaced every 10,000 kilometers. If the mileage is particularly low (less than 5,000 kilometers per year), the principle of replacement once a year should also be followed.
A little tip: changing the engine oil and oil filter on time and as needed is one of the most important keys to ensuring the good life of your car.
(3) Replace the transmission oil. No matter what type of transmission your car uses, manual, automatic, AT, dual clutch, CVT, AMT, etc. When the mileage is 10W kilometers, it is a must-have item.
Although they are both lubricants, the replacement intervals for transmission oil and engine oil are very different. The working environment of engine oil is much worse than that of transmission oil (part of the burned oil and gas will escape into the engine oil), so the replacement cycle is longer.s short. Gearbox oil is mainly recycled in a closed space. It is rarely affected by external factors and can be maintained in a relatively stable operating state for a long time. The replacement mileage is much longer than that of engine oil. There are even service manuals for some models stating that the transmission oil is maintenance-free and does not need to be replaced (such as Nissan's CVT transmission and BMW's ZF 8AT transmission).
However, the movement characteristics of metals and gears determine that there will be wear after long-term use. Therefore, when driving 10 km kilometers, the transmission oil already contains a large number of metal particles, and the lubrication effect is greatly reduced, continued use will accelerate the wear of the internal parts of the box of speeds, et some serious cases can even block solenoid valves and oil lines, etc. Regardless of safety or fuel economy, replacement is the best choice.
A little advice: Use a circulation machine or dismantle the oil pan to put it back more carefully. It is best to replace it with the transmission filter element.
(4) Replace the generator and fan belt. The generator and fan belts are elastic rubber parts. After working for 10 W kilometers, they will become longer and extend many small cracks, basically reaching the state of replacement fatigue, so they need to be replaced.
In general, the ultimate life of a belt is 12 to 15 W kilometers. A belt after 10 W kilometers is like a time bomb. Once it breaks on the road, the engine may stall and fall into disrepair.failure (the battery cannot do it). meet power demand once the battery runs out of power). More serious, the water temperature is too high, causing abnormal wear inside the engine (the water tank fan cannot work properly to dissipate heat).
A little tip: if the tensioner working with the belt is working correctly, it does not need to be replaced, otherwise it must be replaced together with the belt.
(5) Replace the spark plug. Depending on the engine fuel injection method and spark plug type, the spark plug replacement mileage for different cars is different. Some need to be replaced every 4 W kilometers, and some need to be replaced every 6 W kilometers. Regardless of the fuel supply method (multiple injection, direct injection, mixed injection) and the type of spark plug used(nickel, platinum, iridium alloy, single head, double head, etc.), under the existing technical conditions, 10 W kilometers is the best spark plug catchment, it is recommended to replace it.
Even if the car idles normally after driving 10 kilometers and does not vibrate when accelerating, it is recommended to replace it. Since ablation and wear of the spark plug electrode tip is an irreversible process, the likelihood of flashover, misfires, or even burnout is significantly increased after 10w miles. Once the above problems occur, it can range from missing a cylinder to damaged engine piston. . When replacing spark plugs, you can choose the original model, or you can choose an upgraded model with the same calorific value, such as single platinum to double platinum, which is mores durable.
(6) Replace the brake fluid. Brake oil is an important part of the braking system. The replacement principle is mainly whether its water content exceeds the standard. When the water content exceeds the standard, the boiling point of the brake fluid decreases. Under certain conditions such as continuous braking, the water boils first, resulting in poor braking effect or failure. After the car has traveled 10 kilometers, the water content of most brake fluids will exceed the standard. In addition, impurities in the brake pump will also enter the brake fluid, so it is recommended to replace it.
A little tip: the formal way to change the brake fluid is to drain the oil in the brake pumps of all four wheels, and it should be bled, rather than pumping the oil from the reservoir brake oil.
(7) Replace the di assist oilrection. Most modern car steering wheels have adopted electronic power assist, but a small number of cars still use hydraulic mechanical assist. If it is a car with mechanical-hydraulic assistance, the booster oil must be replaced. The electronic booster has no booster oil and does not need to be replaced.
(8) Replace the fuel filter element. The location of the fuel filter element is different in different cars. The replacement mileage cycle is also different. Most are divided into two types. One is installed on the car chassis and then somewhere in the pipeline. There is one moreIt installs directly into the fuel tank and is integrated with the fuel pump. Whatever it is, it is recommended to replace it (or disassemble and clean it) when the mileage reaches 10W kilometers. The one integrated into the AC tankrburant can be disassembled and cleaned due to high replacement cost.
2. Items to absolutely check for 100,000 kilometers of maintenance
(1) Tire inspection and replacement. Tires are a relatively important part of the vehicle and are also a key inspection item during 10 W-kilometer maintenance. If the tire wear reaches the wear mark, a large number of cracks appear due to aging or the sidewall is damaged, it must be replaced. It can still be used in other situations, and nothing says tires need to be replaced after 10 kilometers.
(2) Inspection and cleaning of the throttle valve. When replacing the spark plug after 10W miles, the throttle valve should be inspected. If there is a lot of dirt and mud, it is recommended to clean it. Otherwise, during later use, it is easy to block the throttle valve ormaking the amount of air intake inaccurate, resulting in engine jitter and uneven acceleration.
(3) Antifreeze inspection. Car antifreeze is an important part of the engine cooling system. These days, cars are often filled with long-lasting antifreeze (more than 10 years and 20 kilometers) when they leave the factory. However, antifreeze will be consumed (evaporated and leaked) under normal circumstances. to use.
After 10 w kilometers you should check the antifreeze and the water tank. If they are missing, add them. If they leak, they need to be repaired. If water has been added during use, it is recommended to replace the antifreeze. Since the working temperature of antifreeze is relatively high, it will scale and clog the water path of the water pump, or cause corrosion and rust of the water pump when used for a long time. long period. Therefore, it is recommended to rplace and clean the water. reservoir.
(4) Inspection and replacement of the timing belt. There are two types of modern motors that drive timing cams: chains and belts. Timing chains are often maintenance-free and do not need to be replaced. The lifespan of the timing belt is generally 10 to 15 kilometers, so it is necessary to replace it. check if the official belt needs to be replaced. Timing belt replacement mileage can be determined according to the service manual.
(5) Chassis inspection. Focus on checking whether the shock absorber legs of the shock absorber system are leaking oil, ball cage ball joints are deformed or cracked, motor legs and other shock absorber washers are cracked and damaged, etc. Repair and replace according to actual situation.
(6) Inspectionand cleaning the fuel injector. After the engine has traveled 10 W kilometers, due to carbon deposits and other reasons, the atomization effect of the fuel injector has been greatly reduced during most of the operation, and the quality of the he atomization effect directly determines fuel economy and engine power. . If the car has a significant increase in fuel consumption and a decrease in power performance, it is recommended to add cleaning and maintenance of fuel injectors to the 10 W mileage maintenance. For engines with less carbon deposits on the injector, you can choose to add fuel additives as a cleaning method when refueling.
(7) Battery inspection. As a power source for the whole vehicle, the capacity and rated voltage of the battery will change after a tis 10W mileage. At this time, it is necessary to judge whether the battery needs to be replaced according to the test results. If capacity and amountThe constant voltage is greatly reduced, and accompanied by power outages such as difficulty starting in the morning, it should be replaced in time.
A common digging project in 3.4S shops and garages
As mentioned at the beginning of this article, my friend spent over 4,000 yuan on major maintenance, and a lot of 'among them were useless. . Excavation project. There are mainly the following types.
(1) Internal engine cleaning generally refers to adding a special cleaning oil to the engine oil and then draining it after a short period of operation. This is called internal engine cleaning, but it is actually one of the internal engine cleanings. digging projects. As long as your engine is maintained normallywithin 100,000 kilometers, every time you change the oil, it is actually a process of cleaning the inside of the engine. There is no need to complete this project separately. Only certain special circumstances require cleaning the interior of the engine, such as the engine oil has not been changed for a long time (more than 2W kilometers), the engine oil is particularly emulsified, the engine oil is coked. , etc.
(2) Fuel system maintenance. When the engine is idling, the additive is mixed with the fuel by pumping a bottle, and finally reaches the combustion chamber for combustion, which plays a role in cleaning the fuel system.
In fact, the effect of such cleaning of fuel oil pipes is minimal, and it is also one of the digging projects. The method we mentioned earlier to specifically clean the throttle injector is effective and realistic.isable.
(3) Brake disc polishing and maintenance package refers to polishing the brake disc by disassembling it to remove the marks on it. As we all know, after a long ride of 10 kilometers, the brake disc has more or less marks. This is due to friction between the brake disc and brake pads during operation, provided there are no particularly deep stress marks. . , no special maintenance is required. And if there are signs of stress, polishing the brake disc alone will not work. You should also inspect a series of places such as the brake pads, brake pump and mounting bolts.
(4) The general cleaning and maintenance method of the air conditioning system is to use air conditioning cleaning foaming agent to enter the air conditioning system ducts through the air inlet, summerFinally dry with hot air for cleaning and maintenance.
This project can be selected according to the actual situation. If the car air conditioning system has a relatively obvious odor and there is still no major improvement after replacing the air conditioning filter element, you can try this method. If this method still fails to eliminate the odor, you will need to disassemble and clean the fan, condenser, etc. of the air conditioning system, which constitutes a major project. Normally, regularly replacing the air conditioning filter is the best way to eliminate odors and ensure air quality in the car.
(5) Fine cleaning of the engine compartment. Many people will frown when they open the engine compartment and see the dusty cabin. Especially after 10W miles of wind and frost, the engine compartment is even more miserable. THEEngine compartment fine cleaning is a process in which the surface of the engine compartment is rinsed at high pressure using a special cleaning fluid and then dried with a high pressure gas.
After washing, the engine compartment can be considered new, but personally I do not recommend this method. Firstly, the cleaning solution can easily corrode the parts. Secondly, the high pressure water gun can damage the electrical system of the engine room if you are not careful. You may choose to use compressed air to blow away dust floating on the surface after each maintenance to ensure it is dry.
Don't be careless when performing major maintenance on a car with a mileage of 100,000 kilometers. Regardless of the specific driving environment, you cannot be careless when performing major maintenance on acar with a mileage of 100,000 kilometers. mileage of 10W kilometers. You can't save money on the must-have items and you can't ignore the important inspection items. Other recommended products often have more pitfalls than meat, and consumers must make rational judgments.
In addition, for out-of-warranty cars, you can choose a more powerful repair shop instead of a 4S workshop. The transparency and cost of repairs will be much lower.