NEWS CENTER

1. The quality of brake pads

First, you need to check the quality of the brake pads you have chosen. Good brake pads not only provide better braking performance, but also reduce noise and vibration when braking. If the brake pads you choose are of low quality, there may be abnormal noise. Therefore, it is recommended that you must choose a brand with reliable quality when choosing brake pads, or it will be too late to regret.

2. Improper installation

If there is no problem with the quality of the brake pads, it is likely that the abnormal noise is caused by improper installation. When replacing the brake pads, it is important to ensure that each component is installed correctly and that the tightening screws are properly tightened. If you're not following your car manufacturer's instructions when replacing brake pads, there's a good chance you've got a squeaking problem. Therefore, it is recommended that you read the operation manual carefully and follow the instructions when replacing the brake pads.

In fact, the full name of the run-flat tire is a run-flat tire, and the English abbreviation is RSC. Generally, if the tire with the RSC logo is printed on the tire wall, it is a run-flat tire.

Although many people habitually refer to run-flat tires as run-flat tires, this does not mean that run-flat tires will not blow out at all. For this point, we must first clarify the function of run-flat tires, that is, to ensure that the vehicle can still travel at a relatively low speed for a certain distance by relying on thick tire walls and internal structural support in the event of a tire leak or lack of air. To put it simply, run-flat tires are not explosion-proof, just because the tire wall has been treated, so the chance of explosion-proof is small. In the case of air leakage, lack of air or bulging, it is still necessary to replace the tire in time.

Some cars' brake discs are prone to rust? In fact, the brake discs of most cars will rust, because as long as the brake discs are made of steel, they will rust, and almost 95% of the brake discs on the market are made of steel, so they will rust, and few high-end cars have ceramics. Brake discs, carbon ceramic brake discs and carbon carbon brake discs, of course, the latter two already belong to the category of supercars.

In fact, very few cars have ceramic discs! Brake discs are divided into carbon fiber ceramic brake discs and metal (cast iron) brake discs according to different materials. We know that carbon fiber ceramics do not rust, and gray cast iron is easy to corrode. Of course, due to high production costs, carbon fiber ceramic brake discs have poor braking force at low temperatures. Family cars are rarely used, so the reason for the material may be relatively small.

However, some manufacturers process metal brake discs into carbon fibers in order to increase the ability to resist heat inhibition. Combining the advantages of the two, this brake disc is not easy to rust. Our ordinary cars basically use semi-metal brake discs, but there is a phenomenon that everyone I'm all looking at it, German cars and American cars are washed, but after the car is washed clean, the brake discs are rusted.

Whether there will be brake discs, but this does not mean that the car is good or bad. It is mainly due to the requirements of different car manufacturers for car production and driving experience, the choice of brake disc materials, ceramic brake discs, this kind of brake discs are all super run equipped.

Ceramic brake discs are not ordinary ceramics, but carbon fiber and silicon carbide synthesized at a high temperature of 1700 degrees. The biggest advantage of reinforced composite ceramics is that they can effectively resist thermal decomposition, and the braking effect is better when driving at high speeds. The heat resistance is better than that of ordinary brake discs. Many times higher, but the price is dozens of times higher than cast iron brake discs, generally tens of thousands.

The current anti-corrosion technology is nothing more than painting, surface treatment, electroplating, chemical, cathodic anti-corrosion and other methods, while body anti-corrosion is nothing more than "painting" process, galvanizing or oil spraying on the body, chassis and other items to isolate oxidation reactions, but they Can it be used on brake discs?

Of course not, this is where friction often occurs. If the material is not replaced, no matter how thick the coating is, it will wear out, let alone reduce friction. Cars that have not been used for a long time are most likely to rust, because the brake discs that have not been used for a long time There is a lot of dust in the area, vacuuming, the dust that falls on the brake disc will absorb moisture from the air after a long time.

When exposed to oxygen in the air, an oxidation reaction will occur, which we call rusting. Iron is easily oxidized in the presence of sufficient air (oxygen) and moisture. High places are also prone to rust.

In fact, it is not that some brake discs are not good for braking, but that some people use their cars more, such as those friends who commute every day, their brake discs have no chance of rusting, right? For an infrequently used car, in this rusty weather, its brake discs will often rust, which is normal.

As long as the car is used again, the rust will be automatically removed, no problem, so it is not that some brake discs are of good quality and rust-free as the subject said, but have a direct relationship with the use environment. Rust has little effect, in fact, the rust can be wiped off by stepping on the brakes a few times while driving.

When the brake disc is seriously rusted, normal braking cannot achieve a perfect derusting effect. When the brake disc is very rusted, the surface of the brake disc will be uneven. In this case, the brake will cause the body to vibrate, and the owner will obviously feel If the steering wheel is abnormal, the body and brake pedal, in this case, you have to go to a special workshop to remove the rust on the brake disc.

First, the thickness of the brake pads can be checked. The thickness of the new brake pads is about 15 mm. After a long time of use, the brake pads will become thinner and thinner due to wear. If you find that the thickness of the brake pads is only about one-third of the original, that is, about 5 mm, you can consider replacing the brake pads.

Secondly, you can also feel the wear of the brake pads by stepping on the brakes. If you step on the brakes in normal driving and make a sizzling sound similar to the friction between iron sheets and iron sheets, it can indicate that the brake pads have been severely worn and need to be replaced as soon as possible, otherwise the brakes may fail. Of course, this method is still more difficult than directly looking at the thickness of the brake pads, because there are many other noises when the car is running, such as wind noise and tire noise, these noises are likely to cover up the sound of the brake pads when the brakes are applied . In addition, for some old drivers with rich driving experience, the degree of wear of the brake pads can also be judged by the foot feel of the brakes. Replaced in time.

So, is it necessary to choose the original factory to replace the brake pads? This is actually not necessarily the case. The most important thing is to look at the quality and performance of the brake pads, as long as these two points are met. Secondly, pay attention to the friction coefficient when replacing the brake pads. If it is too high, it will easily cause the wheel to lock, and if it is too low, it will easily fail to brake. Choose a moderate friction coefficient. Of course, the comfort of the brake pads must also be considered. For example, some brake pads make a lot of noise when stepped on, and even smoke, odor, dust, etc. Such brake pads are obviously unqualified and should be replaced as soon as possible.

1. Look at the trademark: carefully check the trademark, whether the factory name, factory address, grade and anti-counterfeiting marks on it are true. Because for counterfeiters with short-term behaviors, the production of anti-counterfeiting marks is not an easy task, and it takes a lot of work. In addition, in the production of products, regular manufacturers have hard stamps and chemical marks on the surface of spare parts, indicating the serial number, model, and date of manufacture of the parts. Generally, automatic printing is used. The letters are arranged neatly and the handwriting is clear. Factories and small workshops generally cannot do this.

2. Look at the packaging: Auto parts are highly interchangeable and have high precision. In order to store them for a long time without deterioration or rust, they need to be coated with low-acid oil before leaving the factory. Regular manufacturers also have very strict requirements on packaging boxes, requiring no acidic substances and no chemical reactions, and some use hard transparent plastic vacuum packaging. Sophisticated packaging can increase the added value and value of products. Most of the boxes and boxes use anti-counterfeiting marks. Commonly used are laser, barcode, hidden printing, etc. These are very important when purchasing accessories.

3. Read the documents and materials: Be sure to check the product manuals of auto parts. The product manuals are the information that the manufacturer further promotes the product to the user, makes certain reminders for the user, and helps the user to use the product correctly. The user's trust in the product can be enhanced through the product manual. Generally speaking, each accessory should be equipped with a product manual (the manufacturer on the right is equipped with user instructions). If the transaction volume is quite large, it is also necessary to inquire about the technical appraisal data for imported accessories and the customs import declaration data. The state stipulates that imported goods should be accompanied by Chinese descriptions. Some counterfeit imported accessories generally do not have Chinese descriptions, and the foreign language on the packaging may not be grammatical, or even spelled wrong words. You can tell the authenticity at a glance.

4. To identify metal mechanical parts, you can check the surface treatment: the so-called surface treatment, that is, electroplating process, painting process, electric welding process, and high-frequency heat treatment process. The surface treatment of auto parts is the back-end process of parts production, and the back-end process of commodities, especially the surface treatment, involves many modern science and technology. Large international and domestic manufacturers have invested a lot of money in the use of advanced technology, especially in the post-processing technology. The investment funds range from several million yuan to tens of millions of yuan. Some small factories and handicraft workshops that manufacture counterfeit and shoddy products have a common feature, that is, they adopt low-investment predatory short-term operation behaviors, rarely invest technology and funds in the post-processing technology of products, and do not have the ability to invest such funds.

1. Make the car stop after driving 10 kilometers on a road with poor road conditions, and touch the shock absorber shell with your hands. If it is not hot enough, it means that there is no resistance inside the shock absorber and the shock absorber does not work. At this time, you can add appropriate lubricating oil, and then carry out the test. If the shell is hot, it means that the shock absorber is short of oil inside, and you should add enough oil; otherwise, it means that the shock absorber is invalid.

2. Press the bumper hard and then release it. If the car jumps 2-3 times, it means the shock absorber works well.

3. When the car is running slowly and brakes suddenly, if the car vibrates violently, it means that there is something wrong with the shock absorber.

4. Remove the shock absorber and stand it upright, and clamp the lower connecting ring on the vise, pull and press the shock absorber several times. At this time, there should be stable resistance, and the resistance of pulling upward should be greater than that of downward If the resistance is unstable or there is no resistance, it may be that the shock absorber is short of oil or the valve parts are damaged, and the parts should be repaired or replaced.