What you don't know about brake pads (below)
8. What is the quality of the facial masks purchased online?
We can't judge in reality, let alone online. The only judgment is your feedback after installation. You can choose an unmanned road section and test emergency braking at high speeds and emergency braking in rainy days a few more times, although it costs a little fuel. But it is of great benefit for you to judge the braking stability of the product in an emergency.
9. Is it because the mask has no noise, but is soft, and its lifespan is short?
Answer: No, many of these claims come from auto repair shops. There is noise, say the brake pads are hard, I will give you a soft one, there is no noise, but you are required to accept the defect of short life. If you want to have a long life like a taxi, it must be hard, you can only accept noise or grinding discs.
In fact, these statements are not accurate. In addition to the mature formula of the original car, it has the ability to ensure low noise and long life. Most of the products on the market are solely taking noise as the main goal, and they are for the so-called market demand. These products basically have a very short lifespan, about 20,000 to 40,000 kilometers. As for whether it can guarantee the safe braking distance of the owner in an emergency and the braking ability under high temperature. That needs to be judged by the owner.
10. Is it true that the brake pads of the original car have no noise?
It can only be said that the probability is extremely low. Because there are too many factors that cause noise, and the main ability of brake pads is to maintain a stable braking ability under various extreme road conditions.
11. Some brake pads are installed and you feel shaking when you step on the brakes. What's the matter? Just change to another pair. Is it because of the quality of the brake pads?
Brake pads do not cause judder. The reason for the vibration is mostly because the brake disc is deformed by alternating hot and cold under high temperature conditions or the brake disc is warped after re-disc processing, which has nothing to do with the brake pads. As for why you just changed it, it is estimated that the reason is that the latter is very compressive, and the product can absorb the warping and deformation of the brake disc.
In the supporting standard of the original car, compressibility is a very important item, which requires the compressibility of the brake pads to be between 0.1 and 0.2 mm under normal braking force, so as to ensure the response of the brake pads under emergency braking conditions. speed. Therefore, based on the above considerations, if it is enough to replace the brake pads because of vibration, you may not be happy.
12. The brake pads are installed very well at the beginning, why is there noise in the later stage?
Since the brake pad and the brake disc are a frictional pair, it is recommended to compare the performance of the brake pad after the brake pad has been used for 300-500 kilometers, because at this time, the brake pad and the disc are basically run-in. The noise produced during this time period is sometimes not the cause of the brake pads. And if there is noise after a long period of use, it is necessary to judge the problem of the brake pads.
Thirteen. I have seen a lot of yellow brake pads. Is it true that the more copper the better?
no. Whether it is brass or copper, copper powder or copper fiber. They are all one of several fillers for brake pads, and their main function is to increase the connection strength and heat conduction. The pollution of copper to the environment is serious, so, like the United States, legislation has begun to prohibit the use of copper in brake pads. Therefore, it is wrong to judge the quality of brake pads by the amount of copper content. Furthermore, it is not certain whether the yellow surface you see is copper. There is a kind of golden yellow filler called vermiculite, which is very cheap and is often used in brake pads.
