The brake disc is rusted
Is the brake disc rusty normal?
Brake disc Rust is a normal phenomenon. Slight rust on the brake disc can be “worn off” by normal braking. In order to enhance braking friction, except for a few high-end cars that use ceramic brake discs, most vehicles use cast iron brake discs. As long as it rains or the humidity is high, the brake discs will often become rusty after parking for a while. The situation is not a malfunction, but is determined by the material of the brake disc, not the quality of the brake disc. Generally speaking, this kind of rust will not affect normal braking.
What to do if the car brake disc is rusted
1. If there is only slight rust, we can use continuous braking while driving to remove the rust. Because disc brakes rely on the friction between the brake caliper and the brake pad to brake, the rust can be rubbed away under multiple braking. This method should be done on a safe road section. This is how to “polish” light rust.
2. If the rust is severe, the above method is not applicable. When braking, you will also find obvious vibrations in the brake pedal, steering wheel, etc. This situation must be dealt with specifically because of the rust. The traces are too “stubborn” and not only cannot be “polished”, but even doing it reluctantly will accelerate the wear of the brake pads. In this case, we need to find a repair shop to remove and polish the brake disc and remove the rust. Owners whose vehicles are often parked must perform maintenance on their brake discs every two months. This avoids serious corrosion of the brake disc and allows you to drive on the road at any time.
How to prevent brake discs from rusting
1. Find out the cause of brake disc rust and prevent it. In many cases, the rust of the brake disc is mainly caused by the air being too humid or being directly wet by rain. If the rust is not too serious, we can just use the car frequently and try to put it in the rain when parking. Just a place where you can’t get wet.
2. Replace the brake disc with a better quality to fundamentally prevent the brake disc from rusting. If the rust on your car is too severe, or the rust cannot be prevented at all, then simply replacing the brake disc with a better one can solve the problem.
3. Carry out anti-rust treatment. When the car itself is used for a long time, the rust will not be too serious. If it will not be used for a long time, in order to prevent the brake disc from getting too rusty, we can do some anti-rust treatment. Prevent brake disc rust. 【View details>>】
Brake disc wear and replacement
Hazards after grinding the brake disc
The brake disc specifications are strictly required by the manufacturer, but the brake disc is different from the brake pad. After being polished, the distance between the brake disc and the brake pad will change. Even if the gap between the two is small, it will have a huge impact. It is dangerous, so it is not recommended to grind the brake disc. If there is any problem, replace it directly.
How often should the brake disc be replaced?
The maximum wear limit of the brake disc is 2 mm. After use to the limit, the brake disc must be replaced with a new one. However, in actual use, most car owners do not strictly implement this standard. The replacement frequency should also be measured according to your own driving habits. The approximate measurement standards are as follows:
1. Look at the replacement frequency of the brake pads
If the replacement of the brake pads The frequency is very high, so it is recommended to check the thickness of the brake disc more often. After all, if your brake disc costs faster, it means that you use a lot of brakes, so you should check the brake disc regularly.
2. Determine based on the wear condition
Because in addition to normal wear and tear of the brake disc, there is also the quality of the brake pad or brake disc and the normal use process. For wear caused by foreign matter, if the brake disc has some deep grooves where it is worn by foreign matter, or if the disc wear is uneven (some places are thin, some are thick), it is recommended to replace it, because this kind of wear will directly cause deviations. Affect our safe driving.
To what extent should the brake disc be replaced?
1. If the brake disc has deep grooves exceeding 2 mm, or the thickness of the brake disc surface is uneven , and if cracks occur, it needs to be replaced in time.
2. Replace according to personal driving habits and the quality of the brake disc itself. For example: Generally, the brake disc replacement cycle of the main driving wheel is 60,000-80,000 kilometers, while the life of the driven wheel can reach about 100,000 kilometers.
3. As an object that wears together with the brake disc, the high degree of wear of the brake pads will inevitably lead to the high degree of wear of the brake discs. If the brake pads are replaced frequently, the wear of the brake discs needs to be checked in time. degree.
4. When braking, a sharp sound occurs, and the braking effect is poor. Even if the brake pads are replaced, it still cannot be improved. At this time, it should be that the brake disc is high due to long-term braking or frequent braking on long slopes. After deformation, the surface is burnt, the hardness becomes larger and it makes noise, the brake disc should be checked and replaced.
5. When braking, if the tire jumps, check whether the brake disc is deformed. If it is deformed, it must be replaced. 【View details>>】
How to deal with grooves in brake discs
1. If the groove is not deep
You can remove the brake pad and polish it smooth with coarse sandpaper, and then use the polished brake pad to The disc is installed on the car, and the grooves in the brake disc can be eliminated during use. You can choose softer brake pads. Although the brake pads wear faster, they will not cause grooves in the brake disc and will not cause abnormal noise during braking.
2. If the groove of the brake disc is deep
You can remove the brake disc and take it to a lathe workshop to grind out the groove, that is, to polish it. The brake disc can continue to be used after being installed on the vehicle.
3. If the groove reaches the wear limit
After inspection in the repair shop, if the groove reaches the brake disc wear limit, the brake disc needs to be replaced. .
Brake disc price
The price of brake discs varies depending on the car model, material and brand, generally in It costs about 300-500 yuan. Generally, a set of brake discs needs to be replaced. The price of a set of brake discs is generally about 600-800 yuan. When you find obvious and deep grooves on the brake disc, it needs to be replaced.
The difference between brake discs and brake pads
Brake discs are also called brake discs. As the name suggests, they are disc-shaped. The disc is made of metal and has many pores. It will rotate with the tires when the car is driving. The brake caliper clamps the brake disc and generates braking force to slow down or stop. Disc brakes provide better braking and are easier to maintain than drum brakes.
Brake pads are also called brake pads. They are made of ceramic, metal and carbon fiber. They are installed in the brake calipers. In the car’s braking system, the brake pads are the most critical safety parts. The braking effect is The quality of the brake pads is determined by the brake pads. The brake pads are generally composed of steel plates, bonded insulation layers and friction blocks. When the brakes are stepped on, they will be squeezed onto the brake disc or brake drum, causing friction to slow down the vehicle. and braking purposes.
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