Is there a relationship between brake disc noise and brake pads?

       Brake disc abnormal noise is one of the common problems in the use of automobiles, which not only affects the driving experience but may also indicate safety hazards in the braking system. The abnormal noise of brake discs is closely related to brake pads. The following is a detailed analysis and suggestions.
       1、 Reasons for brake disc abnormal noise
       1. Brake pad wear
       Brake pad wear is one of the common causes of abnormal noise in brake discs. When the brake pads wear to a certain extent, the alarm iron pin on them will rub against the brake disc, producing a sharp metal friction sound. This is a self reminder mechanism of the braking system, reminding the car owner to replace the brake pads. In addition, uneven wear of brake pads can also lead to poor contact with the brake disc, resulting in abnormal noise.
       2. Uneven surface of brake disc
       The brake disc may experience uneven wear or deformation after long-term use, leading to uneven contact between the brake pads and the brake disc, resulting in abnormal noise. For example, grooves, cracks, or uneven steps on the surface of the brake disc can affect the braking effect and generate noise.
       3. Foreign objects enter the brake system
       During the driving process, foreign objects such as sand and small stones may enter between the brake disc and brake pads, causing friction noise during braking. These foreign objects not only cause abnormal noise, but may also accelerate the wear of brake discs and brake pads.
       4. Brake caliper issue
       Wear of the brake caliper movable pin or detachment of the spring plate may cause prolonged contact between the brake pads and brake discs, resulting in abnormal noise. In addition, poor return of brake calipers can also lead to increased friction between brake pads and brake discs, resulting in noise.
       5. Brake pad installation issues
       Improper installation of brake pads, such as tight or reversed assembly with calipers, can also cause abnormal noise. Incorrect alignment or failure to tighten the fixing screws during installation may cause the brake pads to loosen and produce abnormal sounds during braking.
       6. Material issue of brake pads
       There may be metal particles with higher hardness inside the brake pads, which can produce sharp noises when rubbed against the brake disc. In addition, low-quality brake pads may have poor contact with the brake disc due to uneven material or low processing accuracy, resulting in noise.

       2、 Solution method
       1. Check and replace brake pads
       If the brake pads are excessively worn, they should be replaced with new ones in a timely manner. Meanwhile, it is recommended to choose high-quality brake pads to reduce the occurrence of abnormal noise. High quality brake pads are not only wear-resistant, but also provide more stable braking performance.
       2. Clean the surface of the brake disc
       Check if there are any foreign objects on the surface of the brake disc. If so, use compressed air or a clean cloth to clean it out. For brake discs with uneven surfaces or severe wear, disc treatment or replacement with new brake discs can be performed.
       3. Check and repair the brake caliper
       Check the brake caliper, and if there is wear on the movable pin or detachment of the spring plate, replace the relevant components in a timely manner. Ensure that the moving parts of the brake caliper are flexible and return normally.
       4. Reinstall the brake pads
       If the brake pads are not installed properly, they should be reinstalled and ensure that they fit correctly with the calipers. During installation, use appropriate tools and methods to ensure that the brake pads are securely fixed.
       5. Choose the appropriate brake pads
       Choose brake pads that match the vehicle to avoid abnormal noise caused by material issues. High quality brake pads are usually subjected to strict quality control, which can provide better braking effect and lower noise.
       3、 Daily maintenance suggestions
       1. Regularly check the brake system
       Develop the habit of regularly checking the brake system by observing the stroke of the brake pedal and feeling whether the braking force is normal to determine if there is a problem with the brake system. It is recommended to check the wear of brake discs and brake pads every 10000 kilometers of driving.
       2. Maintain good driving habits
       Try to avoid frequent sudden braking and reduce the wear and tear of the braking system. Keep driving at a constant speed and avoid frequent gear changes to reduce the burden on the braking system.
       3. Choose brake components with reliable quality
       High quality brake pads and discs can effectively reduce the occurrence of abnormal noise and improve driving safety. It is recommended to choose products from the original factory or well-known brands.
       4. Avoid driving through water
       When driving through water, the brake disc is susceptible to water accumulation and impurities, leading to a decrease in braking performance. Try to avoid driving in water or check the brake discs promptly after wading.
       5. Timely replace brake oil
       Brake oil has water absorption properties. It is recommended to replace the brake oil every 2-3 years to ensure the normal operation of the brake system.
       The abnormal noise of brake discs is closely related to brake pads. Brake pad wear, uneven surface of brake discs, foreign objects entering the brake system, brake caliper problems, and improper installation of brake pads can all lead to abnormal noise. By inspecting and replacing brake pads, cleaning the surface of brake discs, inspecting and repairing brake calipers, reinstalling brake pads, and selecting suitable brake pads, the problem of abnormal brake disc noise can be effectively solved. Regular inspection and maintenance of the brake system, maintaining good driving habits, and selecting reliable brake components are important measures to ensure the normal operation of the brake system and driving safety.