What are the causes of grooves on brake discs?
4 Answers
The causes of grooves on brake discs are: 1. Driving habits, often uneven distribution of braking force between front and rear; 2. Foreign objects getting stuck between the brake disc and brake pads, especially when heavy braking occurs at that moment; 3. Uneven force distribution of brake calipers; 4. Manufacturing defects in brake pads, resulting in uneven mixing of materials. The steps for replacing brake discs are: 1. Lift the vehicle and remove the tire; 2. Remove the screws of the brake caliper, open the brake caliper, and take out the old brake pads; 3. Push the brake piston back in and install the new brake pads; 4. Reinstall the brake caliper, tighten the caliper screws to the required torque, and reinstall the tire; 5. Press the brake pedal several times to eliminate the gap between the brake pads and the brake disc, allowing the brake piston to reset; 6. Check if the brake fluid pump is functioning properly.
After driving for so many years, I've encountered brake discs with grooves several times. The most common cause is uneven wear of the brake pads, possibly due to hard particles embedded in them, such as small stones or metal shavings. This is especially likely to happen after driving on muddy roads in rainy weather, as the dirt can rub against the disc surface and create grooves. Driving habits also play a role, such as frequent hard braking or keeping the brakes engaged for long periods, which can harden the materials. Once grooves appear, you may hear squeaking sounds when braking, or even experience longer stopping distances, increasing the risk of accidents. I recommend checking the brake pad thickness during every maintenance service. If they're too thin or the surface is rough, replace them immediately to avoid turning a small issue into a major repair.
I discovered that the grooves on brake discs conceal serious safety hazards, primarily caused by mismatched brake pad materials or foreign object contamination, which scratch the disc surface. Prolonged use of inferior parts or neglected maintenance exacerbates this condition, leading to uneven braking and increased risk of loss of control on wet roads. From a safety perspective, this effectively reduces the vehicle's braking efficiency and may cause rear-end collisions. I always remind myself to regularly clean wheel dust, especially after mountain driving, to prevent accumulated debris from jamming. I also check for stuck calipers or hydraulic fluid leaks to ensure the overall reliability of the braking system.
I noticed grooves on the brake discs, usually caused by brake pads being too hard or debris getting stuck and causing friction. This is a common issue with new cars after prolonged use, especially when frequently starting and braking in city traffic jams, which leads to uneven wear. Simply put, it's like a file scraping the disc surface, leaving marks; small stones or metal shavings stuck on the pads can create grooves when dragged. I found that using high-quality brake pads can prevent this—don’t skimp and choose inferior products. Pay attention to road conditions to avoid dirty areas, and regular maintenance can keep the braking system smooth.
