What Causes a Scraping Sound When Braking to the Full Extent?
4 Answers
The reason for a scraping sound when braking to the full extent is: prolonged parking of the vehicle causing rust between the brake pads and brake discs, leading to locking. Braking, also known as deceleration, refers to the action of stopping or reducing the speed of moving locomotives, vehicles, other transportation tools, or machinery. The components of the braking system include: brake pedal, booster, master cylinder, ABS assistance, oil pipes, brake wheel cylinders, and friction components. Brake maintenance requires the following items: 1. High-temperature protection for brake pads; 2. Lubrication maintenance for brake wheel cylinders; 3. Cleaning of brake discs; 4. Replacement of brake fluid; 5. Anti-rust lubrication for tire screws, brake discs, and the contact surface with the wheel rims.
I've been driving for several years and have also encountered the issue of a scraping sound when pressing the brake pedal all the way down. That one time, it was particularly noticeable during a sharp turn on a mountain road—the sound was so harsh, like metal grinding against the ground. After inspection, I found out it was because the brake pads were severely worn down, and the metal backing plate was directly scraping against the brake disc, indicating the pads had reached their limit. If you drive more aggressively, the brake pads will wear out even faster. Don’t underestimate this sound—it can accelerate damage to the disc, and you might end up needing major repairs. I recommend checking the braking system every 10,000 kilometers, especially for older cars. Don’t wait until a big problem arises—it’s both cost-effective and safer. Also, if the braking noise gets louder on rainy days, it’s definitely a sign of more severe wear, and you should get it fixed immediately. Otherwise, the increased braking distance could easily lead to an accident.
As someone who frequently concerns about car safety, I must say this scraping sound is definitely a warning sign. It's usually caused by worn-out brake pads, or deep grooves/rust spots on the brake disc surface leading to metal-on-metal contact. Sometimes it's sand or small stones getting into the braking system and stuck between components. What seems minor could be dangerous - it might fail during emergency braking, especially worse in rain or snow. My personal lesson: don't delay, pull over immediately to inspect or contact a repair shop. Avoid heavy braking during normal driving as it accelerates component wear. Inspection is simple: identify which side has issues by locating the sound source (front wheels are more common). Safety first - spending money on proper repairs ensures peace of mind.
In the automotive field, the scraping sound when the brake is fully depressed mostly stems from component wear or issues. The most common cause is worn-out brake pads, where the metal backing plate contacts the disc, producing a grinding noise. It could also be due to uneven or scratched brake rotors. Foreign objects like small stones stuck between the brake components can also trigger such sounds. It's advisable to first stop the car and use a flashlight to briefly inspect the condition of the pads and rotors—if you notice exposed metal plates or deep grooves, replacement parts are necessary. Avoid driving for too long, as it could lead to more expensive repairs. For maintenance, regular inspections are crucial.
