What's the reason for abnormal noise in the front brakes?
3 Answers
Brake discs may produce abnormal noise due to rust or hard spots, which usually occurs when the vehicle first starts moving and improves after a few brake applications. Below is relevant information: Overview: 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 general principle of braking is to fix a wheel or disc on the high-speed shaft of the machine and install corresponding brake shoes, bands, or discs on the machine base, which generate braking torque under external force. Brake pads: Automotive brake pads, also known as brake linings, refer to the friction materials fixed on the brake drums or discs that rotate with the wheels. The friction linings and blocks within them withstand external pressure to generate friction, thereby achieving vehicle deceleration.
After years of driving, I often encounter front brake squealing, mostly caused by the warning tab on nearly worn-out brake pads rubbing against the rotor, producing a squeaking sound as a reminder to replace them. Another common reason is dirt or small stones stuck on the brake rotor, which can be resolved by cleaning. Additionally, newly replaced pads and rotors may squeal initially due to insufficient bedding-in or rust from rain. I've tried measuring pad thickness with calipers to check if they meet standards; otherwise, I send them for repair to avoid damaging the rotor and incurring higher costs. Cold weather also makes pad materials harder and more prone to noise—switching to higher-quality ceramic pads can help but at a higher cost. It's advisable to check wear levels promptly to prevent further damage.
Front brake noise should not be taken lightly. I've analyzed it from a safety perspective. It could be caused by scratches or unevenness on the brake discs causing friction noise, or the brake pads containing metal materials that are prone to noise in low temperatures. The most dangerous scenario is loose installation where the caliper isn't secure - if the brakes fail, it's extremely hazardous. My advice is to immediately pull over and check for looseness or severe wear - don't risk continuing to drive. Another possibility is moisture causing rust on the disc surface, which may produce noise during the first few brake applications until worn off. However, the key is to promptly send the vehicle to a professional shop for inspection to avoid sudden accidents on the road. When it comes to driving safety, no issue is too small to ignore.
