What Causes Brake Noise During Cold Start?
3 Answers
The reason for brake noise during cold start is: the sound produced by friction between the brake pads and brake discs, which is related to the material of the brake pads. If the hardness is too high or there are too many impurities, they can be removed and polished to ensure a flat contact surface, restoring normal operation and reducing wear on the brake discs. Timely maintenance and inspection ensure stable, comfortable, and safe driving. Braking tips: 1. When braking, release the brake before the vehicle comes to a complete stop. Continuously pressing the brake can cause a strong impact when the vehicle stops. Release the brake once before the vehicle stops completely, then gently press the brake until the vehicle stops. 2. When braking during a turn, pressing the brake while turning the steering wheel can cause the vehicle to lose balance. Before entering a turn, reduce the speed sufficiently by braking. Emergency braking on slippery curved roads can easily cause skidding. Reduce the transmission gear and use engine braking to slow down.
I've also experienced brake noise during cold starts. Back when I was driving to work in the morning, I'd hear squeaking sounds when first applying the brakes, which was initially concerning. Actually, there are several reasons for this: brake pads with higher metal content tend to do this, creating friction noises in low temperatures. Also, after sitting overnight, a thin layer of rust forms on the brake discs, which wears off after a few brake applications and the noise disappears. Additionally, if brake pads haven't been replaced for a long time and have worn down to the warning indicator, they'll also produce unusual noises. I eventually got used to this situation - as long as the noise disappears after driving for a while when the car warms up, there's no need to worry. However, if the noise persists continuously, it should be taken seriously as it might indicate issues like poor brake caliper retraction or suspension system problems, requiring immediate inspection. Parking away from wet areas after rain can also help reduce rust formation.
Every time I hear the brake squealing after morning startup, I become particularly alert. Actually, this issue is quite common. In most cases, it's caused by slight rust formation on the brake disc surface due to humid conditions, especially for vehicles parked outdoors overnight. Additionally, the brake pad material plays a key role - those semi-metallic formula pads tend to produce sharp noises in low temperatures. I once experienced persistent squealing myself, which later turned out to be worn brake pads needing replacement. I recommend regularly checking brake pad thickness rather than waiting until the warning indicator contacts the disc. What worries me most is foreign objects like gravel getting stuck between discs and pads - those require immediate cleaning. Long-term neglect could even lead to brake shuddering or affect braking performance. Since it concerns driving safety, it's better to make an extra trip to the repair shop than to take chances.
