Damp brake pads rubbing against the rotors generate a squealing noise. This occurs because the water acts as a temporary lubricant. Once heat dries out the moisture, typically after a few minutes of driving, the squealing often disappears.
2. Brake pad material:
Certain types of brake pads, especially those made from semi-metallic materials or containing high amounts of friction material, may be prone to squealing, particularly when they are cold.
3. Brake pad/ rotor combination:
The specific combination of brake pads and brake rotors can also affect the likelihood of brake squeal. Some combinations simply produce more noise than others.
4. Rust on brake rotors:
If the brake rotors have accumulated a layer of rust due to infrequent use, this can also cause a temporary squealing sound until the rust is worn away.
5. Glazed rotors:
Over time, heat generated during braking can glaze the surface of the brake rotors. This can lead to a temporary reduction in friction, resulting in squealing, until the glaze wears off.
To reduce the likelihood of brake squeal, regular cleaning of the brake system, periodic checks for rust or debris buildup, and the occasional use of a brake cleaner can help address the issue. If the squealing persists, it's recommended to have your vehicle's braking system inspected by a professional mechanic.
