1. Incorrectly Installed Brake Pads: If the brake pads were not properly seated or aligned during installation, they may be rubbing against the brake rotor, causing a grinding noise.
2. Sticking Caliper Piston: A malfunctioning or stuck caliper piston can prevent the brake pads from retracting fully, causing the pads to continuously rub against the rotor and produce a grinding sound.
3. Damaged Brake Rotor: The brake rotor could have been damaged during the installation process or may have been already worn out before replacing the brake pads. A damaged or warped brake rotor can create a grinding noise as the brake pads come in contact with its uneven surface.
4. Caliper Installation Issues: If the caliper was not properly aligned or torqued to specifications, it can put additional pressure on the brake pads, leading to a grinding noise.
5. Brake Pad Material: Some high-performance or semi-metallic brake pads may produce a slight grinding noise during the bedding-in process. This noise should gradually reduce as the brake pads wear in.
To resolve this issue, it is recommended to inspect the brake components and identify the source of the noise. If the problem persists, it is advisable to have a professional mechanic diagnose the issue and perform any necessary repairs or adjustments.