>>Pad composition: Some brake pads are made of materials more prone to vibration than others, and some produce high pitched squeal because of the presence of metal particles in their compound which scrape against the rotor.
>>Glazed pads: When breaks over heat, a film of material can formed on the surface of the brake pads or rotors, reducing friction and causing squealing because they have lost some of their 'bite'.
>>Warped rotor or drums: If the rotor or drum is warped or uneven, they can cause brake pads or shoe to vibrate as the vehicle moves.
>>Faulty caliper or wheel bearing: A worn-out caliper or wheel bearing can allow excessive movement in the brake assembly, which can cause squealing.
>>Lack of lubrication: If the brake caliper, guides or pins are not properly lubricated, they can vibrate and produce squealing sound when the brakes are applied.
When a car screech, it's important to address the issue promptly. A brake squeal is usually a sign that something is wrong with your brakes, and ignoring them could lead to more expensive repairs down the road.
