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Why do brakes squeak? PDF Print E-mail

While most brake squeal is normal, it is always best to have the noise checked out by a professional. Brake squeal is the result of high-pitched vibration of the brake pads. This vibration occurs because the pads are not properly insulated from the caliper. Pads usually come equipped with anti-rattle clips, insulator shims and sometimes come with a silicone backing that literally glues the pad to the caliper to keep the pads secure and help prevent rattle or vibrations. Sometimes brake squeal is the result of the brake pads being to hard. These smooth, hard surfaces rub against each other resulting in the squeal. If this is the case, replaceing the pads and resurfacing the rotors should stop the squeal.

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