Squealing Brakes - How do you fix?
I had my brakes done at the dealership about 8 months ago. They have started to squeal. I called the dealership and they said that this is due to the type of pads they use. Below is a response they sent me.
This does not sound right. So my question: How do I fix the squealing? I do not want the problem to get worse or develop into something else.
SUBJECT: Brake Noise
This bulletin contains important information about brake systems on vehicles. It's designed to give you an understanding of the materials used in brake systems. It will also familiarize you with some normal noises that may occur with a properly operating system so that you can clearly communicate these details to your customers. Many brake noises are normal and require no repair action. Unusual noises (not considered normal) should be investigated and repaired using approved procedures and replacement parts as required.
Because of environmental concerns, automotive manufacturers have eliminated the use of asbestos in most of their products. As a substitute, in some applications, manufacturers adopted semi-metallic brake linings, which offer excellent performance. However, because of the metal-to-metal contact with semi-metallic pads, the noises generated by the brake system under normal operation may be greater than vehicles equipped with the previous asbestos linings.
During normal operation, various noises may be heard from the brake system, whether equipped with disc brakes or drum brakes, with or without ABS. To reduce the noise level manufacturers have begun introducing new non-asbestos organic (NAO) brake pads on several models.
COMMON BRAKE NOISES
Depending upon the local environment and individual driving habits, noises from the brake system may become apparent. The following noises are normal and are considered general characteristics of all braking systems (including other vehicle manufacturers). These noises do not indicate improper operation or malfunction in the brake system.
This noise is common with rear brake drums and on some disc brakes during the first few stops (such as after the vehicle has been parked overnight). This is primarily due to the formation of trace corrosion (light rust) on the metal surfaces during vehicle non-use or storage. This light corrosion is typically cleared from the metal surfaces after a few stops causing the noise to subside.
Trace Squeak/Squeal Noise
This typically occurs intermittently with front brake linings at medium speeds when you apply light to medium pressure on the brake pedal. It may also occasionally occur on the rear brakes during the first few stops and/or with cold brakes (especially morning) and/or high humidity.
On automatic transmission equipped vehicles, a slight groan may be heard when coming to an abrupt stop or when allowing the vehicle to creep forward slowly with the brakes slightly applied.
ABS Self Check/Clunk Noise
This noise will occur when the vehicle is first started and moved at low speed (e.g. backing or pulling forward out of a parking space). A slight pulsation at the brake pedal may also be felt during the self-test procedure If any problem is found during self-check, the ABS system will deactivate automatically and the yellow "Anti-Lock" brake warning light on the instrument panel will light up. While the ABS system is deactivated (i.e. when the warning light is on) the brake system will operate as a conventional, non-ABS system.