Brake pads come in various types, including organic, semi-metallic, and ceramic. It’s crucial to use pads that match your car’s specifications. Some pads have an audible wear indicator that chirps when worn, while others have electronic sensors that trigger a light. BMWs use a sensor that needs replacement with the pads.
Examining worn brake pads can reveal issues. Inner brake pad wear often indicates a sticking caliper, requiring lubrication of the slides. Glazing or crackling means poor friction and often requires new pads. Overheating can cause chunking or missing pieces. Fluid contamination also necessitates replacement as pads absorb fluid and release it when hot.
Overlapping friction material, where only part of the pad makes contact, is caused by an undersized rotor.
Proper brake pad break-in is essential. This involves about 20 slowdowns from 50 to 20 mph, with 30 seconds between applications to allow for cooling. This process creates an even layer of ceramic material on the rotor. Avoid panic stops and prolonged sitting at stoplights immediately after installation to allow for proper cooling.
The cause of overlapping friction material on a brake pad is an installed rotor that is too small.
Brake Pads
