You know something's wrong with your brakes. Maybe it's a grinding or scraping noise, pulling to one side when you slow down, or even a spongy brake pedal. The first step in diagnosing the source of the problem is understanding the main parts of a brake system and how they work together.
Brake pads and shims
When you push on your brake, calipers clamp the brake pads onto the rotors to reduce speed and then stop the vehicle. Brake pads get the glory as the main component in stopping, but equally important are the rotors. Helping to reduce noise and vibration are the brake pad shims and other hardware. Shims are made of metal or rubber and found on the back of brake pads, in between the pads and the calipers. In addition to reducing noise and vibration, shims manufactured from titanium also protect calipers and fluids from damage caused by excessive heat.
Troubleshooting brake pads
To do their job effectively, the pads must be able to absorb enough energy and heat. When there is too much wear or heat, brake pad efficiency is reduced, along with your stopping power. Car brake pad indicators are designed to emit a scraping sound when the pads are worn out. If you hear this or a grinding sound when you apply your brakes, the pads need replacing. Brake pads should be replaced in pairs. Learn how to choose the right brake pads for your vehicle and how to replace brake pads yourself.