What are Caliper Pistons?
Brake calipers are an essential component of your overall brake system, and the piston is the key component of the brake caliper. Pistons are responsible for forcing the brake pads to make contact with the brake rotor to bring your vehicle to a stop.
How do Caliper Pistons Work?
A brake caliper operates using 1, 2, 4, or 6 pistons. Single piston designs allow the caliper to center during application so that the brake pads have equally applied force. Single piston designs allow the caliper to center during application so that the brake pads have equally applied force. Dual, 4 or 6-piston calipers apply hydraulic force from both sides of the caliper. Once the brake pedal is pressed, it forces the brake fluid to flow through o the caliper. The piston(s) then move outward and make contact with the brake pads which then stops your vehicle by creating friction between the brake pads and rotor.
How Is a Caliper Piston Made?
Molded using steel or phenolic material, it is cylindrical in shape, one end open, one closed.
Why do Caliper Pistons Fail?
- Rust and corrosion
- Old or contaminated brake fluid
- Worn out piston seals
What are Symptoms of Caliper Pistons Failure?
- One of the brake pads is more worn down than the other
- Your vehicle may pull to one side when steering
What are the Consequences of Caliper Pistons Failure?
- A seized piston will interfere with the effectiveness of your brakes, causing a major safety concern