Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Brake Systems - Floating Caliper Discs: Description
Floating caliper disc brake assembly uses a single piston caliper mounted to an anchor plate which is bolted to the steering knuckle. Caliper assembly floats, through four rubber bushings, on two steel guide pins threaded into anchor plate. When brake pedal is depressed, hydraulic pressure is passed to caliper pistons. This force is transmitted to inboard brake pad and against braking surface. Pressure then moves caliper housing inward on caliper guide pins, thus forcing outer disc pad against outer braking surface. When brakes are released, pressure is removed from cylinder bores and rotor runout moves pistons back into cylinders to maintain sufficient rotor-to-pad clearance.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.