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This is a full guide on how to bleed the brake system from start to finish! This process requires at least 2 people, but is ideally done with 3 or 4.

Roles + Responsibilities

Roles

Responsibilities

Bleeder

(ideally has experience bleeding the system)

  • loosens and tightens bleeder screw

  • holds tube and cup

  • watches tube for any bubbles in brake fluid

  • tells driver when to press brake pedal and when to let go

Driver

  • sits in car to press and hold brake pedal according to bleeder’s instruction

Filler

  • checks level of brake fluid in master cylinder reservoirs and fills as needed

Wiggler (Optional)

  • shakes brake lines to ensure any air in the lines makes its way to calipers

Brake System Overview

Brakes make the car stop (to prevent crashing), but they are also vital for taking corners at ideal speeds.

Important Parts
Calipers + Rotors

  • The rotors are metal discs that spin with the wheels.

  • The calipers are placed over the rotor, but attached to the knuckle.

  • The pistons of the calipers press the brake pads against the rotor- the friction slows/stops the wheels from spinning.

Master Cylinder

  • The master cylinders are behind the brake pedals.

  • The pistons inside the cylinder compress the brake fluid, taking the force from your foot on the pedal and converting it to hydraulic pressure.

Brake Lines

  • The brake lines are full of fluid, which translates the hydraulic pressure from the master cylinders to each of the calipers, where it pushes the brake pads against the rotors.

  • The lines are steel braided (which are better than rubber because they keep the lines from expanding when the pedal is pressed, protecting the lines from debris, and looking prettier 😍 ) .

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