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Home >> Porsche >> 2014 >> Boxster Base, Standard Trans >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> 47 - Brakes - Hydraulic Brake System, Regulator -- (981) BOXSTER/CAYMAN >> WM 470855 Replacing Brake Fluid (All Models) >> Replacing Brake Fluid >> Changing Brake Fluid

Changing Brake Fluid

  1. Place cover in service position.

    Unclip the cover at the left and right, lift it up and engage the yellow support in the luggage compartment lid -1-  .

    Fig 1: Placing Cover In Service Position
    G10026662Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  2. Open the cap on the reservoir.

    Connect a bleeding device to the brake fluid reservoir.

    Switch on the bleeding device. Pressure when changing brake fluid is approx. 2.0 bar (29 psi).

    Fig 2: Connecting Bleeding Device To Reservoir
    G10026663Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Information 

    • Observe brake fluid quality. Use only new DOT 4 brake fluid  .
    • This brake fluid is available under the following part numbers: Quantity supplied: 1 litre = 000.043.203.66; 30 litres = 000.043.203.67  .
    • There are two bleeder valves on the brake calliper. Brake fluid must be drained at both bleeder valves  .
  3. Continue to change the brake fluid at the brake callipers (no prescribed sequence).

    Use a transparent hose and a collecting bottle to check the escaping brake fluid for cleanliness, absence of air bubbles and to determine the amount of brake fluid used.

    Drain brake fluid at both bleeder valves on each brake calliper.

    Per brake calliper: → Change brake fluid (on each wheel): approx. 250 cm 3 

  4. Tighten bleeder valves to the stipulated tightening torque and remove bleeder hoses. Tightening torque 14 Nm (10.5 ft. lbs.) 
  5. Switch off the bleeding device and remove the adapter at the reservoir.

    Visually check the brake fluid level.

    The brake fluid level must be between the MIN and MAX markings.

    Correct the brake fluid level if necessary.

    Fig 3: Identifying Min/Max Markings For Brake Fluid
    G10026664Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  6. Fit cover over the brake fluid reservoir (move out of service position).