Step 1 : Bleed Brakes As Usual
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2004 Porsche Boxster, 2003 Porsche Boxster, 2002 Porsche Boxster, 2001 Porsche Boxster, and 2000 Porsche Boxster. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
For vehicles with extremely high mileage or for very old vehicles, damage to the brake master cylinder can occur and the primary boots can be damaged! Double the number of pumping cycles and use only half of the master brake cylinder stroke!
- Fill reservoir to its top edge with new brake fluid.
- Connect a bleeding device to the expansion tank. Switch on the bleeding device. Bleeding pressure approximately 2.0 bar.
NOTE: Bleed the outer bleeder valve first!
- Continue bleeding at the brake calipers in the sequence: Rear right/rear left/front left/front right.
- Open each bleeder valve until clear, bubble-free brake fluid emerges.
- Use a transparent hose and a collecting bottle to check the escaping brake fluid accurately for cleanliness, lack of air bubbles and to determine the brake fluid used.
After installing a new brake master cylinder or a new hydraulic unit, observe the following while bleeding:
- Open the right rear bleeder valves, then fully depress the brake pedal several times.
- Hold for 2 - 3 seconds after each depression, then release slowly.
- Repeat this procedure in the sequence rear left/front right/front left. This will remove all air bubbles (from the primary circuit).
NOTE: Also carry out this procedure if the brake hydraulics was largely empty or if after bleeding residual air can be detected by excessive brake-pedal travel! - Continue bleeding at front on right with running booster pump (Step 2).