911 Turbo AWD (996) F6-3.6L Turbo (2001)
Brake Bleeding: Service and Repair
Overview
Bleeding brakes (vehicle with PSM)
PSM (Porsche Stability Management) is standard in the 911 Turbo (996).
Note:
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Observe brake-fluid quality. Use only new DOT 4 brake fluid.
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The brake-fluid change interval using Super DOT 4 brake fluid is two years.
Procedure for bleeding
1. Bleed brakes as usual.
2. Then bleed at front on right with running booster pump.
1st Step: Bleed Brakes As Usual
Caution:
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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.
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Double the number of pumping cycles and use only half of the master brake cylinder stroke.
1. Fill reservoir to its top edge with new brake fluid.
2. Connect a bleeding device to the brake fluid reservoir. Switch on the bleeding device. Bleeding pressure approximately 2.0 bar.
Note: Bleed the outer bleeder valve first.
3. Continue bleeding at the brake calipers in the sequence: Sequence: Rear right / rear left / front left / front right.
4. Open each bleeder valve until clear, bubble-free brake fluid emerges.
5. 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 and/or a new hydraulic unit, do the following while bleeding:
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Open the right rear bleeder valves, then fully depress the brake pedal several times.
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Hold for 2 - 3 seconds after each depression, then release slowly.
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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.
6. Continue bleeding at front on right with running booster pump (Step 2).
2nd Step: Bleeding At Front On Right With Running Booster Pump
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.
Note:
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Bleed brakes as usual
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Do not carry out booster pump activation with the Porsche System Tester 2 until after this has been done (after conventional bleeding) as
otherwise damage to the booster pump can occur.