Pressure Flushing
^ TOOLS REQUIRED- J 29532 Diaphragm Type Brake Bleeder
- J 35589 Compact Brake Bleeder Adapter
CAUTION: Use only SUPREME 11 (GM PN# 12377967) DOT 3 brake fluid from a clean, sealed container. Do not use fluid from an open container that may be contaminated with water. Improper or contaminated fluid could result in damage to components, or loss of braking, with possible injury.
CAUTION: Overfilling the reservoir must be avoided due to the potential for overflow onto the nearby catalytic converters in the exhaust system. Brake fluid is flammable, and contact with hot exhaust components could result in a fire and possible personal injury.
NOTICE: Pressure Bleeding equipment can be used to perform the flush procedure. The pressure bleeding equipment used for flushing must be of the diaphragm type. It must a have a rubber diaphragm between the air supply and the brake fluid to prevent air, moisture, and other contaminants from entering the hydraulic system.
1. Clean the brake fluid reservoir cap and the surrounding area.
2. Remove the brake fluid reservoir cap.
3. Remove any remaining brake fluid in the reservoir.
4. Refill the brake fluid reservoir with clean DOT 3 brake fluid to the proper level.
5. Install the J 35589 to the brake fluid reservoir.
6. Install the J 35589 to the pressure bleeding equipment.
7. Adjust the pressure bleeding equipment to 35-70 kPa (5-10 psi) and wait for approximately 30 seconds to ensure there is no leakage.
8. Adjust the pressure bleeding equipment to 205-240 kPa (30-35 psi).
9. After connecting the pressure bleeding equipment and pressurizing the system, perform the following steps:
9.1. Attach a clear plastic hose to the rearward bleeder valve on the brake modulator. Place the other end of the hose in a container to collect draining brake fluid. Do not submerge the hose end into the fluid.
9.2. Slowly open the bleeder valve and allow the fluid to flow until clean brake fluid flows or until at least 118 ml (4 oz) of fluid accumulates.
9.3. Close the valve.
9.4. Repeat the above procedure for the forward bleeder valve until clean brake fluid flows or until at least 118 ml (4 oz) of fluid accumulates.
^ Tighten The Antilock Brake System (ABS) brake modulator bleeder valves to 9 Nm (80 inch lbs.) .
NOTICE: Refer to Fastener Notice in Cautions and Notices.
10. Raise and suitably support the vehicle.
IMPORTANT: The following is the wheel position flush sequence:
10.1. Right rear
10.2. Left rear
10.3. Right front
10.4. Left front
11. Flush the brakes using the following procedure:
11.1. Attach the bleeder hose to the bleeder valve at each wheel and place the other end into a container to collect the draining brake fluid. Do not submerge the hose end into the fluid.
11.2. Slowly open the bleeder valve and allow the fluid to flow.
11.3. Close the valve when clean brake fluid begins to flow or at least 235 ml (8 oz) of fluid accumulates.
12. Flush the right rear brake using the sequence in Step 11.
13. Flush the left front brake using the sequence in Step 11.
14. Flush the left rear brake using the sequence in Step 11.
15. Flush the right front brake using the sequence in Step 11.
^ Tighten the front caliper bleeder valves to 13 Nm (115 inch lbs.) .
^ Tighten the rear caliper bleeder valves to 7 Nm (62 inch lbs.) .
^ Tighten the rear wheel cylinder bleeder valves to 7 Nm (62 inch lbs.) .
IMPORTANT: Ensure that the bleeder valves do not leak.
16. Lower the vehicle.
17. Remove the bleeder adapter.
18. Replace all the rubber components listed in "Flushing Procedure".
19. Repeat the flushing procedure one more time.
20. Inspect the brake fluid level in the reservoir and fill it to the correct level if necessary.
21. Install the brake fluid reservoir cap.
22. Bleed the entire brake hydraulic system.