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Home >> Chevrolet >> 1997 >> Camaro V8-350 5.7L VIN P SFI >> Repair and Diagnosis >> Brakes and Traction Control >> Hydraulic System >> Service and Repair >> Bleeding and Flushing Hydraulic System With Traction Control >> Manual Bleeding

Manual Bleeding

NOTE: In the following steps, use a suitable container and/or shop cloths to catch fluid and prevent it from contacting any painted surfaces.

1. Clean fluid reservoir cover and surrounding area.

REMOVE OR DISCONNECT
2. Fluid reservoir cover.
3. Inspect fluid level in reservoir and fill to the correct level if necessary.

INSTALL OR CONNECT
4. Fluid reservoir cover.
5. Using Tech 1, select "F6: Bleed Prep" function and follow the Tech 1 as instructed. After completion of the bleed prep function proceed with Step 6.
6. Prime ABS hydraulic modulator as follows:
a. Attach clear plastic bleeder hose to the rearward bleeder valve on the ABS hydraulic modulator. Submerge opposite hose end in a clean container partially filled with clean brake fluid.
b. Slowly open rearward bleeder valve one half to one full turn
c. Depress brake pedal and hold until fluid begins to flow.
d. Close valve and release brake pedal.
e. Repeat steps 6b and 6d until no air bubbles are present.
f. Relocate the bleeder hose on the forward ABS hydraulic modulator bleeder valve and repeat steps 6a through 6e. Once fluid is seen to flow from both ABS hydraulic modulator bleeder valves, the ABS hydraulic modulator is sufficiently full of fluid. However, it may not be completely purged of air. At this point move to the wheel brakes and bleed them. This ensures that the lowest points in the system are completely free of air and then the ABS hydraulic modulator can be purged of any remaining air.

REMOVE OR DISCONNECT
7. Fluid reservoir cover.
8. Inspect fluid level in reservoir and fill to the correct level if necessary.

INSTALL OR CONNECT
9. Fluid reservoir cover.
10. Raise vehicle and suitable support. Bleed sequence:
- right rear.
- left front.
- right front.
- left rear.
11. Bleed wheel brakes in sequence shown above.
a. Attach a clear plastic bleeder hose to the bleeder valve at each wheel and submerge opposite hose end in a clean container partially filled with clean brake fluid.
b. Open bleeder valve.
c. Slowly depress brake pedal.
d. Close valve and slowly release brake pedal.
e. Wait 5 seconds.
f. Repeat steps 11b through 11e until the brake pedal feels firm and no air bubbles are observed in the bleeder hose. To assist in freeing entrapped air, tap lightly on caliper or backing plate with a rubber mallet.
12. Repeat step 11 on left rear wheel brake.
13. Repeat step 11 on right front wheel brake.
14. Repeat step 11 on left front wheel brake.
15. Continuing with the Tech 1, press "ENTER" to initialize the TCS modulator for bleeding. Follow the Tech 1 as directed.
16. Proceed as follows to bleed the rear wheel brakes only:
a. Attach a clear plastic bleeder hose to the right rear wheel bleeder valve and submerge opposite hose end in a clean container partially filled with clean brake fluid.
b. Slowly open bleeder valve.
c. Slowly depress brake pedal.
d. Close valve when fluid begins to flow without any air bubbles. Tap lightly on the caliper or backing plate to dislodge any trapped air bubbles.
e. Relocate bleeder hose to the left rear wheel bleeder valve and repeat steps 16a through 16d. This procedure must be followed to insure all air has been removed from the TCS hydraulic modulator.

REMOVE OR DISCONNECT
17. Fluid reservoir cover.
18. Inspect fluid level in reservoir and fill to the correct level if necessary.

INSTALL OR CONNECT
19. Fluid reservoir cover.
20. Bleed the ABS hydraulic modulator.
a. Attach a clear plastic bleeder hose to the rearward bleeder valve on the ABS hydraulic modulator. Submerge opposite hose end in a clean container partially filled with clean brake fluid.
b. Depress brake pedal with moderate force.
c. Slowly open rearward bleeder valve one half to one full turn and allow fluid to flow.
d. Close valve and slowly release brake pedal.
e. Wait 5 seconds.
f. Repeat steps 20b through 20e until the no air bubbles are observed in the bleeder hose.
g. Relocate the bleeder hose on the forward ABS hydraulic modulator bleeder valve and repeat steps 20a through 20f. Tighten ABS hydraulic modulator bleeder valves to 9 Nm (80 inch lbs.).

REMOVE OR DISCONNECT
21. Fluid reservoir cover.
22. Inspect fluid level in reservoir and fill to the correct level if necessary.

INSTALL OR CONNECT
23. Fluid reservoir cover.
24. Inspect With ignition to "RUN" apply brake pedal with moderate force and hold. Note pedal travel and feel. If pedal feels firm and constant and pedal travel is not excessive, start the engine. With the engine running, recheck the pedal travel. If it's still firm and constant and pedal travel is not excessive, go to Step 25. If pedal feels soft or has excessive travel either initially or after the engine is started, the following procedure may be used. With the Tech 1, "Release" then "Apply" each ABS motor 2 to 3 times and cycle each ABS solenoid 5 to 10 times. When finished, be sure to "Apply" the front and rear motors on the ABS hydraulic modulator. "Apply" and "Release" each TCS motor 2 to 3 times. When finished be sure to "Release" each motor on the TCS hydraulic modulator. This procedure will ensure all trapped air has been removed from the ABS and TCS hydraulic modulator bores. Now repeat bleeding procedure starting at Step 1.
25. Road test the vehicle. Make several normal (non-ABS) stops from a moderate speed to ensure proper brake system function. Allow adequate cooling time between stops.



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