Corvette V8-5.7L VIN G (1997)
Brake Master Cylinder: Service and Repair
Bench Bleeding (with ABS)
NOTE: - Materials Required:
-
One 11 x 1.5 mm tube fitting nut One 12 x 1.0 mm tube fitting nut
-
Two pieces of 4.75 mm (0.187 inch) brake pipe, approximately 50 mm (1.969 inch) long
1. Fabricate two plugs in order to plug the master cylinder outlet ports. Use the following procedure:
a. Fashion two ISO flares on one end of each tube. Refer to ISO Flares Replacement.
b. Install the nuts onto the flared tubes.
c. One at a time, place approximately 13 mm (0.51 inch) of the unflared tube end in a vise.
d. Compress the end of the tube with the vise in order to collapse the tube.
e. Bend the tube to a 90 degree angle.
f.
Remove the tube from the vise.
g. Put the tube back in the vise. Fold the tube end against itself in order to form an air-tight seal.
2. Plug the master cylinder outlet ports with the fabricated plugs.
CAUTION: Do not overtighten vise, or damage to the master cylinder will result.
3. Place shop towels around the master cylinder in order to absorb the bled fluid.
4. Mount the master cylinder in a vise. Tilt the front end of the master cylinder down slightly.
5. Fill the master cylinder with clean brake fluid.
NOTE: As air bleeds from the brake master cylinder, resistance to primary piston strokes will increase, not allowing a full 25 mm (0.984 inch)
stroke.
6. Using a tool with a smooth, rounded end, stroke the primary piston about 25 mm (0.948 inch) several times.
7. Reposition the master cylinder in the vise. Tilt the master cylinder slightly up.
8. Stroke the primary piston about 25 mm (0.984 in) several times.
9. Reposition the brake master cylinder in the vise. Level the master cylinder.
10. Loosen the fabricated plugs one at a time.
11. Push the primary piston into the master cylinder bore in order to force the air out of the master cylinder.
NOTE: In order to prevent air from sucking back into the master cylinder, tighten the fabricated plugs before allowing the primary piston to
return to its original position.
12. Repeat the previous 6 steps until no air escapes past the plugs.
13. Install the master cylinder into the vehicle.