G 20 Van V6-262 4.3L VIN Z (1993)
1.
Begin by opening the internal bleed screws 1/4 to 1/2 turn, on each side of the BPMV (figure 2).
2.
Attach the valve pressure bleeding tool J39177 to the left and right high pressure accumulator bleed valve stems of the BPMV (figure 3). Tighten
tool J39177 only finger tight.
NOTE:
It is not necessary to attach bleeding tool J39177 to the combination valve when using the manual bleed procedure.
3.
Bleed each wheel in the following sequence:
- Right rear
- Left rear
- Right front
- Left front
NOTE:
Rear wheel bleeder valves are 5/16 in. (8 mm) and front wheel bleeder valves are 10 mm.
NOTE:
A clear plastic hose can be attached to the bleeder valve and immersed into a container partially filled with clean brake fluid.
4.
Slowly apply the brake pedal one time and hold.
5.
Loosen the bleeder valve to purge the air from the wheel cylinder/caliper.
6.
Tighten the bleeder valve and slowly release the pedal.
7.
Wait 15 seconds.
8.
Be sure to check the master cylinder fluid level after 4-5 strokes to avoid running dry.
9.
Repeat steps 4 through 8, until all air is purged from the wheel cylinder/caliper.
NOTE:
It may be necessary to repeat this sequence as many as 15 to 20 times per wheel.
10.
Fill the master cylinder to the proper level and replace lid.
11.
CLOSE and tighten the two BPMV internal bleed screws (Figure 2) to 7 N-m (60 lbs.in.).
12.
Remove the valve pressure bleeding tools J39177 from the BPMV high pressure accumulator bleed valve stems and the combination valve.
13.
With the ignition switch "ON" and the engine off, bleed the pump and pressure (lower) portion of the BPMV by performing six ABS function tests
with the Tech-1.
IMPORTANT:
DURING THE TECH-1 FUNCTION TESTS, THE BRAKE PEDAL MUST BE FIRMLY DEPRESSED. THIS WILL PUSH ANY AIR FROM
THE CONTROL AREA OF THE BPMV INTO THE BRAKE SYSTEM.
14.
Finally, rebleed the four wheel cylinder/calipers again, to purge any remaining air put into the system during the function tests. Use either the
pressure bleed or manual bleed for this step.
IMPORTANT:
DO NOT OPEN THE BPMV INTERNAL BLEED SCREWS OR DEPRESS THE HIGH PRESSURE ACCUMULATOR BLEED VALVES
WHEN REBLEEDING AFTER THE FUNCTION TESTS.
15.
Tighten all four wheel cylinder/caliper bleeder valves to 7 N-m (60 lbs.in.).
16.
Fill the master cylinder to the proper level with brake fluid.
17.
Apply firm pressure to the brake pedal and evaluate the brake pedal feel.
IMPORTANT:
MAKE SURE YOU HAVE A GOOD, HARD BRAKE PEDAL BEFORE ATTEMPTING TO MOVE THE VEHICLE.
18.
Repeat the entire brake bleed procedure if necessary.
Warranty Information
LABOR OP.
MODEL
H0700
S/T
H0700
M/L
H0700
C/K
H0700
G
Use applicable labor time guide for labor hours.
