Delco ABS-VI brake questions....

ss wannabee · 04-10-2013, 01:14 AM

Changing a master cyl on a '98 Lumina sedan...Couldn't borrow a scan tool...

To simplify bleeding, BPMV modulator valves should be in "home" position...

Factory manual on one page says ..to turn modulator gears COUNTER-CLOCKWISE
to achieve "home" position....

On another page...it says to turn gears CLOCKWISE....

One is a mis-print or....?

Going to bleed manually....understand start with forward bleeder valve on BPMV...then do I do the rear valve on BPMV...or leave it alone now? Maybe later?

Next I think you do RF wheel...then LF...and then drive car 5 mph...or a little more?

Finish up with RR...and then LR wheel? Do I have that right?

Don't think traditional RR-LR-RF-LF sequence applies here?

Boy, do I miss the one-lung m/c days!

04-10-2013, 01:14 AM	#1
ss wannabee Senior Member Join Date: Jun 2005 Posts: 663 Likes: 0 Liked 7 Times in 7 Posts	Delco ABS-VI brake questions.... Changing a master cyl on a '98 Lumina sedan...Couldn't borrow a scan tool... To simplify bleeding, BPMV modulator valves should be in "home" position... Factory manual on one page says ..to turn modulator gears COUNTER-CLOCKWISE to achieve "home" position.... On another page...it says to turn gears CLOCKWISE.... One is a mis-print or....? Going to bleed manually....understand start with forward bleeder valve on BPMV...then do I do the rear valve on BPMV...or leave it alone now? Maybe later? Next I think you do RF wheel...then LF...and then drive car 5 mph...or a little more? Finish up with RR...and then LR wheel? Do I have that right? Don't think traditional RR-LR-RF-LF sequence applies here? Boy, do I miss the one-lung m/c days!