Coroner81
Newbie
I made a topic here: https://www.gmt400.com/threads/brakes-wont-bleed.42654/ and cannot delete, or edit it. Apologies for the double post. I thought I had it figured out, but obviously didn't.
I'm sorry in advance for the long post. I tried to cover everything possible.
I can't get my brakes to bleed. I constantly have an almost nonexistent pedal.
1995 Tahoe K1500 4 wheel ABS
I blew the line running to the rear last year. Replaced it, and couldn't get the brakes the bleed. After some reading about the ABS bleeding issues, and not wanting to get screwed at the dealer, (and was unable to safely drive to cycle the ABS) I opted to remove it. It was replaced by a disc/drum proportioning/combination valve.
In doing so, all the lines were replaced last year. Still couldn't get a proper pedal. Blahblahblah
In short, between last year and this year I have replaced the following:
Master. I'm currently on my 3rd. 2 last year, another this year. Bench bled every time until the piston movement didn't exceed 1/8".
Brake booster (to satisfy my fiancés suggestion- I didn't have a hard pedal at all)
All 3 high pressure lines were done last year.
Both wheel cylinders this year.
2 proportioning/combination valves- one last year, and one this year.
Calipers were done 10ish years ago. I tested them Monday with a block of wood, and work fine.
Hard lines on the axle were just done yesterday. I've been using a full size vacuum bleeder (EWK tools), as well as the 2 man BS push and hold, open/close bleeder, release pedal.
I have bled from RR to LF, and have bled LF to RR.
I made fittings with short lines to vacuum bleed the brakes at almost every connection. I bled both ports at the master. Bled all 3 ports from the proportioning valve. Bled the rear right on both sides of the high pressure line where it splits to each axle.
Nothing. Works.
I'm constantly seeing air coming from the rears. I get tiny bubbles up front, and I'm guessing those are air being pulled through the threads of the bleeder. I completely blocked off the rear brakes, and just ran with the fronts, and the brakes are decent.
At the rear I'm seeing huge bubbles. I close the bleeder, let the vacuum build a bit, then crack open the bleeder, and I'm seeing streams of large bubbles. This doesn't stop, no matter how much I bleed. No BS, I have probably run 10-20 quarts through each wheel, (filtering and reusing the old stuff which was purchased this year), since I can't afford to keep buying new bottles. I plan to flush after I have a proper pedal).
I'm losing my MF mind. Any suggestions, dynamite suppliers, locations of high cliffs, etc.. are appreciated.
I'm sorry in advance for the long post. I tried to cover everything possible.
I can't get my brakes to bleed. I constantly have an almost nonexistent pedal.
1995 Tahoe K1500 4 wheel ABS
I blew the line running to the rear last year. Replaced it, and couldn't get the brakes the bleed. After some reading about the ABS bleeding issues, and not wanting to get screwed at the dealer, (and was unable to safely drive to cycle the ABS) I opted to remove it. It was replaced by a disc/drum proportioning/combination valve.
In doing so, all the lines were replaced last year. Still couldn't get a proper pedal. Blahblahblah
In short, between last year and this year I have replaced the following:
Master. I'm currently on my 3rd. 2 last year, another this year. Bench bled every time until the piston movement didn't exceed 1/8".
Brake booster (to satisfy my fiancés suggestion- I didn't have a hard pedal at all)
All 3 high pressure lines were done last year.
Both wheel cylinders this year.
2 proportioning/combination valves- one last year, and one this year.
Calipers were done 10ish years ago. I tested them Monday with a block of wood, and work fine.
Hard lines on the axle were just done yesterday. I've been using a full size vacuum bleeder (EWK tools), as well as the 2 man BS push and hold, open/close bleeder, release pedal.
I have bled from RR to LF, and have bled LF to RR.
I made fittings with short lines to vacuum bleed the brakes at almost every connection. I bled both ports at the master. Bled all 3 ports from the proportioning valve. Bled the rear right on both sides of the high pressure line where it splits to each axle.
Nothing. Works.
I'm constantly seeing air coming from the rears. I get tiny bubbles up front, and I'm guessing those are air being pulled through the threads of the bleeder. I completely blocked off the rear brakes, and just ran with the fronts, and the brakes are decent.
At the rear I'm seeing huge bubbles. I close the bleeder, let the vacuum build a bit, then crack open the bleeder, and I'm seeing streams of large bubbles. This doesn't stop, no matter how much I bleed. No BS, I have probably run 10-20 quarts through each wheel, (filtering and reusing the old stuff which was purchased this year), since I can't afford to keep buying new bottles. I plan to flush after I have a proper pedal).
I'm losing my MF mind. Any suggestions, dynamite suppliers, locations of high cliffs, etc.. are appreciated.