8 3/4 with Disc's won't bled
#2923202
05/16/21 05:48 PM
05/16/21 05:48 PM
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Joined: Jan 2003
Posts: 665 Northwest Chicago Suburb
DaDart
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mopar
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mopar
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Northwest Chicago Suburb
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I put a 8 3/4 in my 67 dart and added after market disc kit. Could not get brakes bled. Tried several time pedal went to the floor. Replaced master, bench bled, bled and pedal still goes to flood. Manually and power bled and same issue. Added a proportioning valve to back, bled and same issue. just added a Tee to front bake line and removed distribution block. Bled and same issue. Replaced both rear calipers, bled and same problem. Went through a least a gallon of brake fluid already. I know there is air somewhere but can't find it. Any ideas???? Thanks
3 Darts and a Ram
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Re: 8 3/4 with Disc's won't bled
[Re: DaDart]
#2923209
05/16/21 06:03 PM
05/16/21 06:03 PM
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Joined: Jan 2003
Posts: 25,902 Rio Linda, CA
John_Kunkel
Too Many Posts
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Rio Linda, CA
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I put a 8 3/4 in my 67 dart and added after market disc kit. Could not get brakes bled. Tried several time pedal went to the floor. MC too small...calipers need more fluid volume than the MC can supply?
The INTERNET, the MISinformation superhighway
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Re: 8 3/4 with Disc's won't bled
[Re: DaDart]
#2923240
05/16/21 08:11 PM
05/16/21 08:11 PM
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Joined: Jan 2003
Posts: 8,016 Polson, MT
DoctorDiff
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master
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Polson, MT
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I'm guessing you are trying to bleed GM metric calipers with a parking brake. If so, did you ratchet the parking brake mechanism fist, then unbolt the caliper and reposition it so the bleeder valve is parallel to the ground? https://www.youtube.com/watch?v=q4_17Gg7tdg
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Re: 8 3/4 with Disc's won't bled
[Re: Moparteacher]
#2923381
05/17/21 08:44 AM
05/17/21 08:44 AM
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Joined: Jan 2003
Posts: 665 Northwest Chicago Suburb
DaDart
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Thanks to everyone but I believe Cass has it. I never adjusted the parking brake and viewing youtube I will have to adjust this. I will update as soon as I get back in the garage.
Just some info this kit does have the metric calipers, bleeder is on top and original Master was working with original break set-up.
3 Darts and a Ram
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Re: 8 3/4 with Disc's won't bled
[Re: Andrewh]
#2923428
05/17/21 11:11 AM
05/17/21 11:11 AM
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Joined: Jan 2003
Posts: 665 Northwest Chicago Suburb
DaDart
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Yep I already took the caliper off and bleed. The only thing I have not done is adjust the parking break.
Last edited by DaDart; 05/17/21 11:12 AM.
3 Darts and a Ram
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Re: 8 3/4 with Disc's won't bled
[Re: Andrewh]
#2923495
05/17/21 01:20 PM
05/17/21 01:20 PM
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Joined: Jan 2003
Posts: 665 Northwest Chicago Suburb
DaDart
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Thank to all. Videos really helped. Last video was helpful getting piston clocked. I have BRAKES.
Last edited by DaDart; 05/17/21 01:22 PM.
3 Darts and a Ram
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Re: 8 3/4 with Disc's won't bled
[Re: moparmarks]
#2923928
05/18/21 11:37 AM
05/18/21 11:37 AM
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Joined: Mar 2007
Posts: 3,141 tennessee,usa
mattsmopars
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master
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tennessee,usa
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So I have this GM rear kit on my 66 coronet, I have bleed the brakes a couple different ways, with a pressure bleeder from the top and with a hand held vacuum bleeder at the bottom. I get fluid from the rear, but not near as much as the fronts. I have also felt like the pedal is softer than it should be for manual brakes. So does the procedure of adjusting the parking brake change how well the rear calipers work? Do you think it would be beneficially to adjust the parking brakes, and set the calipers upright and try to re-bleed them? A little more information while I am thinking about it, when I installed the brake kit, it seemed like my rear brakes were not holding properly, the fronts would not move when the pedal was down , but the rear would with a pry bar. I had to adjust the proportioning valve wide open to get the rear brakes to seem like they would hold to the point where they needed to be, so maybe this is some of my issue, or reason i had to do that? I do know my parking brake seem to work as I have tried it in the shop, but I have not been able to make a road voyage yet. Don't want to hijacks the thread but since it is the topic any help would be great. Matt
Last edited by mattsmopars; 05/18/21 11:43 AM. Reason: added information
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Re: 8 3/4 with Disc's won't bled
[Re: mattsmopars]
#2923942
05/18/21 12:05 PM
05/18/21 12:05 PM
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Joined: Sep 2003
Posts: 19,521 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
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north of coder
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as far as i can tell, all rear calipers that have emergency brake cables attached, need the pistons "ratcheted" out to properly bleed the calipers and work as they are supposed to. failing to do this results in a spongy, low pedal, or non working rear calipers. the GM [buick, cadillac] and ford [tarus among others] are infamous for this.
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