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Re: Bleeding Brakes on a body
[Re: fastfish451]
#2276180
03/25/17 09:39 PM
03/25/17 09:39 PM
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Joined: May 2003
Posts: 96,666 On The Boat, On The Lake, Wa. ...
amxautox
Still Retired. Still Posting on Moparts. A Lot.
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Still Retired. Still Posting on Moparts. A Lot.
Joined: May 2003
Posts: 96,666
On The Boat, On The Lake, Wa. ...
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While bleeding, or after you're done?
Tom
"Everyone should believe in something; I believe I'll go fishing."
-Henry David Thoreau
Men and fish are alike. They both get into trouble when they open their mouths
author unknown
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Re: Bleeding Brakes on a body
[Re: fastfish451]
#2276185
03/25/17 09:51 PM
03/25/17 09:51 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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first I would put a block of wood under the pedal to limit its travel to the normal range (not a dealbreaker but it keeps the cups in their normal worn range of travel in the bore). not sure why the rear bleeding wont go down, I would try it on both of the rear bleeders (which you have likely already did) & if no change then possibly crack the T hose fitting back there & repeat. are you running a prop valve of any kind?
live every 24 hour block of time like it's your last day on earth
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Re: Bleeding Brakes on a body
[Re: fastfish451]
#2276190
03/25/17 09:58 PM
03/25/17 09:58 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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he has 4 wheel DISCS
So not stock.
And what is "mopar after market master cylinder"?
Who knows what you have so who's to say how it should act.
Some details would be nice
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Bleeding Brakes on a body
[Re: RapidRobert]
#2276191
03/25/17 10:00 PM
03/25/17 10:00 PM
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Joined: Feb 2007
Posts: 149 England
fastfish451
OP
member
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OP
member
Joined: Feb 2007
Posts: 149
England
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yes I am running a stock brass proportioning valve have been running this system for some time just changed some brake lines and really struggling to bleed them just cant remember if pedal was doing this before. mopar performance m cylinder
Last edited by fastfish451; 03/25/17 10:11 PM.
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Re: Bleeding Brakes on a body
[Re: fastfish451]
#2276198
03/25/17 10:12 PM
03/25/17 10:12 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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the cups I am referring to are the MC cups. on a MC with some miles I like to keep those cups in that normal worn area when bleeding (not a dealbreaker but does extend the life of the piston seals). I would crack the line just upstream from the prop valve see what develops. does this valve have the pin that you pull out to bypass the proportioning? EDIT & a block of wood gives your helper more control over the pedal movement & on discs I like to have him pump it several times then with good verbal timing I open the bleeder on his last downstroke as this agitation gets the air out better but we ain't there yet, first we gotta find out what is going on.
Last edited by RapidRobert; 03/25/17 10:18 PM.
live every 24 hour block of time like it's your last day on earth
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Re: Bleeding Brakes on a body
[Re: fastfish451]
#2276224
03/25/17 11:08 PM
03/25/17 11:08 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Last thing I would run is a stock combination valve on an all disc setup.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Bleeding Brakes on a body
[Re: fastfish451]
#2276698
03/26/17 07:38 PM
03/26/17 07:38 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Not without a lot more info than you've given.
Since no A body came with 4 wheel discs stock I cannot begin to guess what you have or what you may or may not need. Other than not needing a stock combination valve in an all disc system
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Bleeding Brakes on a body
[Re: Supercuda]
#2276747
03/26/17 09:23 PM
03/26/17 09:23 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I would bypass the prop valve & see if it bleeds out (I think it will) then take it out for a spin & see how the proportioning feels.
live every 24 hour block of time like it's your last day on earth
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Re: Bleeding Brakes on a body
[Re: fastfish451]
#2277104
03/27/17 12:42 PM
03/27/17 12:42 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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sppongy is air. I would bleed the MC first
live every 24 hour block of time like it's your last day on earth
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Re: Bleeding Brakes on a body
[Re: RapidRobert]
#2277216
03/27/17 04:04 PM
03/27/17 04:04 PM
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Joined: Jun 2005
Posts: 5,124 Western Md.
skicker
"The Champ"
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"The Champ"
Joined: Jun 2005
Posts: 5,124
Western Md.
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On a good 4 wheel disc system Master Cylinder bore and caliper piston diameter come into play for optimal performance. You would be better to not use a proportioning valve and simply plumb in an adjustable one on the rear brakes. If you simply swapped out hoses to new from what you had before it sounds like there is still air trapped somewhere... FWIW sometimes I open the bleeder and then have someone depress the pedal and then close the bleeder during the first attempt at bleeding. Kind of what Robert touched on earlier...
...FAFO...
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