Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 07-29-2021, 04:07 PM
Member
 
Join Date: Sep 2015
Location: Northeast
Posts: 446
CapeX5 is on a distinguished road
Odd Brake Issue

Hello All,
05 4.4. Just had 2 rear brake lines that rusted out and I replaced them. Car was operating perfectly before rusted out lines. There was a delay in getting parts and the reservoir leaked all the fluid out. I filled, did a Motiv pressure bleed. Was getting minimal fluid out of rear caliper bleeders. Hooked up my Foxwell and found the brake bleed procedure. Did this numerous times on all wheels. Fronts had plenty of fluid coming out, rears had minimal, with some air. Still not getting brake pressure to the rears. Started disconnecting lines at the ABS module and front circuit was flowing fine, rear very slowly. Figured I messed up the master cylinder. Replaced it. Same situation with fluid flow/quantity to the rears. Took old master apart and realize that the rears won't bleed with pressure in the front brake circuit of the master. I decided to have someone put pressure on the brake pedal, bleed fronts, than with pedal still down, open the rear bleeders and get air and plenty of fluid out. Almost like all 4 need to be bled simultaneously. I have searched everywhere and plenty of posts on the rear brakes being a problem, but no solutions. Now, I can't access the ABS module on my Foxwell and the pedal is super hard. Took for a test drive and the brakes started to seize up and I had to release the pressure at the ABS module where the 4 lines come out of the top to each wheel to release the calipers. I do have INPA and tried to access the ABS/DSC module but could not find it.
I am so sick of this car and how complicated it is. I would appreciate any help or suggestions sorry for the length of this but thought all information was pertinent.
__________________
Dave S.
Northeast
2003 4.6is
2005 E53 4.4
2003 E39 Msport(a REAL ONE!)
1959 Fiat 600
Reply With Quote

Sponsored Links

  #2  
Old 07-29-2021, 06:38 PM
Member
 
Join Date: Mar 2016
Location: Saskatchewan Canada
Posts: 1,244
80stech is on a distinguished road
Try releasing the pressure at the master cylinder instead of at the ABS controller. It's possible that you have a bad master or that the pedal/rod is not allowing the piston all the way back.
__________________
1988 325is (purchased new)
2004 X5 3.0 (new to me) 2005 X3 2.5 (new to wife)
Reply With Quote
  #3  
Old 07-29-2021, 09:05 PM
Member
 
Join Date: Jun 2014
Location: Omaha, NE
Posts: 1,508
cn90 is on a distinguished road
- If the brake system worked BEFORE the repair, then the issues you have now are related to the repair job.

- I wrote a DIY for brake lines (in forum if you search for it), the key thing is to use a wood stick and partially depress the brake pedal to stop the fluid loss.

- Now you have air in system. I don't know much about Foxwell since I use INPA.
You can put everything back together and use Foxwell etc. to activate the ABS valves to bleed...
__________________
1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT
Reply With Quote
  #4  
Old 07-30-2021, 12:25 AM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 8,218
andrewwynn will become famous soon enough
Odd Brake Issue

The symptoms match a booster set too tight. A not that uncommon error when changing a MC. I've seen it 3 times in the past 2 years on XO. I don't know the procedure on e53 to adjust but found on YouTube for a buddy with his f150
__________________
E53 / M54 2001 3.0i gas LHD (pair of them: his & her)

Last edited by andrewwynn; 07-30-2021 at 12:32 AM.
Reply With Quote
  #5  
Old 07-30-2021, 06:33 AM
Member
 
Join Date: Apr 2005
Location: England
Posts: 93
Moments is on a distinguished road
My E53 burst a line while away from home and needed a repair. The change of the line was easy for the mechanic but the bleeding was a real problem after the fluid loss - which to my untrained eye looked pretty substantial. It took a few people and a lot of time and fluid to get the pedal back to where it had been. I would imagine that the a part of the problem here is air working its way back to the ABS unit and being very stubborn to clear.
Reply With Quote
  #6  
Old 07-30-2021, 10:01 AM
Member
 
Join Date: Apr 2019
Location: Boston, MA
Posts: 483
Effduration is on a distinguished road
Quote:
Originally Posted by cn90 View Post
- If the brake system worked BEFORE the repair, then the issues you have now are related to the repair job.

- I wrote a DIY for brake lines (in forum if you search for it), the key thing is to use a wood stick and partially depress the brake pedal to stop the fluid loss.

- Now you have air in system. I don't know much about Foxwell since I use INPA.
You can put everything back together and use Foxwell etc. to activate the ABS valves to bleed...
+1 on this....

I don't think there is a problem with your ABS module or master cylinder. The E53's are just difficult to bleed. I had a similar issue with mine when I replaced a portion of brake lines.

I would hook everything back up and bleed again.
Look up instructions on how to use INPA or foxwell to bleed the ABS pump.
then use BOTH the pressure bleed and the two-man method.

Hook up the pressure bleeder while a friend pumps the brake and you open/close the bleed screw.

As you noted, the front/back balancing valve will limit how much fluid comes out the back, so you have to open and close multiple times.
Reply With Quote
  #7  
Old 07-31-2021, 06:41 AM
Member
 
Join Date: Sep 2015
Location: Northeast
Posts: 446
CapeX5 is on a distinguished road
Thanks for all the replies, it is helpful. I have continued to bleed it and now I get the fronts that seem to be binding on when they get hot. To the point of setting off the "4X4 INACTIV" and the DSC code being thrown. The only way to get it to unlock the fronts is to release the front circuit at the MC. I am running out of helpers and ideas on what else to do. It is becoming a real issue due to it being my main mode of transportation. There is hardly and play in the pedal and it is hard as a rock.
__________________
Dave S.
Northeast
2003 4.6is
2005 E53 4.4
2003 E39 Msport(a REAL ONE!)
1959 Fiat 600
Reply With Quote
  #8  
Old 07-31-2021, 06:44 AM
Member
 
Join Date: Sep 2015
Location: Northeast
Posts: 446
CapeX5 is on a distinguished road
INPA

I have INPA and tried to find the menu to do the bleeding there. I found a video for a 330 that explained how he did it. E53, chassis, abs/dsc module, Activate....nothing for brake bleeding. Any thoughts?
Quote:
Originally Posted by cn90 View Post
- If the brake system worked BEFORE the repair, then the issues you have now are related to the repair job.

- I wrote a DIY for brake lines (in forum if you search for it), the key thing is to use a wood stick and partially depress the brake pedal to stop the fluid loss.

- Now you have air in system. I don't know much about Foxwell since I use INPA.
You can put everything back together and use Foxwell etc. to activate the ABS valves to bleed...
__________________
Dave S.
Northeast
2003 4.6is
2005 E53 4.4
2003 E39 Msport(a REAL ONE!)
1959 Fiat 600
Reply With Quote
  #9  
Old 08-04-2021, 04:34 PM
Member
 
Join Date: Sep 2015
Location: Northeast
Posts: 446
CapeX5 is on a distinguished road
A follow up to close this thread out. I found very little definitive information on the common rear brake line bleeding issue. I finally got this resolved but it took HOURS!!! I did the following 3 things. Moved the coolant reservoir out of the way to access the top of the ABS pump. Used my Foxwell to activate the pump while loosening each 4 lines a little one at a time and bled whatever air was in there out. All the while I had my pressure bleeder connected to reservoir on master cylinder with 20lbs of pressure. Once I new the air was out of the master and ABS pump I moved to the rear lines. There was no way to be sure all air was out of the above procedure, but I must have done the procedure 5-6 times. At the RR wheel I hooked up a clear hose and bottle to monitor the air coming out of the line. Open the bleeder and you will see a very slow trickle of fluid coming out via gravity/pressure from the pressure bleeder. I activated the ABS pump via the Foxwell 3 times. Than I would do a slow pump on the brake pedal 6 times. All the while monitor the fluid in reservoir so you don't run out. I did the same on the LR wheel. This process was painful slow and I was really wondering whether I had another problem or ???. So many small bubbles kept coming out I never thought it would end. This literally took me probably 10 hours with different interations of bleeding everything. Feel free to reach out if you have any questions. I also replaced the master cylinder thinking that was the issue.....it wasn't! But I now know how to do that. Good luck.
__________________
Dave S.
Northeast
2003 4.6is
2005 E53 4.4
2003 E39 Msport(a REAL ONE!)
1959 Fiat 600
Reply With Quote
  #10  
Old 08-04-2021, 04:57 PM
Member
 
Join Date: Aug 2020
Location: New York
Posts: 13
Magister88 is on a distinguished road
Quote:
Originally Posted by CapeX5 View Post
A follow up to close this thread out. I found very little definitive information on the common rear brake line bleeding issue. I finally got this resolved but it took HOURS!!! I did the following 3 things. Moved the coolant reservoir out of the way to access the top of the ABS pump. Used my Foxwell to activate the pump while loosening each 4 lines a little one at a time and bled whatever air was in there out. All the while I had my pressure bleeder connected to reservoir on master cylinder with 20lbs of pressure. Once I new the air was out of the master and ABS pump I moved to the rear lines. There was no way to be sure all air was out of the above procedure, but I must have done the procedure 5-6 times. At the RR wheel I hooked up a clear hose and bottle to monitor the air coming out of the line. Open the bleeder and you will see a very slow trickle of fluid coming out via gravity/pressure from the pressure bleeder. I activated the ABS pump via the Foxwell 3 times. Than I would do a slow pump on the brake pedal 6 times. All the while monitor the fluid in reservoir so you don't run out. I did the same on the LR wheel. This process was painful slow and I was really wondering whether I had another problem or ???. So many small bubbles kept coming out I never thought it would end. This literally took me probably 10 hours with different interations of bleeding everything. Feel free to reach out if you have any questions. I also replaced the master cylinder thinking that was the issue.....it wasn't! But I now know how to do that. Good luck.
This is very different experience from mine, my rear right line rusted out at the union where it crosses to the right rear side. Lost all the brake fluid in the reservoir as I was driving the car. After replacing the lines, i added the brake fluid, and used the pressure bleeder as well. using a scan tool i cycled the ABS pump 3x for each wheel while there was pressure applied to reservoir (most air came out from RR). and had good flow. took about 1.5 hrs to bleed all 4. and the pedal feels great. I wonder why it happened to you this way . i do have 3.0i 2004 x5. Anyway good you got it done!
__________________
2004 x5 3.0i AT.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 01:30 PM.
vBulletin, Copyright 2021, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.