2006 BMW 530xi brake problems - Bimmerfest - BMW Forums



Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E60 / E61 (2004 - 2010)

E60 / E61 (2004 - 2010)
BMW 5-Series E60 Sedan was first seen in the Unites States in the fall of 2003 with a 2004 Model Year designation. The E61 wagon followed shortly there after. The E60/E61 5 series is now available as a 528i, 528xi, 535i, 535xi, 550i and a 535xi sports wagon! -- View the E60 Wiki

Reply
 
Thread Tools Display Modes
  #1  
Old 10-17-2019, 03:59 PM
[email protected] rn3077998@gmail is offline
Registered User
 
Join Date: Mar 2019
Posts: 3
Mein Auto:
2006 BMW 530xi brake problems

I'm having trouble with my brakes.i've replaced the abs pump, master cylinder, and one of the flex lines and I've bled the brakes numurous times and still not getting brake pressure any ideas would help
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 10-17-2019, 06:37 PM
dharmabmw dharmabmw is offline
Officially Welcomed to the 'Fest
Location: Ottawa, Canada
 
Join Date: Jul 2014
Posts: 1,848
Mein Auto: 2006 530Xi
What method did you use to bleed the brakes? I have always used the pump the pedal crack the bleeder method. Sure, you need a second person but it's always worked for me.
__________________
2006 E61 MT
2010 E91 MT
Reply With Quote
  #3  
Old 10-17-2019, 06:40 PM
audiophool audiophool is offline
BMWs since '87
Location: Chestermere AB Canada
 
Join Date: Aug 2012
Posts: 320
Mein Auto: 2008 535xi (LCI)
Pressure bleed with ABS actuation using INPA or a capable scan tool. It's hard to get air out of the MC and ABS pump without these methods. Did you bench-bleed the master cylinder?
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 10-17-2019, 06:58 PM
[email protected] rn3077998@gmail is offline
Registered User
 
Join Date: Mar 2019
Posts: 3
Mein Auto:
No matter what method I've used to bleed the brakes it doesn't seem to help them
Reply With Quote
  #5  
Old 10-17-2019, 08:25 PM
dharmabmw dharmabmw is offline
Officially Welcomed to the 'Fest
Location: Ottawa, Canada
 
Join Date: Jul 2014
Posts: 1,848
Mein Auto: 2006 530Xi
Quote:
Originally Posted by [email protected] View Post
No matter what method I've used to bleed the brakes it doesn't seem to help them
Have you checked for additional leaks in the system? I replaced the rear lines, only to have a hose rupture while I was doing the initial bleed. Also, if any fitting has not been fully tightened, you could have a very small leak, which will definitely give a spongy feel to the pedal. What brake fluid are you using? It has to be DOT 4, low viscosity (LV).
__________________
2006 E61 MT
2010 E91 MT
Reply With Quote
  #6  
Old 10-17-2019, 08:32 PM
audiophool audiophool is offline
BMWs since '87
Location: Chestermere AB Canada
 
Join Date: Aug 2012
Posts: 320
Mein Auto: 2008 535xi (LCI)
Quote:
Originally Posted by [email protected] View Post
No matter what method I've used to bleed the brakes it doesn't seem to help them
What methods have you used?
Reply With Quote
  #7  
Old 10-17-2019, 09:22 PM
[email protected] rn3077998@gmail is offline
Registered User
 
Join Date: Mar 2019
Posts: 3
Mein Auto:
I've used the two person method,bench bleed, and even the pump bleed, and yes I am using dot-4 brake fluid I just don't understand why they are not working
Reply With Quote
  #8  
Old 10-18-2019, 02:41 AM
Burning2nd's Avatar
Burning2nd Burning2nd is online now
Under the lift arms
Location: Under the lift Arm
 
Join Date: Aug 2010
Posts: 12,236
Mein Auto: e39, e83, e60
your not doing something right,

OR you have a leak in the system,

IF YOU put fluid in the resivor, and open one corrner @ a time.. you either get fluid there.. OR you do not..
__________________
Specializing In Breaking Things Professionally


15486372<-----
Reply With Quote
  #9  
Old 10-18-2019, 10:17 AM
audiophool audiophool is offline
BMWs since '87
Location: Chestermere AB Canada
 
Join Date: Aug 2012
Posts: 320
Mein Auto: 2008 535xi (LCI)
It's hard to get air out of the ABS pump without cycling it.

A vacuum bleeder could work as well. I've found with vacuum bleeders you need to remove the bleed screw entirely, and turn a tapered plastic fitting in the bleed screw hole in order to achieve a good seal. Otherwise you'll pull air past the bleed screw threads and not build good vacuum in the brake line.

We're assuming you have been able to get fluid out of each caliper (?) and you can't get a firm pedal. If this is the case, you have air in a line (or a leak). If there's a leak I would expect to find brake fluid coming out.
Reply With Quote
  #10  
Old 10-18-2019, 10:28 AM
dharmabmw dharmabmw is offline
Officially Welcomed to the 'Fest
Location: Ottawa, Canada
 
Join Date: Jul 2014
Posts: 1,848
Mein Auto: 2006 530Xi
A dab of Teflon pipe dope on the threads of the bleeder screw will prevent air from passing through the threads. A lot of replacement bleed screws have a red coating on the threads that accomplishes the same thing.
__________________
2006 E61 MT
2010 E91 MT
Reply With Quote
  #11  
Old 10-18-2019, 02:50 PM
twh twh is online now
Officially Welcomed to the 'Fest
Location: Fairfax, VA
 
Join Date: Nov 2015
Posts: 3,506
Mein Auto: '06 530xi 6sp, '09 X5 3.0
The air passing by the threads drives me nuts when I bleed the brakes.
Reply With Quote
  #12  
Old 10-18-2019, 03:03 PM
Burning2nd's Avatar
Burning2nd Burning2nd is online now
Under the lift arms
Location: Under the lift Arm
 
Join Date: Aug 2010
Posts: 12,236
Mein Auto: e39, e83, e60
YOUR bleeder is bad.. Or your caliber is bad

the threads are not what seals the fitting...

Guys its a hydraulic fitting, donest work like that ...

there should be no pipe dope, there should be no Teflon
__________________
Specializing In Breaking Things Professionally


15486372<-----
Reply With Quote
  #13  
Old 10-18-2019, 04:54 PM
dharmabmw dharmabmw is offline
Officially Welcomed to the 'Fest
Location: Ottawa, Canada
 
Join Date: Jul 2014
Posts: 1,848
Mein Auto: 2006 530Xi
It's the contact of metal to metal at the seat and the tube end or the bleeder screw taper tip that provides the seal but due to tolerances in thread manufacturing, there will always be a gap, however small, that needs to be sealed especially when you are opening and closing the bleeder screw. A small dab solves this.
__________________
2006 E61 MT
2010 E91 MT
Reply With Quote
  #14  
Old 10-18-2019, 06:30 PM
audiophool audiophool is offline
BMWs since '87
Location: Chestermere AB Canada
 
Join Date: Aug 2012
Posts: 320
Mein Auto: 2008 535xi (LCI)
Fully aware that a tapered seat is what seals the bleed screw. But when you're using a vacuum bleeder, the threads let air past which bubbles in the vacuum line so you never know if the line is actually bled.

I would never put anything on the threads to try a seal for vacuum bleeding with the possible exception of teflon tape. Nothing liquid that might get sucked into the caliper. I use a Motive pressure bleeder and activate the ABS/DSC pump using my Foxwell scan tool.
Reply With Quote
  #15  
Old 10-18-2019, 09:10 PM
twh twh is online now
Officially Welcomed to the 'Fest
Location: Fairfax, VA
 
Join Date: Nov 2015
Posts: 3,506
Mein Auto: '06 530xi 6sp, '09 X5 3.0
Not just a vacuum bleeder. A pressure bleeder as well pull air in past the threads as the fluid is forced out. You can fiddle with the bleed screw and push and pull it and make the bubbles go away.
Reply With Quote
  #16  
Old 10-19-2019, 07:56 AM
tttomttt tttomttt is offline
Officially Welcomed to the 'Fest
Location: Long Island NY
 
Join Date: Oct 2010
Posts: 157
Mein Auto: 2005 530i, 05 X5 3.0, 04
to be clear pipe dope is only a lubricant it is not a sealer of any kind. That being said it will allow the bleeder screw to thread in further due to it s lubricating nature thus sealing itself as designed.
Reply With Quote
  #17  
Old 10-19-2019, 08:04 AM
twh twh is online now
Officially Welcomed to the 'Fest
Location: Fairfax, VA
 
Join Date: Nov 2015
Posts: 3,506
Mein Auto: '06 530xi 6sp, '09 X5 3.0
Pipe dope is a sealer. That's how and why it is used in plumbing applications.

The bleeder screw does not need to "thread in further" to do its job. The bleeder screw is tapered at the end and fits into a seat that is tapered and that's what achieves the seal.

But, putting anything on the threads of the bleeder screw makes me uncomfortable since there is a risk of contamination back into the system.
Reply With Quote
  #18  
Old 10-19-2019, 08:24 AM
dharmabmw dharmabmw is offline
Officially Welcomed to the 'Fest
Location: Ottawa, Canada
 
Join Date: Jul 2014
Posts: 1,848
Mein Auto: 2006 530Xi
I have never had any success with a vacuum bleed method especially on my BMW.

So called "problem solver" replacement bleed screws come pre-coated with a red sealing compound on the threaded portion.

The amount of pipe dope I use is equivalent to two or three match heads and is only on the threaded portion of bleeder, so I am not concerned about it being drawn into the system. The reason being, to properly bleed the brakes requires almost 250 ml of fluid being pumped out of each caliper. Any Teflon that might be drawn in is probably flushed out during the bleed procedure. That fluid is then disposed of.

I am not advocating using it at all unions or connections only at troublesome bleed screws.
__________________
2006 E61 MT
2010 E91 MT
Reply With Quote
  #19  
Old 10-19-2019, 09:44 AM
audiophool audiophool is offline
BMWs since '87
Location: Chestermere AB Canada
 
Join Date: Aug 2012
Posts: 320
Mein Auto: 2008 535xi (LCI)
Quote:
Originally Posted by twh View Post
Not just a vacuum bleeder. A pressure bleeder as well pull air in past the threads as the fluid is forced out. You can fiddle with the bleed screw and push and pull it and make the bubbles go away.
No. If you pressurize the system from the master cylinder, fluid coming out of the bleed screw is under pressure so it will come out the hole in the center (into your clear tubing), and if there's space around the threads fluid will seep past them, not draw air through.

But if OP did various methods including "pump bleed" which presumably is the ABS/DSC method, there's definitely something else going on here.
Reply With Quote
  #20  
Old 10-19-2019, 01:10 PM
twh twh is online now
Officially Welcomed to the 'Fest
Location: Fairfax, VA
 
Join Date: Nov 2015
Posts: 3,506
Mein Auto: '06 530xi 6sp, '09 X5 3.0
That's not what happens. The bleed hole is big enough and the pressure bleeder pressure is low enough for the fluid to not want to go out past the threads...and the movement of the fluid causes the air to get sucked in past the threads due to a localized low pressure created by the fluid movement (aka Bernoulli effect).
Reply With Quote
  #21  
Old 10-19-2019, 01:53 PM
dharmabmw dharmabmw is offline
Officially Welcomed to the 'Fest
Location: Ottawa, Canada
 
Join Date: Jul 2014
Posts: 1,848
Mein Auto: 2006 530Xi
Quote:
Originally Posted by audiophool View Post
......... if OP did various methods including "pump bleed" which presumably is the ABS/DSC method, there's definitely something else going on here.
Quote:
Originally Posted by twh View Post
....... The bleed hole is big enough and the pressure bleeder pressure is low enough for the fluid to not want to go out past the threads...and the movement of the fluid causes the air to get sucked in past the threads due to a localized low pressure created by the fluid movement (aka Bernoulli effect).
I agree with both of you and that's why I use a bit of pipe dope on the bleeder screw .
__________________
2006 E61 MT
2010 E91 MT
Reply With Quote
  #22  
Old 10-19-2019, 02:21 PM
audiophool audiophool is offline
BMWs since '87
Location: Chestermere AB Canada
 
Join Date: Aug 2012
Posts: 320
Mein Auto: 2008 535xi (LCI)
Quote:
Originally Posted by twh View Post
That's not what happens. The bleed hole is big enough and the pressure bleeder pressure is low enough for the fluid to not want to go out past the threads...and the movement of the fluid causes the air to get sucked in past the threads due to a localized low pressure created by the fluid movement (aka Bernoulli effect).
Not at this pressure. You're talking about a siphon effect that might happen at 1500psi, not 15psi, and not with a bleed screw that has its inlet 90 degrees to flow.

Still, we're not really helping OP with this. OP needs to confirm the "pump bleed" was the scanner activation of ABS/DSC pump, and not a manual pedal pumping bleed method.
Reply With Quote
Reply

See More Related BMW Stories


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E60 / E61 (2004 - 2010)
Today's Posts Search
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 On



Forum Jump


All times are GMT -7. The time now is 03:00 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
© 2001- VerticalScope Inc. All rights reserved.