Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > Welcome to Bimmerfest > New Member Introductions

New Member Introductions
Welcome to Bimmerfest! Whether you are a current BMW owner or just interested in BMW cars, we hope you enjoy your visit. Take a moment to introduce yourself and post a picture of your BMW for the rest of the community to see.

Reply
 
Thread Tools Display Modes
  #1  
Old 10-16-2012, 10:52 PM
igorbmwx5 igorbmwx5 is offline
Registered User
Location: San Francisco, CA
 
Join Date: Oct 2012
Posts: 8
Mein Auto: 2009 BMW X5 E70 3.0si
Strange issue with bubbles in rear brake calipers

Hello to everyone,

This weekend I finally for to replacing brake fluid in my 2009 X5 E70 with 50k miles on it. Well, I ran into something very strange. I started with rear calipers and when they were bleeding, I saw small bubble come out from them together with fluid. Front calipers had no bubbles. But the strange thing is that either before I bled the whole system or after, brakes did not feel spongy at all. Does anyone know what those bubbles in the rear brake calipers were all about?
Reply With Quote
Ads by Google
  #2  
Old 10-17-2012, 10:59 AM
Fast Bob's Avatar
Fast Bob Fast Bob is offline
Keeping it surreal
Location: Here, there, everywhere....
 
Join Date: Jun 2004
Posts: 33,103
Mein Auto: 2004 330Ci ZHP 3 pedals
Quote:
Originally Posted by igorbmwx5 View Post
Hello to everyone,

This weekend I finally for to replacing brake fluid in my 2009 X5 E70 with 50k miles on it. Well, I ran into something very strange. I started with rear calipers and when they were bleeding, I saw small bubble come out from them together with fluid. Front calipers had no bubbles. But the strange thing is that either before I bled the whole system or after, brakes did not feel spongy at all. Does anyone know what those bubbles in the rear brake calipers were all about?
Air bubbles can be devious and stubborn. I always give the calipers a few raps with a small nylon mallet to dislodge them, and start the bleed at the caliper farthest away from the master cylinder.
__________________
The road goes ever onward....
(R.I.P. Jever)

*Please support the Wounded Warrior Project*
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > Welcome to Bimmerfest > New Member Introductions
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 03:16 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms