Thread: Odd Brake Issue
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Old 08-04-2021, 04:57 PM
Magister88 Magister88 is offline
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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!
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2004 x5 3.0i AT.
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