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01-07-2024, 04:23 PM | #1 |
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Introduced Air While Flushing Brakes
Hi guys,
I was doing my year 2 maintenance and flushed my entire brake system using the Motive pressure power bleeder but have introduced air to the last caliper because I ran out of brake fluid in the bank. While I was releasing old fluid, I started seeing air bubbles come out and suction sound indicating there's no more fluid left in the bleeder tank. I immediately tightened the bleeder screw and checked the brake cylinder and saw that it was empty (below minimum). Prior to starting, I made sure to fill it to "Max." My question is, what should I do to correct this?
Thanks for your help Last edited by boba7523; 01-07-2024 at 04:32 PM.. |
01-07-2024, 05:37 PM | #2 |
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Fill the brake reservoir up to the max line, then fill the motive tank up. Always over-fill to avoid these kinds of situations. I realize brake fluid can be expensive but why risk under-filling the tank like this and introducing air? You should be able to evacuate all the air but definitely do the ISTA workflow to trigger the pump and bleed the ABS properly just in case. I have not run it myself as I am still new to BMW tools, I'm sure somebody else can advise on the how-to.
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01-07-2024, 05:39 PM | #3 |
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thankfully it is the last caliper so it should be the shortest distance/amount of fluid to flush.
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01-07-2024, 05:56 PM | #4 | |
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If brake pedal mushiness indicates air in the lines, what kind of symptoms should I expect air in ABS to have? |
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01-07-2024, 06:15 PM | #6 |
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https://www.m3post.com/forums/showth...abs+activation
found this in the brake flush DIY, make sure you research the DIY section. hope it helps |
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01-07-2024, 09:14 PM | #7 | |
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01-07-2024, 09:16 PM | #8 |
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You would be better off asking I that forum to be honest. There is a very active community over there and plenty of DIY guides.
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01-07-2024, 09:18 PM | #9 |
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Also, doubtful on the clutch. You have to give air an avenue to travel if you didn’t crack the clutch bleeder why would it move down that circuit?
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01-10-2024, 12:48 AM | #10 | |
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https://f80.bimmerpost.com/forums/sh...58&postcount=1 |
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