[FLOSS M]

After reading this .... I just let the dealer do the swap for SRF
Nothing like the F8x - that was easy

[yousefnjr]

Here’s the procedure from TIS

https://g80.bimmerpost.com/forums/at...3&d=1648490317

[Dabeamerking]

Learned your lesson. Ista is always MVP

[LuvMyE92]

Huh. I had momentarily forgotten that we had the DBW brakes on these cars, although I don't think it's as complicated as it was on the servo system on the motorcycles. Those were a pain to bleed, at least on my R1150RT anyway.

I don't use the vacuum method, rather I put positive pressure (about 1 bar) in the reservoir to push the fluid through. I also (as others noted) siphon out most of the fluid in the master cylinder reservoir first, just to shorten the time required.

Hopefully doing it this way (like a vacuum bleed but opposite) with no pumping, ignition off, etc., won't cause the computer to freak out.

[FISH22]

Originally Posted by LuvMyE92

Huh. I had momentarily forgotten that we had the DBW brakes on these cars, although I don't think it's as complicated as it was on the servo system on the motorcycles. Those were a pain to bleed, at least on my R1150RT anyway.

I don't use the vacuum method, rather I put positive pressure (about 1 bar) in the reservoir to push the fluid through. I also (as others noted) siphon out most of the fluid in the master cylinder reservoir first, just to shorten the time required.

Hopefully doing it this way (like a vacuum bleed but opposite) with no pumping, ignition off, etc., won't cause the computer to freak out.

There are a few of us that are thinking a pressure bleed with the car completely off, maybe even battery disconnected shouldn’t raise issues. Mainly because the pressure being applied to the MC is downstream from the pedal servo. Worst case, faults can be cleared with Bimmerlink.

[Hawkdog]

So…has anyone had the cojones to try a pressure bleed with the battery disconnected and not using ISTA? Had a lot of folks on this thread and others pontificating that they think it would work, but have not seen a single post from anyone that has actually tried it and their result.

[Hawkdog]

Originally Posted by Hawkdog

So…has anyone had the cojones to try a pressure bleed with the battery disconnected and not using ISTA? Had a lot of folks on this thread and others pontificating that they think it would work, but have not seen a single post from anyone that has actually tried it and their result.

I’ll take that as a no.

[B_davis]

Kies recently did a video where they swapped pads and brake lines. They did a pressure bleed with no mention of any triggering any faults. The only thing they showed on the video was using protools to put the rear brakes in service mode so that they could change the pads.

The pressure bleed with the battery disconnected was also the same method that is used on Alfa QV with bbw.

[BrendanZ0402]

Originally Posted by B_davis

Kies recently did a video where they swapped pads and brake lines. They did a pressure bleed with no mention of any triggering any faults. The only thing they showed on the video was using protools to put the rear brakes in service mode so that they could change the pads.

The pressure bleed with the battery disconnected was also the same method that is used on Alfa QV with bbw.

FWIW I did a pressure bleed (motive bleeder) on my buddy's QV with the battery connected and no faults were displayed as well. Will report back once I bleed my car!

[Jon H]

Originally Posted by BrendanZ0402

FWIW I did a pressure bleed (motive bleeder) on my buddy's QV with the battery connected and no faults were displayed as well. Will report back once I bleed my car!

Keep us posted. I have new brake pads coming in on Tuesday. I may attempt to do a pressure bleed at the same time as pad change. This really shouldn't be that complicated but here we are.

[ginohhh]

Any brave souls take a plunge in testing the theory of having the car off/battery dc’d and pressure bleed it with a motive bleeder?

Any info/update would be appreciated! I got an upcoming track day in a few weeks and I’m trying to prep my car. Not sure if should just cough up $ and take it to the stealership and have them do it.

[Curious41]

Originally Posted by ginohhh

Any brave souls take a plunge in testing the theory of having the car off/battery dc’d and pressure bleed it with a motive bleeder?

Any info/update would be appreciated! I got an upcoming track day in a few weeks and I’m trying to prep my car. Not sure if should just cough up $ and take it to the stealership and have them do it.

I used the motive bleeder without disconnecting the battery and had no problems.

[ginohhh]

Originally Posted by Curious41

I used the motive bleeder without disconnecting the battery and had no problems.

This is refreshing to hear. I’ll probably try it out this coming weekend.