Brake line broke now having trouble bleeding

[Aydenmtb]

Hey all, so the other day when I was driving home I noticed my brake pedal started going down to the floor. I kept trying to brake until I had literally no brakes at all and had to use my e brake to slow my car down. I pulled over and saw there was a whole bunch of fluid on the passenger side front wheel so I figured a brake line popped or something. I used the e brake to limp my car home.
I then popped the wheel off and found that the hard line that threads into the caliper on one side and into the rubber brake line on the other side had broken. Idk if it got corroded or what but the nipple literally snapped off inside the caliper and the whole line fell out.
So then I went to the junk yard and got a new line and replaced it. I then tried to bleed my brakes and just continuously was pulling air out of the calipers. I don’t think the line I replaced is leaking anything as there’s no fluid leaking out of the line but I just cannot seem to get the air out of the system. Any help on this would be greatly appreciated, thank you!

[Jayz691]

What are you using to bleed the system? Pressure bleeder works best, imo. Vac bleeders suck, cuz they keep pulling air past the bleeder threads.
If you ran the res dry, which sounds like you likely did, you'll need to cycle the ABS pump a few times while bleeding.
Whenever I opened the brake system, it was always a bit of a pain to bleed well.
Combination of pressure bleeder, cycle ABS while pressurized, and pumping the pedal while pressurized and bleeder open.

Sent from my CPH2611 using Audizine Forum mobile app

[Aydenmtb]

I’m using a vac bleeder, seems to be working well enough but yes I definitely did run the reservoir dry, how do I cycle the abs while bleeding??

[Theiceman]

VCDS or equivalent.

[Jayz691]

I’m using a vac bleeder, seems to be working well enough but yes I definitely did run the reservoir dry, how do I cycle the abs while bleeding??

VCDS or obdeleven, etc and run an output test procedure. Do yourself a favor and get a pressure bleeder, vac bleeders are crap. I had one, and it was a headache. Pulls air past threads so I kept getting bubbles. Better to push it from the res, and keep it pressurized while pumping and running abs.

Sent from my CPH2611 using Audizine Forum mobile app

[Theiceman]

Pro tip for those using vacuum bleeders.

Put a heavy grease around the base of the bleed nipple, so air is not drawn in through the threads, Also keeps moisture out of the threads and make nipples easier to crack next time.

[Jayz691]

Pro tip for those using vacuum bleeders.

Put a heavy grease around the base of the bleed nipple, so air is not drawn in through the threads, Also keeps moisture out of the threads and make nipples easier to crack next time.

I did that, and it helped a little, but still pulled air in. Was on the stock 15yo calipers, so that prob didn't help. Used a clear silicone grease iirc.

Sent from my CPH2611 using Audizine Forum mobile app

[Aydenmtb]

I’ve read mixed stuff about actually having to cycle the abs so I decided to just bleed the brakes the old fashioned way by pumping the pedal and it worked!

[Jayz691]

I’ve read mixed stuff about actually having to cycle the abs so I decided to just bleed the brakes the old fashioned way by pumping the pedal and it worked!

Well generally, if you empty the res, it's good to bleed the abs. You can also find some loose road, and lock em up a few times, then bleed again.

Sent from my CPH2611 using Audizine Forum mobile app

[Aydenmtb]

Yeah that’s the plan, pedals still a bit spongy so I’ll do that!

[Theiceman]

I did that, and it helped a little, but still pulled air in. Was on the stock 15yo calipers, so that prob didn't help. Used a clear silicone grease iirc.

Sent from my CPH2611 using Audizine Forum mobile app

if you are sucking in high vacuum grease thats serious vacuum you are pullng lol

[Aydenmtb]

Just wanted to update. Got brakes good enough to drive, went and hit a gravel patch and triggered abs a couple times, then went and bled all the brakes again a couple times the old fashioned way and I now have great brakes again. Vacuum bleeder sucks, definitely will invest in a push bleeder for the future.

[Jayz691]

if you are sucking in high vacuum grease thats serious vacuum you are pullng lol

Whatever the vacuum bleeder pulls. They're just garbage, pressure bleeder is the way.


Sent from my CPH2611 using Audizine Forum mobile app