Brake bleeding

[MySabre]

I have a 2018 JL that I just replaced both front calipers! On! The back caliper bleed went smoothly. The front, not so much! Im using the same method (vacuum method) on the front as I did the back! I’m getting hardly any fluid to come out of either front caliper! I even went old school and had a helper in the drivers seat pushing on the pedal, holding there foot down while I turned the bleed screw! Same result, the back caliper bleeding was smooth with no issues! The front, still can’t get hardly any fluid out of the bleed valves! What am I missing?

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[Rogersocal]

It takes some time to purge all that air, but if thats not really happening no matter what then:

Safe to assume a blockage of some sort. Start by removing the bleed fitting completely, pump the brake a few times and see if fluid comes out, If not the next disconnect point is going into the caliper. Disconnect that and try a light pump a few times, if fluid comes out you have a bad/blocked caliper, if not, keep working your way back till a disconnect eventually pumps fluid out and you will have the culprit.

Note, may want to keep a finger over each opening you create as your working backwards in the system just to see if you can feel the pressure from the pump.

 

[azjl#3]

Stupid question, is air or more fluid able to get into master cylinder?

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