Bleeding Brake Problems

xjoffroad · Sep 13, 2006

Started to bleed my brakes yesterday and found out that I needed to replace my master cylinder because it was leaking. I bench bleed the master cylinder before I bolted it back on like the instructions say. Tried to bleed my brakes today and I bleed all 4 corners about 3 dozen times. Pressure builds up and there is no air coming out of the bleeder valves. Once I turn the XJ on the brakes go done to the floor. Its not leaking brake fluid anywhere I can see. What is wrong?? Im getting pissed!

junkyard jim · Sep 13, 2006

What year? ABS or not? Does it have 2 lines going to the back? Can you get a pic of the combo valve? (mine had an extra line I had to open to let the air out)

CrustyJeep · Sep 13, 2006

Start by narrowing it to a corner, or an end. Pinch off soft likes until you get a good firm, extra firm actual, pedal.

It could be your rears are way out of adjustment.

xjoffroad · Sep 14, 2006

it a 89. no abs. 1 line goin to the back. i dont have an extra line

junkyard jim said:
What year? ABS or not? Does it have 2 lines going to the back? Can you get a pic of the combo valve? (mine had an extra line I had to open to let the air out)

xjoffroad · Sep 14, 2006

i have bleed the rears, not kiding, probably 13 times.

CrustyJeep said:
Start by narrowing it to a corner, or an end. Pinch off soft likes until you get a good firm, extra firm actual, pedal.

It could be your rears are way out of adjustment.

KarlVP · Sep 14, 2006

This has been a frequent topic on the Naxja boards, and I have never seen a solution posted. You are screwed.

Seriously though, have you tried starting and pumping the pedal several times? I know on the early XJ's the brake booster sucks. It failed on my 88 and had to be replaced. Check your vacuum line to it.