Rear brakes aren't bleeding

[lolcantturn]

As title says, I pumped it prior to bleeding, opened the valve, then pumped again and nothing came out. Wut?

[lolcantturn]

Bump.

[jlevie]

I take it this happens with both rear calipers? If that is the case, crack the line to the rear brakes at the ABS unit. If you can't get fluid out there, crack the line for the rear brakes where it enters the ABS unit. If that doesn't produce fluid, the master cylinder is bad. If you get fluid going into the ABS, but not out, the ABS unit is bad. If you get fluid out of the ABS unit, but not at either rear caliper. the bias valve is plugged, or the line to the rear of the car is obstructed.

[lolcantturn]

I take it this happens with both rear calipers? If that is the case, crack the line to the rear brakes at the ABS unit. If you can't get fluid out there, crack the line for the rear brakes where it enters the ABS unit. If that doesn't produce fluid, the master cylinder is bad. If you get fluid going into the ABS, but not out, the ABS unit is bad. If you get fluid out of the ABS unit, but not at either rear caliper. the bias valve is plugged, or the line to the rear of the car is obstructed.

Ok thanks, I'll try this tomorrow.

[lolcantturn]

How weird. I didn't do what jlevie said yet because I had work yesterday so I had no time, but last night I was chasing another car around twisties with a lot of hard braking. By the end of the night, I noticed there was severe brake dust on my left rear wheel, and some on my right rear wheel! So I guess the brakes do work..occasionally..under heavy braking? :loco:

But I'll get back to diagnosing why it's not bleeding.

[drumad]

As title says, I pumped it prior to bleeding, opened the valve, let the fluid flow, closed the valve, then repeated. Wut?

I hope you actually did those above steps.

And why are you even doing spirited driving without properly bled brakes?

If you did in fact do the above process, you should just track the lines piece by piece.

Open the rear valves and pump, if no fluid
Disconnect the soft lines and pump, if no fluid
Disconnect the hardlines at the tee, if no fluid

You get what I'm saying.

[lolcantturn]

I hope you actually did those above steps.

And why are you even doing spirited driving without properly bled brakes?

If you did in fact do the above process, you should just track the lines piece by piece.

Open the rear valves and pump, if no fluid
Disconnect the soft lines and pump, if no fluid
Disconnect the hardlines at the tee, if no fluid

You get what I'm saying.

I mean, I did know the limits of my brakes, though you're right it's not necessarily a smart idea.
Where would the soft and hard lines be at? :/
Thanks.

[lolcantturn]

I hope you actually did those above steps.

And yes, that's what I was trying to accomplish, but no fluid came out.

[leone30]

In my case, I loosen the bleeder on the rear brake caliper and used .030 dia cooper wire to punch
thru deposits on the caliper wall. and after I could bleed with no problem. At some reason, front brakes I bled with no problem, only the rear were blocked.

[drumad]

I mean, I did know the limits of my brakes, though you're right it's not necessarily a smart idea.
Where would the soft and hard lines be at? :/
Thanks.

Although the brakes wouldnt necessarily fail, they can possibly not respond as you'd like them too. Just be safe ya know!

Soft lines are the ones connected to the calipers, and the actual hardlines are well, the hard brake lines.

[lolcantturn]

In my case, I loosen the bleeder on the rear brake caliper and used .030 dia cooper wire to punch
thru deposits on the caliper wall. and after I could bleed with no problem. At some reason, front brakes I bled with no problem, only the rear were blocked.

Eek I should have probably done that! It's probably blocked! Which can explain the rear brakes only working when I'm braking real hard..

Although the brakes wouldnt necessarily fail, they can possibly not respond as you'd like them too. Just be safe ya know!

Soft lines are the ones connected to the calipers, and the actual hardlines are well, the hard brake lines.

I feel you on that one!
And yeah I figured once I actually was looking at the brake assemblies..I felt a flexibility line and then I felt a hard line and I was like "oh..well I guess that's what he was talking about.."
time to get back to fixing this brake problem! Thanks guys.

[lolcantturn]

Awesome, just as I'm about to bleed the right rear caliperthe bleed screw breaks off flush with the caliper! Can I bleed it from the softlines? If so, how?

[drumad]

lol no.

get it out and get a new bleeder

[nrubenstein]

Rebuilt calipers are available for ~$30 with no core. Just replace them, along with the hoses.

[lolcantturn]

lol no.

get it out and get a new bleeder

Well that's going to be a bitch. It's cut off flush with the caliper.. time to get creative with the dremel and make a notch for a flathead :(

Rebuilt calipers are available for ~$30 with no core. Just replace them, along with the hoses.

Where at? Pelican parts only has front rebuilt ones.