Issues bleeding brakes

[Loyaltyisking]

I just installed baer T4s in the front of my chevelle, SS4s in the rear, with a wilwood tandem master cylinder.. and a baer prop valve for the rear brakes. I CAN NOT FOR THE LIFE OF ME FIGURE OUT WHY THE REAR BRAKES WONT BLEED?!?!?! The fronts are fine. The prop valve gets fluid. The rear brakes are not wet anywhere. ANY IDEAS WOULD BE APPRECIATED

[Plastik Racer]

I once had the same issue and was to the point of pulling out my hair, but then I noticed I installed the the calipers on the wrong sides and the bleeders were facing down instead of up. Give a double check and see if the bleeders are facing up allowing the air to come out.

[Loyaltyisking]

these calipers have bleeders on tops and bottoms. I am checking to see if theirs any markings on either caliper to see if their on the right sides

[Loyaltyisking]

Couldnt see any markings on either caliper?? Could the prop valve be an issue?

[nine lives johnny]

twin MC systems require 3 people to bleed the brakes. you need to bleed the front and rears at the same time.

[Plastik Racer]

Johnny's on to something I didn't even notice you said you have a twin MC system.

[Loyaltyisking]

twin MC systems require 3 people to bleed the brakes. you need to bleed the front and rears at the same time.

So we do one side at a time? Or does it matter? I didnt even think about that...

[79-TA]

You just need to make sure that the pressurized fronts aren't preventing you from getting enough pedal travel to move fluid through the rear master cylinder and caliper. That's my guess anyway. You can either bleed front and rear at once, or find a way to detach the pedal from the front master cylinder so it only operates the one for the rear.

[Motorcitydak]

Can you gravity bleed this first then use a power bleeder in the reservoir? Or use one that sucks fluid out or pushed it up thru the bleeder? You say there is fluid at the prop valve, did you undo the fitting after the prop valve to see if fluid flows there too? Everything in the system new? Old rubber lines are known to swell and completely block off flow thru them

[MonzaRacer]

Here is my secret weapon as a tech I try to reverse bleed unless I have a pressure bleeder around. This company gave me a free unit for the use of my image and email bragging about their products. I have one of originals a second I bought back in 03 or 04 and the new one I got in 2010. Awesome tool. Had buy at my new job, the counter guy, he needed to bleed his dads clutch. He had worked 3 or 4 nights no luck, and in 5 to 10 minutes my Phoenix Injector and its done. Even if you only get the cheap one, its a great investment.
http://www.brakebleeder.com/bleeding-brakes/

[oestek]

Here's a quick vid of how we do single masters, but the pump from the rear first trick should apply..

http://v8tvshow.com/content/view/1343/45/

[Loyaltyisking]

Can you gravity bleed this first then use a power bleeder in the reservoir? Or use one that sucks fluid out or pushed it up thru the bleeder? You say there is fluid at the prop valve, did you undo the fitting after the prop valve to see if fluid flows there too? Everything in the system new? Old rubber lines are known to swell and completely block off flow thru them


So I checked to see if it was getting any fluid out of the prop valve... And nothing. Everything is new. Inna couple hours I will have a couple homies coome thru and help me bleed the fronts and rears at the same time. I will know then if that was all it was.

[David Pozzi]

Check that the rear master cyl piston is fully returning so it can uncover the replenishment port.

[scemeca]

i don't know if this will help but i had the same problem but my problem was in the rear calipers the way they were mounted they were holding air in the top of the caliper i had to unbolt the caliper and hold it upright on the rotor and bleed it that way i am not sure how yours are mounted i hope this helps http://www.getdiscbrakes.com/tech-center/support-videos.aspx here is the web site that i found that worked for me at around the 2 minute mark of the vedio it show how to bleed the calipers

[Loyaltyisking]

So i got a pressure bleeder.. Watched the videos yall posted. Imma try to reposition the caliper today. Hooe fully i get this figured out today. Thanks for all the help. I will post later and shoot an update

[LS6 Tommy]

Not to be insulting, but is the prop valve in the open position?

Tommy

[Loyaltyisking]

So i have tried a few of the things yall mentioned.. I can now bleed the calipers... BUT the rotors dont lock up. And when i try to bleed the brakes some more (possibly help get more fluid in the calipers?) they actually go dry. I am monitoring the fluid in the master, and its topped off. Its almost as if the rears are not getting enough pressure? Its been weeks and i have been trying all kinds of crap.. I been busy with other work so when i get time i mess with them, but still my issues remain unresloved.......... Help. Please. SOS. Im dying here! Jk, but really any and all ideas are appreciated!

[Loyaltyisking]

Not to be insulting, but is the prop valve in the open position?

Tommy
I removed the prop justbto make sure i wasnt having any restrictions in the line

[LS6 Tommy]

You may need a smaller diameter rear master...

Tommy