I am having brake bleeding problems and need some HAMB help. I have a 49 Merc and did the GM A body ch***is swap and used a 1972 buick skylark ch***is. I used every part of the Buick skylark braking system in my car thinking it would keep the braking system simple. I have also replaced all hydraulic parts wheel cylinders and master clinders. I can bench bleed the master cylinder then put it on the car and then try bleeding the brakes and get nothing. I then disconnect the line to the master cylinder and it just blows air. The only thing I have changed is I had to byp***ed the distruibution block for the rear line due to a leek. I am thinking maybe the distribution block has a residual valve built in it but dont really know all I have found says its just a basic connection for distribution of the fluid. I have attached a image showing how I have the system conneted hoping you experts can give me pointers on getting my brake system working.
the old fashion way one one on the pedal pushing down while the other is at the wheel cylinder opening and closing the bleeder.
also that is a proportioning valve that regulates pressure between front and back brakes if its not pluged where u byp***ed it i dont think u can bleed the system . put it back the way its suspose to be it needs to be in there.
correct no fluid comming out of wheel clinder in the rear, pump all day have blown lines out making sure they are clear. This is not my first brake system and never had this problem. it just seam that the master clylinger does not stay blead once connected to the brake system. the master cylinger is at an angle when i mounted it to the fire wall dont know if that contributs to it not bleading. I just dont understand what i am doing wrong.
see if u can borrow a mytee vac which is a small pump that pulls the fluid to the wheel cylinder. the work great. always start at the furtherest from master
Ok I will reconnect the distribution block maybe I can get an adapter to help correct the leak I have on it. I had to make a new line to connect to the distribution block and it just did not seam to seal up so that is why I byp***ed it. I will go to the parts store and see if they have a threaded adapter to go from the 1/4" line standard fitting to larger fitting the distribution block reqires. I hope this might help I don't know what else might be the problem.
I can get fluid to the fronts just not the back and I see harbor frieght sells a vac pump for brakes maybe I will buy it and try it.
just remembered years ago i had a brake problem on a new system like urs turned out the new master cylinder was the problem had fluid at one end but not the other and it seemed to work when bleed on the bench.....Dave
Jalopy Kid just had the exact same problem last week. Brand new master cylinder couldn't get the brakes bled and as soon as he swapped it out for a different one worked fine. New does not equate to good anymore.
This is the second master cylinder I have got, the first one from the parts store wouldnt even bench bleed. maybe this one is bad too. i may have to get one from a different place because I am having no luck with the place I am going
I would try connecting the lines in the old configuration, despite the leak, and see if the rear brakes show fluid. If not, then the problem is probably in the MC. If they do show fluid only when connected to the distribution block, then obviously the line connections are not as simple as they appear.
you have a leak that needs to be fixed first put the brake system back how it was stock the proporting valve is part of this system when you put your foot on the brake fluid comes out each time you let off the brake it draws in air thats why your brakes wont bleed
Don't forget that the distribution block has a "bleed" valve on the back. You need to depress it, then bleed the back.
I finally got it to bleed, i put it back the way it was then used a vacuum bleeder to each connection and finally got it to bleed what a pain in the ****. Thanks for the help
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