brake bleeding issue

[kendrick]

I had to replace my front calipers and blead the system. the rears I had changed out the bleader valves the system had completely drained. I have gotten the front 2 to have fluid in them. the rear left seems to drain near normal. the rear right if you open it and let sit for a while a minimal ammount of fluid will drain. the left is pretty steady. any thoughts as to what would be going on?

[speedy25]

Typically its because the bleeder is blocked from rust or dirt.

Are you just letting gravity do the work?

-SP

[kendrick]

no I replaced the rear bleader valves with new ones due to being old. even with the new ones it is the same way. I have tried pumping with the valve open same result. the left side works more or less normally. It wouldent suprise me though if there is a buildup inside he chamber they are the original rear parts on that side. the left side had a fair ammount of work done to it due to an accident so those parts may not be original.

coworker suggested today to see about using a pipe cleaner or somthing to clear the opening to the chamber as well.

[Yodadex]

The way I manually do it is I have someone sit inside the driver side have do the following:

1. Press on the brake while the valve is open and keep it press until the valve is close (dont just keep pumping the pedal while the valve is open in the beginning because the fluid just goes back and forth.)
2. release pedal so new fluid is sucked in the line while the valve is closed.
3. continue the process until you no long have to press pedal and close valve.

make sure to keep an eye on the reservoir level

[mobiless2]

The left is closer to Master Cylinder so it will bleed faster than right. Less resistance.

It's a two man job.

If you don't want a mess, attach a 1/4" hose to bleeder into a water bottle with 1" of brake fluid, submerge hose in clean fluid.

Have someone pump brake pedal 5 times and Hold pedal, open bleeder valve, person inside rides pedal to floor, close bleeder. Repeat 3-5 times, until no air bubbles appear.

Do front first, then rear. Keep an eye on Master Cylinder do not let it go empty.

[speedy25]

Guys- I wouldnt have believed this if I didnt experience it firsthand this week. My old van has had the front brake hoses replaced before. They are a few years old, but show no signs of wear or weatherization. I was having trouble with the fronts and went to work on it. Final outcome was.......

The brake hoses were CLOGGED! My guess is the "chinese" or new formulations degrade on the inside badly. One was totally clogged and the other was partially. When I replaced the hoses bleeding was quick and easy.

Dont rule out that the rubber hoses may need replacing.

-SP

[Dave's]

Unless something has changed, I believe you always start with the brake farthest from the master cylinder. This has traditionally meant right rear, left rear, right front, left front, assuming the master cylinder is located under the hood on the driver's side. However, with dual reservoir master cylinders I must admit I don't know if it matters front to rear so much.