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Old 06-30-2009, 12:40 PM
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bleeding breaks

Any hints? Me and a buddy of mine tried to bleed the breaks on my car, but there seems to be NO break fluid coming out... at all after pumping the pedal until its hard, holding it, and opening the valve.

I am more then sure that air is the issue. The pedal is soft, and my breaks barely work. And then they would perform just fine for no apparent reason.

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Old 06-30-2009, 12:59 PM
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When you open the bleeder and nothing comes out what it is doing is expelling air.

Get a glass jar and put 2" of brake fluid in the bottom. Put a piece of vacum line on the nipple and put the other end into the brake fluid... now pump the pedal and release the brake nipple and you will see bubbles of air escaping. Once the bubbles quit close the nipple valve. Make certain you keep the master cylinder full and start at the wheel furthest from the master cylinder...

Let us know how it goes and good luck!

-=Fred=-
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Old 06-30-2009, 01:11 PM
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If the brake piston is froze up, the bleeder won't have any effect- it'll just open and close w/o anything coming out at all.

If that is the case w/a rear brake cylinder, go to the other side or to a front brake and see if it will bleed.

You're usually supposed to start farthest from the master and work your way towards it.
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Old 06-30-2009, 02:11 PM
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Start at the rear with the brake FURTHEST from the master cylinder and work your way around the brake cylinders. Fill the master cylinder up and put the lid on too. Keep steady pressure on the pedal, do let go until the nipple is closed.
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Old 06-30-2009, 02:13 PM
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thanks guys. one more question - do I need to do it one at a time, or both rears and then both fronts is ok?
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Old 06-30-2009, 02:15 PM
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Quote:
Originally Posted by KoTT
thanks guys. one more question - do I need to do it one at a time, or both rears and then both fronts is ok?
One at a time.
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Old 06-30-2009, 03:58 PM
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What type car are you working on. There are different brake systems with different bleeding proceedures. Need to know this to know what bleeding pattern you need to be useing. Cole
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Old 06-30-2009, 04:03 PM
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In the past the OP was working on a '95 Mustang.
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Old 06-30-2009, 04:04 PM
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Sorry, i must have missed the past, Hummm sometimes i do. Cole
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Old 06-30-2009, 04:10 PM
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yeah, its a 95 mustang. Single MC. Disks on front, drums on back.
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Old 07-01-2009, 09:22 AM
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You stated that sometimes they work fine. This sounds more like a master cylinder issue.

When you apply pressure to the pedal and open the bleeders, are you saying nothing comes out at all. Does the pedal go down at all when the bleeders are opened.
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Old 07-01-2009, 09:23 AM
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Quote:
Originally Posted by cobalt327
If the brake piston is froze up, the bleeder won't have any effect- it'll just open and close w/o anything coming out at all.

If that is the case w/a rear brake cylinder, go to the other side or to a front brake and see if it will bleed.

You're usually supposed to start farthest from the master and work your way towards it.
How will a frozen wheel cylinder keep the fluid from flowing. The fluid will still be able to flow, the pistons just wont move.
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Old 07-01-2009, 10:10 AM
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My bad. Meant if the bleeder orifice was froze up.
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Old 07-01-2009, 01:03 PM
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if the bleeders are open, it drops all the way to the floor with almost no resistance.

I took the car for a drive, and noticed that my front right break didnt work. After taking off the wheel and looking at it, there was a buncha break fluid on the wheel, calliper, and disk. I disconnected the hoses, fixed the leak (the hose from MC to the front right was not properly attached), and now my breaks pretty much dont work at all. The MC ran dam near dry when I drove it.

edit: yes, nothing comes out at all.
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Old 07-01-2009, 01:15 PM
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Quote:
Originally Posted by KoTT
The MC ran dam near dry when I drove it.
edit: yes, nothing comes out at all.
You can start by bench bleeding the master cylinder. This can be done on the car w/o much trouble. Run the temporary lines back up into the reservoir and gently pump the pedal to bleed it.

Fast68 mentioned doing this by covering the ports w/his fingers after the pedal was depressed- if I understood him correctly. Maybe he will elaborate on this method if he reads this.

After the MC is bled, reconnect the lines and proceed to bleed the system normally.
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