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How do you fix a master cyclinder from leaking brake fuild?

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  • 155 Answers

Loosen it from the line take it out and and holding it upside down with the piston out you will see a circlip on top take the circlip of and inside it there is a kit you will have to buy

Posted on Dec 04, 2012

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Posted on Jan 02, 2017

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SOURCE: I just put new calipers

Did u bleed the master cylinder before u installed it? If not, you'll have to also bleed the rear brakes. starting w/ the bleeder the farthest away, to next greatest distance,etc til u get to the closest bleeder.
If u did bleed the master cyl. before installation, I'm wondering if u did the following:
have someone pump the brakes (3 times, don't mash the pedal to the floor, just gentle push no more than half way down 3 times, while holding pedal half way down 3rd pump, open bleeder, when fluid or air slows coming out, close bleeder, and repeat, until only clean fluid flows. And of course, don't let the fluid get too low in the master cyl, or you will **** in air and have to start all over. Let me know how you do. countrycurt0

Posted on Sep 28, 2008

mick-40
  • 94 Answers

SOURCE: leak from master cyclinder

Hi sgraham5,this is a pretty simple fix really,and not very expensive,do you plan to do the repair yourself or are you going to take it in? the diaphragm between the cyl and booster is shot and needs to be replaced you will have to take off the master cylinder. If you do this yourself buy a haynes or chilton manual for your car (which is great to have anyway) and you will have no problems,because this is related to your brakes you must make sure it is done right.If you like I can explain this in detail to you via chat as there are a few critical issues here let me know and good luck to you friend.

Posted on Nov 13, 2008

  • 341 Answers

SOURCE: Nov. 94 Grand Cherokee Jeep no back brakes

I bet you still have air back there. If you didn't bleed the system after the master you need to do that. Bench bleeding a master doesn't always work.Also badly out of adjustment rear brakes can act the same way.

Posted on Nov 26, 2008

  • 11 Answers

SOURCE: hooking up the brake lines to the master cyclinder

well that is easy the front line goes in the front and the raer to the rear

Posted on Mar 27, 2009

  • 60 Answers

SOURCE: replaced brakes and accord brake pedal goes

After replaicing braking parts need blow out air from the breaking line.

Posted on Aug 08, 2009

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low brake fuild or brake fuild leaking
check the brake master cylinder pump brake fuild lever in the engine room .

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Why do brakes go to floor but still have light pressure?


It sounds like you have air in your brake lines. This is usually caused by a very low brake fluid in the master cyclinder.
To fix this problem fill up the master cyclinder with brake fluid and bleed the front wheel brake cyclinders until the air bubbles are removed. Keep the master cyclinder topped up with brake fluid. Then bleed the rear wheel brake cyclinders until the air bubbles are removed. Don't forget to top up the brake fluid in the master cyclinder.

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Brakes on rear passenger side it leaking brake fluid..what is the part call to get it fixed. my brother said it was the master cyclinder but now he believes it is like a brake wheel cyclinder


if you have drum brakes on the rear of the car and the leak is at the back of the car the part is called a wheel cylinder if the leak is coming from inside the brake drum.

May 05, 2011 | Buick Riviera Cars & Trucks

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I just replaced my master cylinder on my 1994 ford thunderbird LX with a 4.6L V8. But my brake pedal is still going down to the floor board. What could be the cause of that?


you've bled the lines from back to front, and bled the master cylinder/ It sounds like air in the lines, so you should be able to get streams of fluid with no air at all bleeder screws-start from the furthest away from the master cylinder, to the closest, then do the master cylinder. If that doesn't work, you must have a broken line or a leaking caliper or wheel cylinder.

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Brake pedal very soft and mushy. Brake warning light comes on and stays on. Is this a master cyclinder failure?


YEP MASTER CYLINDER FAULTY. ALSO LOOK FOR A LEAKING BRAKES LINES, LEAKING BRAKE CALIPERS OR WHEEL CYLINDERS IF YOU FIND DRY MASTER CYLINDER.

Dec 31, 2010 | Geo Prizm Cars & Trucks

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1996 Oldsmobile Cutlass Ciera - brakes


OK, if the ABS light is on one should scan it with an OBD-II ABS Brake Scan tool like Actron's ($99 to $116 on Amazon.com).

This will likely tell you which wheel has a bad speed sensor.

There could be an internal fluid leak on the master cylinder which needs to be addressed before it's safe to drive.

It would be nice to have the ABS portion of your braking system fixed at the same time.

You may be looking at a new ABS Brake Wheel Speed Sensor which is sometimes put into the hub permanently (requiring a new hub).

Jul 27, 2010 | 1996 Oldsmobile Cutlass Ciera

3 Answers

Brake pedal goes down while sitting at light


bad wheel cyclinders, or master cyclinder, possiable fluid leak

Apr 29, 2009 | 1997 GMC Jimmy

2 Answers

Brakes


Step1
If you had a brake job you might have air in the system that needs bleed out.
Crack open the bleeder on the caliper and watch the brake fuild come out steadly and close it and don't pump the pedal. Do this to each side this is called bench bleeding and watch the brake fulid level while you are doing this add fuild as you bleed each side.


Step2
Also sounds like a leaking line check under the car for a leaking brake line. Next would be a master cylinder problem. But more than likely a brake line might be rusted up and leaking, sooner or later you will not be able to stop. If its a leaking line it will leak all the fuild out of the master cylinder. You can replace the line and use the bleeding procedure in step one.

Apr 19, 2009 | 1998 Lincoln Mark VIII

1 Answer

Brake low pedal


Many vechicals required maintenance to the brakes. Check your fuilds, usually pedel to floor means lack of fluids and also air in your break lines. Try cleaning grease your pins get the condition up to par. While you have the wheels off have a friend pump the brakes pedal and leave pedal to the floor Bleed your brake line one at a time there is a screw on the caliper release (usually on japan car 10mm screw) and tighten back up repeat proccess two times to brakes all around. Make you should you have brake fuild on hand buy the big bottle DOT3. If this process doesn't help than your would need to replace the master cyclinder, and booster

Mar 01, 2009 | 1998 Lexus Gs 400

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