Question about Land Rover Discovery

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Break pedal keeps buildig up until is goes all stiff ... full breaks on. have changed master break cylinder ... problems seems to disappear when loosening bolt connecting to the booster

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The break booster is the most likely cause of the problem.Don't pull it apart as there is a very highly compressed spring inside that may cause serious personal injury.Take it to a break specialist.Brakes are the most important part of the car.

Posted on Aug 01, 2009

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Poor vacuum on the booster

Posted on Aug 01, 2009

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2 Answers

My break pedal goes all the way to the floor . I replaced brake rotors master cylinder, and Break booster. I had to bleed the brake and still pedal still goes to the floor


You still have air in the system.(not bled properly) If you let the Master cylinder drop down to nothing then you need to bench bleed that before bleeding the lines again.

Feb 18, 2016 | Cars & Trucks

2 Answers

My brake pedal slowly losing pressure goes to the floor and then I have to pump it up again


If you break fluid level is correct and your break pedal goes down to the floor means that your master cylinder is going bad and you might loose your breaks completely if not checked or replaced. Your breaking system is down to the last O ring inside the master cylinder, once that rubber O rings goes you will not have any breaks at all. Master cylinders have a number of rubber O rings that work like a plunger or piston that produce pressure within the breaking system. When the first one wears down due to age, your pedal begins to loose break pressure and you have to pump your breaks several times to gain breaking. You are now down to the last rubber O ring and a warning that your master cylinder needs to be checked. You can still use your breaks but only for a few days before the other rubber O ring gives out too. Once both O rings give out you completely loose your breaks.

Apr 12, 2015 | Cars & Trucks

1 Answer

When i press the breaks the breaks pedal goes all the way to the floor


you either have a busted break line or your master cylinder needs to be replaced. check around all wheels for fluid leakage , If no fluid seen check to see if the cylinder is full , If mot fill it and pump the breaks and look again for fluid leakage.

Feb 13, 2013 | 2001 Hyundai Santa Fe

1 Answer

1993 buick regal breaks went


Hi again: I'm almost 100% its your Master Cylinder has gone bad.And needs replaced. Should solve your Problem. After you Change it and have the New one on,You'll need a Couple Quarts of Brake Fluid, Cause you'll have to bled the Air out of the System, and 2 Qts so you can Flush out ALL your Old Brake Fluid its probally contaminated. To Bled Start at the Passenger Rear Wheel, next Drivers rear Wheel, Next Pasengers Front Wheel,And Last Drivers Side Front Wheel. You'll need a Helper for for 2 reasons 1st reason he wil need to push the Brake Pedal to the Floor HOLD it UNTIL you Open Bleeder Valve and leave open until no more Fluid or Air is Coming Out, Then Close it do it again and again,Then Go to the next Wheels as i told you above and repeat the same thing on each wheel but do it in the order i told you above. 2nd Everytime you open the Bleeder Valves and Fluids coming out ,Your Helper needs to Keep checking the MASTER Cylinder and Keep it Full ALL the TIME. or you'll get AIR in the System and the Bleeding will not Work, Without a Full master as you Bleed the Brakes. Continue doing this until you See Cleaner Brake Fluid Coming out ALL 4 Wheels Bleeder Valve. Remember KEPT THE MASTER CYLINDER FULL. AND ONLY have your HELP PUSH the PEDAL down even to the FLOOR DON"T PUMP IT> You'll get a Pedal as soon as you have Continued to Keep Bleeding the System. This should Solve your Problem.

Feb 22, 2012 | 1993 Buick Regal

1 Answer

We changed the pads, rotors, drums and shoes on our 2001 montana, after we were done the break pedal goes to the floor, we were told to change the master cylinder and did,, but it didnt fix the problem,...


After you change brakes you need to bleed air from the brake lines what you need to do is find the bleeder valve its usually rite beside where the brake line goes in the calipers and looks like a grease fitting get someone to pump the brake pedal 3 or 4 times and hold it while someone else loosens the bleeder valve to drain the air out keep the pedal mashed until you get the bleeder valve tightend back up . Do each wheel until fluid comes out check brake fluid while doing this so it doesnt run out. Hope this helps

Jun 03, 2011 | 2001 Pontiac Montana

1 Answer

I have a 2007 dodge 1500 mega cab 4x4, my break pedal goes down to far when i step on the breaks. I installed new rotors and pads it still goes down pass excellerator pedal


You need to bleed your brakes, check for air in the lines making sure that you keep the brake reservoir full. Check for leaks from your master cylinder also.

May 19, 2011 | 2007 Dodge Ram 2500 Mega Cab Laramie

1 Answer

I changed the front pads on my 05 trailblazer i did not have a c clamp so i took the break line off the caliper now when i tried to bleed the breaks with the bolt on the break line i only get a stiff pedal...


Have you checked your Master Cylinder to ensure that it's full of fluid? If it is empty the best way to bleed the brakes in that case would be to add fluid and then break the caliper bleeders loose and let gravity do its thing. Gravity bleeding is the best way to make sure you don't trap air in the brake system. Make sure you keep the master cylinder full of fluid while gravity bleeding. Run approx 2 reservoirs full to make sure that you have no more air in the line! And you should be done.
Also, the vehicle does not need to be running to gravity bleed.
Good luck!

Feb 06, 2011 | 2005 Chevrolet TrailBlazer

1 Answer

I changed the break pad, blead the breaks, and the pedal stil goes to the floor and break system light goes off.


check your master cylinder and booster see if you see a fluid leak if not then take cap off resivior and open bleeder valves just enough to let them bleed out on all four wheels KEEP THE RESIVOIR FULL OF BRAKE FLUID while your doing this .. this procedure should take about 45 min

Sep 18, 2010 | 2003 Chevrolet Silverado 1500

2 Answers

Brake pedal still goes to floor 2000 GMC Jimmy


It's very possible to be the master cylinder, the o-rings on the piston could be worn, letting the fluid seep back through instead of getting full pressure through the lines. Could also be the brake booster.
Try changing the master cylinder first, which is cheaper and easier, and see if there is a difference, you'll need to bleed the brakes again.
To check the booster,
With the engine off, pump the brakes until the pedal is hard, then hold pressure on the brake pedal and listen for air escaping, or the pedal goes slowly to the floor, Do that after the master cylinder has been changed, at least that will be eliminated.

Sep 15, 2009 | 2000 GMC Jimmy

2 Answers

Poor breaks


When you open the breaking system you allow air to enter the break lines and that will cause squishy or weak breaks. You have too "bleed" the air out of the lines now. The way to do this is to have someone help you with this process. They will need to pump the break pedal until the break pedal is stiff and hold pressure on the pedal while you open the valve on the caliper or wheel cylinder(disc or drum) until you have a steady stream of fluid with no air. To ensure you get all the air out you need to start from the passenger rear tire,then driver rear, pass. front, driver front. Make sure you slip one end of a hose over the bleeder valve and the other end in a container so that you don't allow the break fluid to contaminate the new brakes,

Dec 03, 2008 | 1995 Chrysler New Yorker

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