Question about 1996 Dodge Dakota

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Brake fluid leaking in front below the master cylinder, but not at the wheel

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Your master cylinder is bad

Posted on Jul 28, 2010

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2005 gmc envoy front pads won't release put on 2 new calipers,2 new brake hoses, new rotors & pads. can you help?


Check ur master cilinder , a way to know if your wheels are free, jack it up turn the wheel by hand if not realese the bleeder on top of the caliper and try again if it is free probably u need to replace master cil.

Dec 02, 2014 | 2005 GMC Envoy

1 Answer

Brake fluid low


You obviously have a leak . Check master cylinder , rear wheel cylinders and front calipers for a leak and repair . You shouldn't have to add fluid to a closed system such as this . But yes , fill master cylinder to full mark .

Mar 16, 2014 | 2004 Mercury Mountaineer

2 Answers

Losing brake fluid with no leak


It's a sealed system, so it's got to be going somewhere, leaking somewhere (or boiling off from severe braking operations over and over). Since you likely haven't experienced extreme braking, it must be leaking somewhere.
You will have to trace all your brake lines from the master cylinder to each wheel to check for any sign of leaking. Front calipers are easy to spot leaks when they leak. If you have drum brakes on the rear, you may need to pull off the drum to check the wheel brake cylinders. Peel back the rubber boot on each end of the wheel cylinder and look for any fluid leaks there.
Another place to check is at the back of the master cylinder. If a seal is bad there, it has been known to leak fluid inside the car, under the dash. Feel around the carpet under and behind the brake pedal for any wetness. If you find brake fluid there, you will need the master cylinder replaced or rebuilt.
Hope you find the problem. Don't forget to check the ABS system and brake lines, too.

Mar 28, 2012 | 2008 Pontiac Grand Prix

4 Answers

My 2001 neon's brake light just came on yesterday and will not go off. The brake pedal also goes almost completely to the floor, have to leave a lot of room to stop. Prior to the light coming on, I...


Check the fluid level in the brake resivior. It sounds like you have a leak. Check all the brakes and look for ruptured lines or a leaking caliper. If no leaks at the wheels and along the brake lines the issue would be the master cylinder or hydo boost unit.

Mar 05, 2011 | 2001 Plymouth Neon

1 Answer

My brakes had began to fail. I tried adding brake fluid, they got worse. So I took it in for repair to a local shop, they said I needed a new master cylinder and added one. I had been driving my car for...


1- New master cylinders could also fail, possibly due to bad quality replacement parts or maybe even just a factory fault on a good quality master cylinder.

2- If you had blown a rear wheel cylinder, you most deffinatly should still have had a form of front brakes. the reason for this is as follows... For this very saftey meassure manufactures design the container for the brake fluid supplying the master cylinder in two internally, so this would mean that if you where to drain all the brake fluid through the rear wheel cylinders an acceptable amount of brake fluid should still remain within the one compartment of the reservoir for the front brakes to still opperate.

3- Leaking rear wheel cylinders should have been noticed by the technician who installed the master cylinder, the reason for this is because the brake fluid would have had to be bled through the system at each wheel. even though it would have been performed from the back of the wheel one would expect the technician to notice the brake fluid dripping out behind the brake drum.

I hope the above is of assistance to you.

Regards.

Feb 21, 2011 | 2001 Ford Taurus

1 Answer

My brake light has gone on and stayed on twice in the past three months. When I take it to the garage, they add brake fluid. Why does the car seem to be losing brake fluid?


well if you are losing fluid you definatly have a leak as brake fluid is not a "topping off fluid". you could have a leaking master cylinder either externaly which can be seen on brake booster or it can be leaking into the brake booster filling it with fluid. other than that you also may be leaking from your brake hoses(one hose at each wheel), calipers(front wheels and rear if all wheel disc brakes), wheel cylinders (if you have rear drum brakes), or metal brake lines due to rust and corrosoin (run from master cylinder to each brake hose). please rate 4 thumbs if helpful.

Dec 31, 2010 | Pontiac Vibe Cars & Trucks

1 Answer

If i replaced wheel cyinders an front breaks, still my brakes go all the way down..What could be the problem?


The Master Cylinder controls the pressure...if you just changed the brakes...the pedal will go to the floor until you pump them up...be sure you have the brake fluid reservoir full...the only other problem would be a brake fluid leak between the master cylinder and the front brake calipers...you will see the fluid leaking while someone pumps the brake for you...my bet from your description is the master cylinder is bad...no visual leaks or other symptoms...:)

Nov 26, 2010 | 1993 Dodge Caravan

1 Answer

Install new brake pads and rotors all 4 wheels. Replaced front 2 calipers. Bled brakes. New clean fluid coming out. pedal is still soft and goes to floor. 200 Seebring.


Are you losing any Brake Fluid? Is it visible anywhere at the four wheels? Is it visible anywhere else?
The Master Cylinder may be defective. When you bled the Brakes did you maintain proper Brake Fluid Level in the Master Cylinder? If you didn't: and air entered into the Master Cylinder there maybe air within in the system in the Master Cylinder. You can bleed the Master Cylinder by removing the brake lines, adding more fluid, pumping the brakes, bleeding the air out of the system.
Are you losing Brake Fluid and can't find a noticeable leak? Then there is a good posibility that the rear seal in the Master Cylinder is leaking and the Fluid is going into the Brake Booster - which is the large wheel shaped drum located on the fire wall. In this case both the Brake Booster and the Master Cylinder will have to be removed and replaced. The Booster contains seals that Brake Fluid is very caustic to and will ruin these seals- causing future failures.
If no Brake Fluid is lost, no leak found: Check the Brake Booster Vacuum Advance. This should be connected to the outside of the Booster, attached to a hose, with the hose going to the engine. Check to see if this is working properly. Replace if needed.

Dec 31, 2009 | 2002 Chrysler Sebring

1 Answer

Experienceing loss of power to brakes


1. What is the Brake Fluid Level?
2. Are you losing any Brake fluid at all? Are there any puddles or noticeable wetness on the ground or on the tires/wheels? With vehicle parked, the reservoir filled (overfilled), and engine running: pump the brakes and check on the ground and back sides (inside portions) of the wheels. Look for any brake fluid leaks.
3. Leaks from Calipers usually means a leak from the caliper piston. The rubber seals will be wet.
Leaks from Drums usually means a leak from the wheel cylinder.
4. In any case of leaks from the wheels - replace the calliper OR wheel cylinder.
For caliper leaks: change the brake pads, and clean the rotors with brake cleaner.
For drum leaks: clean the drum and brake hardware with brake cleaner, and replace the shoes.
5. If no leak is detected from the wheel area's: check under the Master Cylinder for wetness indicating a possible leak.
6. If no leak can be found: you MAY have a rear seal leak in the Master Cylinder which is pumping Brake Fluid into the Brake Booster (that large disk looking thing attached to the fire wall, attached to the Master Cylinder in front).
a. Use a large drip/catch pan under the Van in the area on the Master Cylinder.
b. Disconnect the brake lines from the Master Cylinder using a flair wrench.
c. Remove the two nuts (12 or 13mm?) attaching the Master Cylinder to the Brake Booster. If you have been using a lot of fluid, and have found no leaks, here is a good possibilty that all that brake fluid has collected in the Booster; so when you detach the Master Cylinder from the Brake Booster, all that fluid will come rushing out!
7. If there is Brake Fluid inside the Brake Booster: there is no cleaning that out. Brake Fluid is very caustic to the seals inside the Booster and should be replaced.
8. Of course the Master Cylinder will also have to be replaced.
9. After replacing the Master Cylinder/Brake Booster - make sure you get all that spilled brake fluid off the engine compartment area parts! I use a brake cleaner, then mild soap and then water to rinse. Clean any Brake Fluid off Paint imediatley as it will quickly dissolves finishes and paint.
10. If no leak is detected and the Booster is clear, there may be problems with the Booster One-Way Valve. This is attached to the outside of the Booster and has a hose from an "advance" connected to it. This maybe malfunctioning where you are losing power. Replace this first before deciding to replace the whole booster (in cases of NON-LEAKS ONLY). If that did not work, there may be inner seals inside the Booster that have failed. That means a new Booster.
11. In any of the above cases: Make sure you bleed the Master Cylinder correctly and bleed the brakes (at each affected wheel) correctly. Any air in the brake lines will decrease your braking proficiency or could result in brake failure.

Let me know if this helped or if you have any additional information or questions. Feel free to contact me at FixYa.com!

Dec 10, 2009 | 1999 Dodge Caravan

3 Answers

I have a slow brake fluid loss. I think it may from the master cylinder. Are there any seals in the lines that go into the master cylinder unit.


no they are inverted flare fittings no seals check all lines and calipers/wheel cylinders if all are dry remove the vacuum hose from the booster if there is brake fluid in the hose the master cylinder is bad

Sep 24, 2009 | 2002 Hyundai Santa Fe

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