Question about 2003 Ford Windstar

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Brake fluid leak

I have a 2003 ford winstar and I have brake fluid leaking between the Master cyc. and the brake booster. I made sure the two units were tight but to no avail. Can you tell me what is causing this? Thank You

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There is Supposed to be a Gasket Between the Booster and Master Cylinder. If this Gasket is Gone it will leak like this. If it is Still There, You may need a New Master Cylinder or Booster Depending on what you find when you get it Opened up. Please Rate My Response! Thanks!

Posted on Feb 06, 2009

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Your master cylinder has a seal where the plunger goes into it. It is leaking fluid into the brake booster. There is no fluid seal between the 2 units so tightening it will not help. You should replace it ASAP. If the fluid sits in the booster too long, it will cause the rubber inside to swell and break. That will cause it to leak vacuum. If that happens, you'll be replacing the master cylinder and the booster.

Posted on Feb 06, 2009

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Your master cylinder rear plunger seal is faulty you must either purchase rebuild kit or have it rebuilt but usually its just better to purchase a new master cylinder or a remanned one is usually cheaper, I would not recommend buying or trying a used one with brakes, ya just dont want to skimp when it comes to brakes ya know? but I can recommend a good place to get a good price.....ebay! if not call these guys no sales tax and will beat out most parts stores Peach street auto 18003652341

Posted on Feb 06, 2009

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Hi it sounds like your master cylnder has failed and starting to leak at the rear seal.it will soon get worse. and it will eat ant paint it sits on for a lone period of time.i recomend to replace it.

Posted on Feb 06, 2009

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clifford224_88.jpg

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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!

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