Brake Master Cylinder
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Joined: Sep 2001
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From: Newport News Va
Brake Master Cylinder
Hello all,
I have an 89, and I'm having problems w/ the brake master cylinder. I recently refilled the resevoir to the front of the car, and after five days or so of driving, the fluid migrates to the resevoir toward the rear of the car...in other words, the front resevoir drains to nothing, and the rear resevoir is filled to the top of the cap, way above the max line. Anyone know why it's doing this, and what I need to do to fix it?
Thanks in advance.
I have an 89, and I'm having problems w/ the brake master cylinder. I recently refilled the resevoir to the front of the car, and after five days or so of driving, the fluid migrates to the resevoir toward the rear of the car...in other words, the front resevoir drains to nothing, and the rear resevoir is filled to the top of the cap, way above the max line. Anyone know why it's doing this, and what I need to do to fix it?
Thanks in advance.
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Originally Posted by WhiskeyPapa
Hello all,
I have an 89, and I'm having problems w/ the brake master cylinder. I recently refilled the resevoir to the front of the car, and after five days or so of driving, the fluid migrates to the resevoir toward the rear of the car...in other words, the front resevoir drains to nothing, and the rear resevoir is filled to the top of the cap, way above the max line. Anyone know why it's doing this, and what I need to do to fix it?
Thanks in advance.
I have an 89, and I'm having problems w/ the brake master cylinder. I recently refilled the resevoir to the front of the car, and after five days or so of driving, the fluid migrates to the resevoir toward the rear of the car...in other words, the front resevoir drains to nothing, and the rear resevoir is filled to the top of the cap, way above the max line. Anyone know why it's doing this, and what I need to do to fix it?
Thanks in advance.
Sounds like wear in the bore of the cylinder, but question(s)How do the brakes feel?
Doesn't the fluid from the rear reservoir overflow?
Are you sure it is migrating into the rear reservoir and not going into the vacuum booster? Or leaking somewhere else?
seeya
Le Mans Master
Joined: May 2005
Posts: 7,340
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From: Central Maryland
Originally Posted by 65Z01
It sounds like it's time to replace the MC.
Sounds like fluid is bypassing the piston seal and working its way into the other chamber. I'd say a new MC is strongly recommended at this point. Best to catch it (hopefully) before it dumps fluid into the booster -- or leads to hydraulic failure.Be well,
SJW
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Joined: Sep 2002
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From: OBAMA IS HITLER
i agree with the above remarks. it is a classic problem in the C4 with dual reservoirs. most definitely an internal leak between the 2 cylinders. your brakes are no doubt somewhat weak because of it.
