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Leak between vac booster and master cylinder...

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Old May 9, 2011 | 04:10 PM
  #1  
mjb1032's Avatar
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From: Easton, MA
Leak between vac booster and master cylinder...

Is this an easy fix?
There's a brake fluid leak here; Is there an O-ring I can replace?
....anyone?
Thanks
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Old May 9, 2011 | 04:56 PM
  #2  
88racing's Avatar
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From: In the fast lane from LA to Tokyo...
Shouldn't be leaking there....the seals may be going in the master cylinder.....
 
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Old May 10, 2011 | 12:04 PM
  #3  
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From: Indiana
where is the brake fluid leaking exactly?

There is an O-ring on the hub of the master cylinder (inside the booster) but it is there to hold the vacuum in the booster
(ok, technically it holds the air out of the booster)

If you have brake fluid leaking out of the booster then it means you have a booster at least half-full of brake fluid. And it means you have a major vacuum leak, otherwise the air would be sucking in and not letting fluid run out. This is theoretically possible, but it would mean you have been adding tons of fluid to the reservoir to replenish what is leaking into the booster.

Is this the case?

If not, I would assume the brake fluid is coming from elsewhere... probably leaking around the reservoir cap or the reservoir grommets.
 
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Old Oct 27, 2011 | 02:10 AM
  #4  
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From: morton
i just seen mine was leaking to, i believe its leaking because i replaced my front pads and rotors and also removed my right rear to replace the axle seal. so i had to press in three calipers and i believe it just got so full it found the weakest point. so since this happened will i need to replace that oring or just clean it up and watch it??
 
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Old Oct 31, 2011 | 12:19 PM
  #5  
mkosu04's Avatar
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From: Indiana
Originally Posted by acoers
i just seen mine was leaking to, i believe its leaking because i replaced my front pads and rotors and also removed my right rear to replace the axle seal. so i had to press in three calipers and i believe it just got so full it found the weakest point. so since this happened will i need to replace that oring or just clean it up and watch it??
where is it "leaking to"???

Is the reservoir wet? - if thats the case you just pushed too much fluid back and should have siphoned out the reservoir.

If the booster is wet - is it leaking there or is it just wet from the reservoir overflowing?
 
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