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Brake Fluid Spraying Out The Back Of The Brake Booster


thehackmechanic

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I have a good-sized a brake fluid leak in a customer's 2002, leaving puddles and visibly draining the reservoir. I crawled beneath it and had someone pump the pedal while the engine was running with me I looking up, trying not to get brake fluid in my face. When the pedal is pumped, I'm seeing a spray of brake fluid out the back of the brake booster, where the linkage goes in. I am I correct that this is probably a bad seal between the master and the booster, and that the master probably needs to be changed but the booster itself is probably okay?

 

--Rob

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+2...rear seal on the M/C has "turned up its toes" and is peeing into the brake booster.  You might be able to salvage the booster by removing it, draining out all the accumulated fluid and then seeing if it'll hold a vacuum.  However, the fact that fluid is coming out the back side of the booster (the firewall side) indicates that the diaphragm has a hole in it.  

 

Somewhere in the archives there's info on one or more places that rebuild boosters...

 

cheers

mike

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