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brake master cylinder


Avanti7
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I have brake fluid leaking from the master cylinder at the connection point to the booster. Is it possible for fluid to get onto the booster and if so will it ruin the booster?

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Yes, if the rear seals (O-rings) on the master cylinder piston leak, the fluid can be sucked into the booster and attack the bladder. If you are using silicone brake fluid, the booster bladder may not be damaged, but the master cylinder still needs to be repaired/replaced.

 

Edited by WayneC
add'l info
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