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Wrenchbender Ret · 09-20-2013, 10:05 PM

If it is leaking around the cap, the cap could be warped, the gasket damaged or dirty, or thespring needs tightened up. If it is leaking where it is attached to the booster, then the cup in the master cyl is bad. There is no fluid seal between the MC & the booster.
If your pedal is low you have air in the system or the rear brakes need adjusting.

09-20-2013, 10:05 PM	#2
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,229	Re: Master Cylinder leaking? If it is leaking around the cap, the cap could be warped, the gasket damaged or dirty, or thespring needs tightened up. If it is leaking where it is attached to the booster, then the cup in the master cyl is bad. There is no fluid seal between the MC & the booster. If your pedal is low you have air in the system or the rear brakes need adjusting.