Long story short, I replaced all wheel cylinders, brake hoses and master cylinder recently. Had good brake pedal and things seemed to be going fine. Over the past two days I’ve noticed the pedal start to feel soft at stop lights, it ever so softly loses pressure. I’ve rechecked all the fittings and found everything to be dry all the way around. I rechecked the masters cylinder rubber boot and sure enough there was some fluid, not a lot but it was wet. To my understanding, it should always be dry (please correct me if I’m wrong). Here’s my frustration, this will be the third master cylinder in two years. They are the cheap one’s, maybe 25 bucks at the local parts store. The warrantee has covered the replacements but they should last longer than that! Does anybody have recommendations for a “better” OEM style brake master cylinder? I guess you pay for what you get….. (72 small six, non-power drum brakes)
I'm talking the plunger seal going bad prematurely, typically you can tell it's gone bad because there will be fluid under the rubber shaft boot. To my knowledge that area should be dry as a bone under normal operating conditions.
