ok this is a real hazard that i have yet to fix.

say im at a stop light, i have my foot on the brake completely stopped. then before i know it, im rolling either forward to back and my brake pedal slowly sinks to the floor depending on the amount of pressure im giving it.

one i left my foot all the way up, press back down, its normal again. i have to have the pedal compressed for about 15 seconds then it sinks down and i start rolling.

im not leaking any fluid, im topped off on fluid. only thing i can think is air bubbles.

any thoughts?

 

Master cylinder has a seal leak. It won't leak fluid externally.

 

+1

 

ahhhhh master cylinder seal...is that an actual gasket or what?

 

rubber seal.replace master cylinder.dont cheap out on something important like that.

 

oh yea seriously. i'll go to pick a part sometime probably this weekend and see if i can strip one. i'll just get the whole assembly, well not the resevoir.

 

Don't bother with pick-a-part.
It's your brakes and it's not worth it using junk car parts for your safety.

I believe a rebuild from a autoparts store will run you about $50 and will come with bench bleeding kit and instructions.

 

Yeah the master cylinder isnt that expensive..

http://www.autozone.com/N,14400007//...eResultSet.htm