Brakes Problems

[big4x4ride]

I have a 1979 GMC Jimmy, had decent brakes on it last week, i changed out pads on the front, and had no brakes afterwards, when you push the pedal, all you hear is air leakage, btu no fluid leaking anywhere, so I swapped out the booster, and now I still have nothing, pedal just travels to the floor, sound like a master cylinder problem??

 

[divorced]

All you did was change pads? Did you open the system at all?

 

[afroman006]

When I put the new axles in my burb, I bled the brakes as well as they were gonna get but when I first drove it I had zero brake pressure but drove it back and forth in 10 foot increments until I got pressure and then it worked fine.

 

[big4x4ride]

never opened the system, thats what is odd

 

[ntsqd]

Likely had corrosion on a piston or similar and when you re-lined the brakes you pushed the piston past the pits, which tore the seals. Not at all uncommon.

 

[big4x4ride]

new booster, new master cylinder, still cannot build pedal pressure, push teh pedal you still hear air moveing, sounds like coming from booster, about to give up on it and sell the POS