help, brakes braking on their own...

[WongFeiHung]

Installed a new master cylinder lasnight...coming back from lunch at work today, I notice the car is braking while I'm driving...get to work, the front rotors are very hot, so I think its just the front calipers are compressed...

Eh? Too much pressure in the lines? Maybe I can just relieve pressure and re bleed...? What would cause that?

Kato

[ledzeppelin240]

Siezed calipers...The pressure is not the problem brakes run from 1000psi to 5500psi. It is most likely siezed calipers...

[WongFeiHung]

The calipers were not siezed before I put the new master cylinder, I think the new master cylinder might not be releasing pressure for some reason...

[ledzeppelin240]

Hmmm, have you checked for any lines that might be bent or crimped? Or it could be a internal MC problem.

[cdlong]

it may not be coming out all the way, if the MC pushrod doesn't retract all the way the opening into the resivor won't open up and the pressure won't equalize like it's supposed to. check the pedal and the booster pushrod. there's a write up around here somewhere on the pushrod thing.