18-02-2014, 10:10 AM
If the pedal creeps to the floor under sustained pressure and there's no leaks, replace the MC as a matter of course.
Basically, if the pedal is creeping then either fluid is leaking out of the system or its leaking back past the seals in the MC under pressure. If it was just air in the system, the pedal would be spongy and/or would have a fair bit of dead travel, but shouldn't creep.
Bleeding brakes on old MC's can damage the seals internally and cause issues like you're seeing.
Basically, if the pedal is creeping then either fluid is leaking out of the system or its leaking back past the seals in the MC under pressure. If it was just air in the system, the pedal would be spongy and/or would have a fair bit of dead travel, but shouldn't creep.
Bleeding brakes on old MC's can damage the seals internally and cause issues like you're seeing.
1990 Peugeot 205 GTi 1.9 // 1991 Peugeot 205 GTi 1.9 16v // 1992 Peugeot 205 GTi 1.9 // 1999 Peugeot 306 HDi Estate