Hi there, after having my Octavia estate come home from the MOT station requiring new rear brake pipe assemblies & a new front to OSR pipe, I set about replacing including making up the new pipe.

Bleeding took a while & in the end I had to get a pressure bleed system as the kids were getting fed up pumping the pedal!

I now have good firm pedal but the pressure is staying on, all 4 wheels are locked solid

I have had the master cylinder off & checked over by a mechanic but he could find no problem.

Getting beyond funny as without the car I have to get the bus & for a 7:30 start I have to get the 5:45 bus into town :(

The only thing that would keep all the brakes firmly ON would be the brake fluid pressure release mechanism in the master-cylinder, not releasing the pressure from the brakes, back into the master-cylinder...

Check pedal attachment to master brake-cylinder for correct positioning.

I thought bleeding by pumping the pedal was very bad for VAG cars as it will wreck the seals in the master cylinder?

The only thing that would keep all the brakes firmly ON would be the brake fluid pressure release mechanism in the master-cylinder, not releasing the pressure from the brakes, back into the master-cylinder...

Check pedal attachment to master brake-cylinder for correct positioning.

I have tried pulling the master cylinder away from the servo as a way to check this is not happening, No difference

I have even tried pulling the fuse for the ABS/ESP but still my brakes are still locked solid, the system is getting a good pressure test anyway 

not been using mole grips to seal off flexible pipes??

Update

went back to basics, I managed to get fronts moving readily enough, just the surface rust from sitting idle for a few days impeding motion,

the backs on the other hand not so much.

nemesis thy name is oxidation

removed OSR calliper & found the pads were sticking due to rust under the slider plates, also having a close look at the calliper it is quite a bad way, aluminium is not a metal, it's a fungus

looks like a pair of callipers is on tomorrows shopping list 

If you bled the brakes by pumping the pedal you can smash the actuator rod through a metal plate at the back of the servo, which locks the brakes on because the rod can't return.

I now know of 4 cars that have had the same problem, mine included.

 

Unfortunately the only way to solve it is a new servo, they're not cheap and an absolute bi**h to change.

If you bled the brakes by pumping the pedal you can smash the actuator rod through a metal plate at the back of the servo, which locks the brakes on because the rod can't return.

I now know of 4 cars that have had the same problem, mine included.

 

Unfortunately the only way to solve it is a new servo, they're not cheap and an absolute bi**h to change.

this would appear to be the problem, I am now going away to blub like a baby :(