Spongy Brake Pedal after fitting new brakes

[ben183]

Hi there,

 

Have just fitted a full set of refurbed calipers, pads, discs, braided lines and a full fluid swap to my MB6 but am now suffering with a very spongy brake pedal. I've bled each corner several times and even made sure theres no air in the ABS unit but there is still a lot of pedal travel and not much braking force.

 

Is it possible there is still air in the system or is this likely a master cylinder problem? It was working fine before the "upgrade".

 

Have seen multiple people with what seems to be the same problem after swapping out various braking components, but nobody has mentioned what the end solution was!

 

Any help/suggestions much appreciated!

 

Ben

[Primo107]

Same size brakes or bigger?

[ben183]

Same size brakes. Very spongy initial pedal which firms up under repeated braking. Has anyone else had problems bleeding these?

[philgor]

They may just need bedding in. I found that when I fitted disks and pads around. 

[m0l0t0v]

Did you do the corners in order? I had the same thing, then re-bled in the proper order and no more spongyness. Though I did bleed them initially in the proper order, just not well enough it seems!

[ben183]

Eventually it took a couple of new rear calipers and now things are working fine!