Wont Brake

[..Adz..]

I fitted new disks and pads to my cally today.
And now the brake pedal is really spongey, can push the pedal all the way to the floor and it hardley brakes.

But when i pushed the piston in i didnt open the bleed nipple so there shouldnt
be any air in the system.

so whats wrong with it?

[Rusty_CallyT]

might have stuffed the seals in the MC [img]/sad.gif[/img]

[..Adz..]

Bugger!!!

How easy is that to sort out?

Will i need a new MC or can i just get new seals?

Cheers

[Rusty_CallyT]

tbh i dont know, iv just heard that sometimes when you return the piston in the caliper it can stuff the seals, usually if you have done it too quick or sommit, have heard of people opening the bleed nipple when pressing the pistons to prevent it.

It might be worth trying to bleed the brakes to see if that helps at all before messing with the MC

[..Adz..]

Ok mate cheers for the info

Will just ave to bleed the system n see if tyhat works

[Stupink]

be carefull if the seal in the MC is gone, then bleeding the brake will make it worse and you'll loose all brakes(assuming you can drive it at all as it is).

Can you pump up pressure at all if you keep pumping the pedel?? if you can its not MC if you can't its MC.. its easy to cahnge, two pipes, and a couple of nuts holding it to the vac servo. you'll need to bleed the brakes after.

[Rusty_CallyT]

use the 2 man pump brake pedal method, the pressure bleed kits are uesless

edit: ah hah a man that knows.. nice one stu

[..Adz..]

yer i can build up pressure when the engine is off after pumping a few times
but as soon as you start her up the pressure goes and you can litterally push the pedal to the floor.

I took it out for a drive and didnt really want to go past 30mph cause the brakes were that s*it.

[Stupink]

Sorry, i wasn't that clear, the pressure needs to be high up in the pedel movement, near the top. if it is there, then you just need to bleed it will probably be ok.. make sure you let the pedel back *slowly* while bleeding.
if the pedel only goes hard half way down or less then the MC seal is fuggered.

[..Adz..]

Ok will ave a lookie in the morning

No doubt i will back here 2morra :frown:

[Phantom]

when you forced the piston back did you lose any fluid?

[Rusty_CallyT]

its when you force the pistons back the reverse pressure can sometimes do the seals in on the MC, its not unheard of