Brake help.

[vrooom]

my cooper s 7.5" cailper leaks from seal.

How tight the bigger seal that sit in cailper (2nd bottom) should be ?

the top rubber seal which sit next to pad, has 2 grooves which faces piston, is that normal? is that the reason its leaks ?

Jay

[Cooperman]

Hello Jay,

The outer seal is just to keep the dirt out. It's the square section inner seal which carries the hydraulic pressure.
If you have a leak of fluid from a cliper you MUST do a complete rebuild with new (stainless steel) pistons and new seals.
Make absolutely sure that everything is absolutely clean before re-assembly.
It's not a difficlut job but the outer dirt seal can be a bit of a b****r to install.
Good luck with this.
Peter

[vrooom]

It had overhaul recently, with new seals, stainless steel pistons. Shall i replace the seal, the piston itself look good, no stratches or anything

Those minis, are pain in the bum!

[Cooperman]

Jay,
That's a bit odd as with new seals and pistons there is usually no problem. I'm a fussy old sod and if it were me I would fit another caliper just to be absolutely safe. I know it's expensive, but then so is a brake failure!!
Maybe the new seal was duff to begin with, or could it have got scored across the seal face during installation? I'm really not sure what else it could be really.

[vrooom]

the fluid leaks like dripping though the seal. and brakes feel really good. wouldnt have thought its leaked.

would have fixed it but shop recon is closed today.

jay