Stan 24v Posted October 2, 2012 Report Share Posted October 2, 2012 Did this a couple of years ago but never got around to doing the write up, oops You dont need to change the piston as its just a push in type, so no screw portion like VAG calipers. You need a refurb kit from BMW, around £20 iirc. Basically you do the following: Clamp the brake pipe with some cloth and mole grips. Remove the caliper. Use a hand/foot pump on the inlet valve to blow out the piston (two sets of hands if possible), it doesnt take much as long as you have a decent seal. As you can see the piston is caked in crap - WD40 removes it. Clean up the piston with some lint free cloth and WD-40. Now you need to access the housing and clean it up and take off both inner and outer seals. Clean up the caliper around where the seals fit with a wire brush or similar, but be careful not to scratch the inner portion. Fit new seals and slot in piston. Fill caliper with new fluid. Refit caliper. Remove mole grips. Bleed that caliper. The hard part is getting the seals onto the caliper, the outer one especially as it has a metal edge with no give in it. You defo need two people!!! Cheers Stan momo 1 Link to comment Share on other sites More sharing options...
momo Posted October 3, 2012 Report Share Posted October 3, 2012 Nice DIY! How long did it take you to complete? Link to comment Share on other sites More sharing options...
analbeard Posted October 3, 2012 Report Share Posted October 3, 2012 The hard part is getting the seals onto the caliper, the outer one especially as it has a metal edge with no give in it. You defo need two people!!! I did it a month or so ago by myself with no problems Link to comment Share on other sites More sharing options...
DJ Syxx Posted October 3, 2012 Report Share Posted October 3, 2012 Good DIY I'd rather send it off though! Lol. Link to comment Share on other sites More sharing options...
analbeard Posted October 3, 2012 Report Share Posted October 3, 2012 Good DIY I'd rather send it off though! Lol. not actually that hard to do actually Syxx! Link to comment Share on other sites More sharing options...
DJ Syxx Posted October 3, 2012 Report Share Posted October 3, 2012 not actually that hard to do actually Syxx! I know dude, but rather not get my hands messy! analbeard and RizlaChris 2 Link to comment Share on other sites More sharing options...
Stan 24v Posted October 3, 2012 Author Report Share Posted October 3, 2012 Momo - Hour or so mate, after jacking up and getting wheel off etc. Anal - momo 1 Link to comment Share on other sites More sharing options...
Stan 24v Posted October 3, 2012 Author Report Share Posted October 3, 2012 Syxx - You'd get your hands messy taking it off in the first place DJ Syxx 1 Link to comment Share on other sites More sharing options...
momo Posted October 3, 2012 Report Share Posted October 3, 2012 Ok follow up question - how can you clamp steel braided brake lines? Link to comment Share on other sites More sharing options...
Stan 24v Posted October 3, 2012 Author Report Share Posted October 3, 2012 Only thing I can think of is to stick a plastic bung or similar inside the pipe. Never thought of that before though. Or, they may be able to still be clamped enough to nip the hose inside, but not sure if it would damage the braid. Link to comment Share on other sites More sharing options...
analbeard Posted October 14, 2012 Report Share Posted October 14, 2012 I know dude, but rather not get my hands messy! you tart DJ Syxx 1 Link to comment Share on other sites More sharing options...
Red320cd Posted October 19, 2012 Report Share Posted October 19, 2012 Only thing I can think of is to stick a plastic bung or similar inside the pipe. Never thought of that before though. Or, they may be able to still be clamped enough to nip the hose inside, but not sure if it would damage the braid. I have always clamped mine but using proprietory brake hose clamps, it does leave a little dent in the braid but I have always managed to remove this by putting a pair of pliers @ 90 degrees to the dent and gently squeezing it out. Remember the bore of stainless braided hoses is much much smaller than ordinary rubber hoses so you do not have to clamp as much to seal one off. Stan 24v 1 Link to comment Share on other sites More sharing options...
