brake caliper cleaning & rebuild
#2
Clarify...
Are you asking about a caliper rebuilt or just cleaning pads & rotors or...???
ETA: just to clean/wipe off rotors & pads, you can use brake-cleaner or mineral spirits. I routinely use mineral spirits to clean my rotors...simply wipe w/a blue shop paper towel.
Are you asking about a caliper rebuilt or just cleaning pads & rotors or...???
ETA: just to clean/wipe off rotors & pads, you can use brake-cleaner or mineral spirits. I routinely use mineral spirits to clean my rotors...simply wipe w/a blue shop paper towel.
Last edited by gotcbr; 04-17-2012 at 06:31 PM.
#3
It's the front caliper pistons they se to be not in sync with each other there all coming out a different rates soni thought by cleaning them it would sort the problem.
#4
Well, if the pistons are sticking, they most likely are bit rusted. Many times in cars, that have thick brake pads and that are not driven much the outer end of the piston rusts, and when the pad finally wears out, and the piston is pushed all the way back in, it seizes there. If the caliper is of splittable kind, there is an o-ring in the channel where the halfs meet. The best solution would be to buy a full brake gasket set since you're going to put it in pieces, there's no point in putting any old ones back there. Pull the pistons, if not rusted bad, they can be CAREFULLY cleaned using very fine grit sandpaper, or more preferrably one of those scrub-pads. If there are any dents in the piston sleeve caused by corrosion, that's a way for the fluid to escape, and it will tear your new gaskets, so replace pistons if need be. The bleeder valves are really soft metal and crap cheap so i normally replace those too if there is any deformation in the part where you should be turning it from. Get a can or two of brake cleaner and spray it inside and out, cleaning any rust and crap from the calipers, then let thorougly dry, preferrably blow the channels with compressed air. Replace every gasket, apply a film of fluid onto the piston seals before putting the pistons in, push them in as straight as you can, they normally stick if they are not pushed perfectly straight in there, re-assemble, put in new pads, bleed, test, ride. No big deal, over on an hour or two.
#5
#7
Remember to be very careful in rubbing the pistons, any scratch is a way for the high-pressure fluid to escape, also if you rub it enough to either deform it's roundness or diminish it's diameter it will not be tight enough against the seal, and it will leak. A light scrub should not do that yet, judge yourself when you see the pistons are they in a condition to be salvaged, or need replacing. But as a job, it's not a hard one to do.
#8
Remember to be very careful in rubbing the pistons, any scratch is a way for the high-pressure fluid to escape, also if you rub it enough to either deform it's roundness or diminish it's diameter it will not be tight enough against the seal, and it will leak. A light scrub should not do that yet, judge yourself when you see the pistons are they in a condition to be salvaged, or need replacing. But as a job, it's not a hard one to do.
I know I need the dust seals for both calipers and you said about the bleed nipples, is there anything else last thing I want to do it start a job then find I need to wait seals.
#9
Sorry, can't help you there... I've been, so to speak, pissed in the eye a couple times in Inet deals so I tend to rather pay a little extra to my parts dealer and have them find and order them, cause then if something is amiss, i have someone to point at...
Bleed nipples are something that at least here, You can get from any auto-parts dealer and from most service stations too, just get the old one, show it to them and say x-number of these, please... The regular ones cost from 10c to a couple of euros here, and as a Trucker, i have a big assortment-box of those and grease-nipples in my garage...
Bleed nipples are something that at least here, You can get from any auto-parts dealer and from most service stations too, just get the old one, show it to them and say x-number of these, please... The regular ones cost from 10c to a couple of euros here, and as a Trucker, i have a big assortment-box of those and grease-nipples in my garage...