Rebuilding Calipers

[jimmmy]

Hey guys

I have recently grabbed some R33 gtst calipers which need a bit of a clean up.

They have ha dodgey paint job done on them and I want them back to factory look if possible.

I am happy on splitting them apart with an air compressor etc and running a kit through them.

My question is with regards to getting rid of the paint, grease, dir, crap etc.

Should I acid dip or is this a bad idea?

Can I get them media blasted with a fairly gentle grade?

I am guessing I can whack on bleed nipples over the inlet and bleed attachment to stop media getting into the caliper itself????

Any ideas or opinions would be great

cheers

James

[Ronin 09]

i wouldn't acid dip them as this may fcuk the bores and internal brake galleries...

i would leave old bleed nipples in and mask over the piston then sand blast them carefully.

[jimmmy]

i wouldn't acid dip them as this may fcuk the bores and internal brake galleries...

i would leave old bleed nipples in and mask over the piston then sand blast them carefully.

hey mate

I am guessing just taping over the pistons will be enough to stop the media blast damaging them? I was going to bead blast minimum to minimise the amount of crap getting inside the calipers. Does it matter if the exposed part of the calipers are blasted????

I take it that it would be bad for the sleeve where the piston slids into the calipers to get any sort of blasting on its surface???

cheers

James

[Ronin 09]

yep i reckon that should be fine. just make sure you don't get any grit into the hydraulic internals, or into the bore of the piston (what you've referred to as the sleeves)

good luck!

cheers

[SLY33]

my brother stripped, sandblasted and painted mine for me, came up literally like new. Will see if i can get him to comment on the details

[Beer Baron]

my advice is. if you can avoid splitting them the better off you'll be. once the two sides are split it can be hard to get it to seal again. I would sand blast them with the nipples in. and brake lines on to prevent crap getting inside. then remove the pistons etc and rebuild, then repaint, then refit. all done

[Gts-t]

my advice is. if you can avoid splitting them the better off you'll be. once the two sides are split it can be hard to get it to seal again. I would sand blast them with the nipples in. and brake lines on to prevent crap getting inside. then remove the pistons etc and rebuild, then repaint, then refit. all done

This is how i did it. No issues with crap getting inside and they come up looking perfect once painted.

Good luck

[SMOKE'M]

why dont you just keep them together and use paint striper,then just wipe it all down once all done,it gets all the paint off,the grease,an other crap

[jimmmy]

This is how i did it. No issues with crap getting inside and they come up looking perfect once painted.

Good luck

I take it that it is not hard to get a kit through them if they are not pulled apart? IE to put new piston seals etc in?

I have been quoted $95 per caliper to rebuild by a place in Queanbeyan.....this sound right or a bit pricey? It includes stripping them down, cleaning, new kit. Obviously does not include painting.

I am not sure if powder coating is as good or whatever when compared with powder coating calipers....???

cheers

James