MattP Posted December 16, 2014 Share Posted December 16, 2014 Has anybody done a UK spec Caliper rebuild guide thread I am aware of the J-Spec guide in our tech section but as most of you are aware the UKs are a bit different.. I only ask as I will be doing a full UK set this winter and il document it for the forum if it has not been done. Quote Link to comment Share on other sites More sharing options...
Timlowthian Posted December 16, 2014 Share Posted December 16, 2014 I've got a set ready to do so a full guide would be very helpful to me. Only seen the J-spec one on here. Quote Link to comment Share on other sites More sharing options...
Rich.2211 Posted December 16, 2014 Share Posted December 16, 2014 I'm planning on doing mine also so a guide is always useful Quote Link to comment Share on other sites More sharing options...
DodgyRog Posted December 16, 2014 Share Posted December 16, 2014 I have a spare full set on the shelf to refurbs as well, so a guide would be good Matt Make sure you take lots of pics, as I have a habit of skim reading if there are to many words lol Quote Link to comment Share on other sites More sharing options...
MattP Posted December 16, 2014 Author Share Posted December 16, 2014 Need to order the goodies from Mr CW then il get to it then il report back when all is done. Quote Link to comment Share on other sites More sharing options...
Hitbox Junkie Posted December 16, 2014 Share Posted December 16, 2014 A video would be great too Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 16, 2014 Share Posted December 16, 2014 Push the pistons out as far as you dare using the brake pedal, then violently manhandle them out with cloth-covered mole grips Sand down pistons and bores with 1200grit. Replace any that are pitted with corrosion via Mr Chris Wilson. Fit new seals and things, coated with a bit of the lithium grease in the rebuild kit, and put back together. Clean up the monumental amount of brake fluid that's gotten everywhere during this procedure. Taste brake fluid in the back of your throat for the rest of the day. Brake apprehensively. Don't panic when it smells like your brakes are on fire the first time you get them nice and hot and all the newness cooks off Quote Link to comment Share on other sites More sharing options...
Rich.2211 Posted December 16, 2014 Share Posted December 16, 2014 Daft question maybe, what do you do with the brake hoses when the caliper is removed? Do you blank it off with a nut, bolt and couple of washers or clamp the hose? I don't really want to clamp the brake hoses in case it damages them internally. Quote Link to comment Share on other sites More sharing options...
MattP Posted December 16, 2014 Author Share Posted December 16, 2014 (edited) Daft question maybe, what do you do with the brake hoses when the caliper is removed? Do you blank it off with a nut, bolt and couple of washers or clamp the hose? I don't really want to clamp the brake hoses in case it damages them internally. I will be purging the system on this occasion In fact I usually just let the stuff run out into a tub... I always replace the whole system with dot5.1 my car does not get driven hard the likelyhood of me cooking this fluid is near impossible plus it's relatively cheap.. Edited December 16, 2014 by MattP (see edit history) Quote Link to comment Share on other sites More sharing options...
MattP Posted December 16, 2014 Author Share Posted December 16, 2014 Push the pistons out as far as you dare using the brake pedal, then violently manhandle them out with cloth-covered mole grips Sand down pistons and bores with 1200grit. Replace any that are pitted with corrosion via Mr Chris Wilson. Fit new seals and things, coated with a bit of the lithium grease in the rebuild kit, and put back together. Clean up the monumental amount of brake fluid that's gotten everywhere during this procedure. Taste brake fluid in the back of your throat for the rest of the day. Brake apprehensively. Don't panic when it smells like your brakes are on fire the first time you get them nice and hot and all the newness cooks off My calipers are still free moving is it possible to remove them and use compressed air on my bench as I did with the J-Specs to remove the Pistons before splitting the calipers Quote Link to comment Share on other sites More sharing options...
MattP Posted December 16, 2014 Author Share Posted December 16, 2014 I will look at powder coating while I'm on. I have requested from Mr CW Full set stainless Pistons CW Fast road pads Stainless pins Caliper seal kit Caliper gasket set I have a new set of discs and braided lines at hand aswell. Quote Link to comment Share on other sites More sharing options...
Rich.2211 Posted December 16, 2014 Share Posted December 16, 2014 I will be purging the system on this occasion In fact I usually just let the stuff run out into a tub... I always replace the whole system with dot5.1 my car does not get driven hard the likelyhood of me cooking this fluid is near impossible plus it's relatively cheap.. To be honest I would be daft not to do the same! Quote Link to comment Share on other sites More sharing options...
MattP Posted December 16, 2014 Author Share Posted December 16, 2014 To be honest I would be daft not to do the same! To be fair mate these brakes see 3k miles a year over 6 months use They come off every winter to check them over its just this year the car is 16 years old I may aswell get them stripped and rebuilt before my luck runs out and one seizes. Besides what else would I do with my time I'm an extremely boring person I spent last New Years eve working on my own in the garage on the car.. Quote Link to comment Share on other sites More sharing options...
mellonman Posted December 17, 2014 Share Posted December 17, 2014 heres one i done some time ago http://www.mkiv.co.uk/vbb/showthread.php?244873-uk-brake-refurb&highlight=brake Quote Link to comment Share on other sites More sharing options...
Dnk Posted December 17, 2014 Share Posted December 17, 2014 (edited) 2 Pieces of anything flat and mole grips to hold over the banjo, i've stripped a few sets down completely, make sure they are 100% clean when you put them back together A word of warning, if you sandblast or sand down the piston bores some debris will get inside the fluid runs, where the two halves meet there are seals, these create a small shoulder where the debris collects and its impossible to remove unless you take both halves apart. I know because i tried to do this on set and thought i'd got them clean, i used lots of brake cleaner sprayed down the fluid runs and then blown out with compressed air and repeated this process, i was surprised how much debris was trapped on the seal when i took one caliper apart They are also marked up L and R on both parts of the caliper No need to purge the system of fluid, when you bleed the brakes just use the new fluid to push out the old, if you can get your hands on a vacuum bleeder it makes this very easy to do and quick Edited December 17, 2014 by Dnk (see edit history) Quote Link to comment Share on other sites More sharing options...
Nic Posted December 17, 2014 Share Posted December 17, 2014 My calipers are still free moving is it possible to remove them and use compressed air on my bench as I did with the J-Specs to remove the Pistons before splitting the calipers No need to use compressed air, remove the caliper but don't disconnect the brake lines, then just push the brake pedal and the pistons will pushed out. Quote Link to comment Share on other sites More sharing options...
Dnk Posted December 17, 2014 Share Posted December 17, 2014 (edited) Leave the caliper bolted to the hub, use some thin wood etc to put between the discs and pistons then pump the pedal, if you pop one piston out before the others which will happen then you have to wriggle them out the hard way, not sure how thick the wood needs to be to let you get the pistons nearly all the way out though. Measure the back plates of the pads which should get you close to the dimension req Or you can use compressed air just keep your fingers out the way Edited December 17, 2014 by Dnk (see edit history) Quote Link to comment Share on other sites More sharing options...
MattP Posted December 17, 2014 Author Share Posted December 17, 2014 That's the idea mate I need to split them to do a proper job IMO I fortunately did buy a vacuum bleeder makes the job so much easier. Quote Link to comment Share on other sites More sharing options...
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