mellonman Posted April 19, 2011 Share Posted April 19, 2011 As it says on the tin, whats the best way to remove the pistons out the uk calipar press out with peddal while still attached and then remove and for the final part use compressed air, but is there another way as i am refurbing the seals. also what would i use to clean up the bore and piston? what is it that makes them seize? damaged boot covers and brake dust? Quote Link to comment Share on other sites More sharing options...
Dnk Posted April 19, 2011 Share Posted April 19, 2011 (edited) If there still on the car use the fluid pressure to push the pistons out, you'll need to pack between the disc and pistons though to get them all just on the point of coming out then ease them out the last bit. if not i've used compressed air with the caliper held in a vice, if the pistons are pitted then fit new ones, wd 40 and fine wet & dry paper works well. The outer seals fail letting dirt and moisture get down the sides of the pistons Edited April 19, 2011 by Dnk (see edit history) Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 19, 2011 Share Posted April 19, 2011 Compressed air is a good way. Chris Wilson sells high quality replacements too Quote Link to comment Share on other sites More sharing options...
mellonman Posted April 19, 2011 Author Share Posted April 19, 2011 If there still on the car use the fluid pressure to push the pistons out, you'll need to pack between the disc and pistons though to get them all just on the point of coming out then ease them out the last bit. if not i've used compressed air with the caliper held in a vice, if the pistons are pitted then fit new ones, wd 40 and fine wet & dry paper works well. The outer seals fail letting dirt and moisture get down the sides of the pistons do you have to do them all at the same time or can you do one at a time Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 19, 2011 Share Posted April 19, 2011 Yeah, if one pops out before the others you'll be stuck as all the pressure/fluid will piss out of the huge hole the piston left Quote Link to comment Share on other sites More sharing options...
mellonman Posted April 19, 2011 Author Share Posted April 19, 2011 i do have the correct measurement of the packer that needs to go between the calipar pistons its in the toyota manual, but i can see the problem lol. Quote Link to comment Share on other sites More sharing options...
mellonman Posted April 19, 2011 Author Share Posted April 19, 2011 if i used compressed air this means i could do one at a time by not using the fluid preasure. how would you attach the compressed air with out leakage? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 19, 2011 Share Posted April 19, 2011 You must get all four pistons to the point of just coming past the seals and thus leaking, which is much easier to do on the cars hydraulics using the brake pedal and an assistant. I have made a fixture to pull the pistons out on the dirt seal flange, once the calipers are split. I see some absolute abortions where people have messed about for days, *uggered stuff up, and ended up costing themselves far more than if they'd just sent them to me in the first place. So be sure not to damage anything. To connect the air you use a -4 hose from the regulator with a 10mm banjo fitting on like the stock brake line. Quote Link to comment Share on other sites More sharing options...
mellonman Posted April 19, 2011 Author Share Posted April 19, 2011 Sorry are we talking about all 4 wheels and all 4 pistons at the same time? or just one wheel and 4 pistons i seem to be a bit confused, how hard are they to get back in then, i thought once calipar was no loger attached they would be quiet easy to put in. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 19, 2011 Share Posted April 19, 2011 Do one caliper at a time, clamping off the hoses as you go along to isolate each corner. They should pop in with thumb pressure once everything is clinically clean and greased up. Quote Link to comment Share on other sites More sharing options...
mellonman Posted April 19, 2011 Author Share Posted April 19, 2011 well thanks chris if i f them up looks like i would be getting your stainless ones Quote Link to comment Share on other sites More sharing options...
supra steveo Posted April 19, 2011 Share Posted April 19, 2011 i bought some of chris's stainless pistons and personally think they are awesome , CW fast road pads and CW stainless pad pins too if chris had of made the actual calipers i probably would of bought them too loljust one thing to note if you have a mate pump the pedal to the pistons out and one gets stuck clamp them until the one thats stuck works its way free any problems give me a shout otherwise chris is just repeating himself coz ive already asked all the stupid questions Quote Link to comment Share on other sites More sharing options...
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