mattius Posted August 13, 2009 Share Posted August 13, 2009 My brakes are rubbing at the front, it seems i have a sticky piston, they work perfect i just have a squeeling as i drive. Took it out for a good blast today trying to burn it off and failed, so im thinking the seals have hardened. Anyway, any tips? should i replace the pistons at the same time. Link to comment Share on other sites More sharing options...
JMH Posted August 14, 2009 Share Posted August 14, 2009 How do they look (pistons)? If nice and shiny - reuse. Link to comment Share on other sites More sharing options...
mark spit Posted August 14, 2009 Share Posted August 14, 2009 Clean them up on a bench wire wheel to get rid of any surface rust, probably all they'll need. Mark Link to comment Share on other sites More sharing options...
mattius Posted August 14, 2009 Author Share Posted August 14, 2009 can always fire them in the lathe and take a thou off them. Link to comment Share on other sites More sharing options...
SteveA Posted August 14, 2009 Share Posted August 14, 2009 I thought the calliper pistons were usually hard chromed to give a smooth, corrosion resistant finish. The trouble is that the chrome layer can lift off, like you might have found on cheap tools, once this happens the peeling chrome can score and cut the seals. Link to comment Share on other sites More sharing options...
DaveNotSoSideways Posted August 14, 2009 Share Posted August 14, 2009 can always fire them in the lathe and take a thou off them. Don't do that, caliper pistons are HARD CHROMED You'll just bugger them...Unless they are stainless. Also the tolerance is too close to clean them up that way...0.001" won't do anything anyway. Link to comment Share on other sites More sharing options...
mattius Posted August 14, 2009 Author Share Posted August 14, 2009 Foobared piston Link to comment Share on other sites More sharing options...
DaveNotSoSideways Posted August 14, 2009 Share Posted August 14, 2009 Odd issue, looks like its been "bashed". Link to comment Share on other sites More sharing options...
mattius Posted August 14, 2009 Author Share Posted August 14, 2009 think the p/o must have fooked instalation, looks like its been gripped in a vice. too much corrosion round the top edge of the shinny bit aswell. Link to comment Share on other sites More sharing options...
GT6 Nick Posted August 14, 2009 Share Posted August 14, 2009 Yep, that's fubarred. So it's a choice between an original chromed piston, and one of those new stainless steel ones. If you go the stainless route, there was a thread a while ago about how their surfaces aren't as smooth as they should be, and would need polishing. A good job to do if you're going to be laid up a while? Link to comment Share on other sites More sharing options...
mattius Posted August 15, 2009 Author Share Posted August 15, 2009 no way im paying the price of the stainless pistons these ones have lasted 20yrs fine. Link to comment Share on other sites More sharing options...
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