ashley peddle 3 Posted May 25, 2006 (edited) fitted 306xsi calipers yesterday (266mm) and bled them etc (had new pads and disks all round) went on a bit of a road trip to bed them in but they were dead... first few attempts to 'stop' left my foot to the floor and me rolling to a stand still as i got nearer home they got better and better - id like to add that it is raining VERY hard lastnight where i was... used them this morning and they feel ok though. i still have to push the pedal half way to the floor to make them work at all, but once they bite they are good... (so need bleeding again i would imagine?) when iv explained this to people they have all been confused was it just the system pressurising? (bearing in mind that the caliper was off) any opinions welcome thanks ash Edited May 25, 2006 by ashley peddle Share this post Link to post Share on other sites
hengti 2 Posted May 25, 2006 (edited) i'd bleed them again to be absolutely sure there's no air in there - but think that this could well be symptomatic of master cylinder failure when mine went, it was very similar - sometimes a very good pedal, sometimes no pedal - very intermittent mine went immediately after changing the hoses to stainless ones - the extra pressure in the system was too much for the old m/c seals. imo, unless your m/c is relatively new, i'd always renew it when modifying anything in the system that will likely have it working harder (eg. bigger callipers/braided hoses etc) - especially when you consider the potential cost of m/c failure vs. £30 for a new one Edited May 25, 2006 by hengti Share this post Link to post Share on other sites
richsmells 2 Posted May 25, 2006 Yeah mine was the same after I fitted braided hoses. Until I had a new master cylinder fitted the brakes were a bit dodge. Did you bleed the rears as well? When I bleed the rears I give the pedal a few short sharp bursts to sort the compensator out. Obviously there are two on your 1.9. Share this post Link to post Share on other sites
Alastairh 47 Posted May 25, 2006 haven't the 266 brakes got bigger piston diamater, hence why you would expect a slight difference using your original master cylinder. Alastair Share this post Link to post Share on other sites
hengti 2 Posted May 25, 2006 (edited) different m/c bore sizes do give different pedal travel (and i guess they'd need matching to the calipers), but there's something else wrong if the pedal is operating the brakes at different points of its travel on different ocassions Edited May 25, 2006 by hengti Share this post Link to post Share on other sites
ashley peddle 3 Posted May 25, 2006 The brakes have been getting progressivly better the longer i drive the car - not getting better then worse Share this post Link to post Share on other sites
hengti 2 Posted May 25, 2006 (edited) ashley mate, there's possibly something wrong with them - be careful! edit : i've just had a thought - did you renew the pads at the same time? sometimes they can take a long time to bed in and feel terrible to start with Edited May 25, 2006 by hengti Share this post Link to post Share on other sites
ashley peddle 3 Posted May 25, 2006 im driving carefully anyways (well - slowly!) because im bedding them in and dont want to have to brake hard the pads were part-worn and we buffed them with a file before fitting (to ensure they were flat) Share this post Link to post Share on other sites
danpug 1 Posted May 25, 2006 When i first fitted my 266mm set-up the pedal did drop a lot with nothing then it bit suddenly. It did this for a while but now they bite instantly, the pedal has firmed right up for some reason. Share this post Link to post Share on other sites
Jrod 7 Posted May 26, 2006 Fitted GTI calipers to my XS last night and to start they were awful, after they bedded in tho....wow. Share this post Link to post Share on other sites
