dreamer_uk75 Posted March 22, 2009 Share Posted March 22, 2009 scuse poor typing sitting on the drive with mucky fingers! changing front pads and discs -0 one disc done and one pad done, but piston wont retract far enough to get the other pad of nthe pair done. tried levering it with a screwdriver but it just bends the screwdriver and is starting to mark the piuston surface. i have a track session on thursday so need to get it done asap - any ideas as quite worried now! Link to comment Share on other sites More sharing options...
CageyH Posted March 22, 2009 Share Posted March 22, 2009 Have you undone the reservoir cap? Pop the old pads in, but the caliper back on the disc. Insert a larger bar between the piston and the pad, and lever it back in. Only dead fish go with the flow....! Link to comment Share on other sites More sharing options...
Normans_Ghost Posted March 22, 2009 Share Posted March 22, 2009 Also try 2 screw drivers, one top and the other bottom and try and wiggle them so the piston is squared up to the bore and goes back in. In other words it sounds to me that you have levered one side and "cockled" the piston. (Damn! Said I wouldn't give this advise anymore) ed to ad that if you don't remove the fluid cap you may have a jet of brake fluid spraying all over the shiny paintwork (which won't be that shiny after) Norman Verona, 1989 BDR 220bhp, Reg: B16BDR, Mem No 2166, the full story here You and your seven toThe French Blatting Company Limited Edited by - nverona on 22 Mar 2009 17:31:24 Link to comment Share on other sites More sharing options...
dreamer_uk75 Posted March 22, 2009 Author Share Posted March 22, 2009 Thanks guys, given up for today :( Tried a few things but nothing would work - hopefully going to try to get some help to change the caliper later this week (before Thursday !! EEK!) Link to comment Share on other sites More sharing options...
dreamer_uk75 Posted March 22, 2009 Author Share Posted March 22, 2009 On taht note - I have got 2 second hand calipers I've had for a while, is there any way to tell if they work before taking the old one off and replacing them (rebleeding the system etc. etc.)? Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted March 22, 2009 Share Posted March 22, 2009 Try a G-clamp for gentle pressure ! Link to comment Share on other sites More sharing options...
Chris Norman Posted March 23, 2009 Share Posted March 23, 2009 Hi Jo, Would a wind back tool help? Let me know, I will drop off. Chris (Knaphill) Link to comment Share on other sites More sharing options...
Normans_Ghost Posted March 23, 2009 Share Posted March 23, 2009 Chris, fronts don't need to be wound back. Norman Verona, 1989 BDR 220bhp, Reg: B16BDR, Mem No 2166, the full story here You and your seven toThe French Blatting Company Limited Link to comment Share on other sites More sharing options...
tweeky Posted March 23, 2009 Share Posted March 23, 2009 just watch for brake fluid overflowing on the scuttle once youve got the pistons free !!! Tweeky In a purple haze Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted March 23, 2009 Share Posted March 23, 2009 Strip that paint !!!! It only takes a few seconds 😳 Link to comment Share on other sites More sharing options...
Roger Ford Posted March 23, 2009 Share Posted March 23, 2009 Have you sorted it Jo? I have a special tool which might help (no, it's not a hammer). Like this Link to comment Share on other sites More sharing options...
h_____ Posted March 23, 2009 Share Posted March 23, 2009 Is your wind back tool, just a brake piston spreader? If so that might be of use. Dreamer, well worth spending £20quid in halford on one, very uesfull. Also try checking the piston is stuck, so gently depress brake pedal to get pistons moving again. Becareful not to pop them out out though. Maybe have a block of wood in there. Then try to wind them back again. If the piston is sticky it may need some work anyway. if you have spare caliper easy to try a swap, wont take long. I've done one at circuit before. Link to comment Share on other sites More sharing options...
Chris Norman Posted March 23, 2009 Share Posted March 23, 2009 Hi Norman, Been a while, how are you? h - tool is not a spreader and as Norman says the fronts don't need winding back 😶🌫️, thought it might help with pushing the piston back. Jo (dreamer) is local so might be worth a try Chris Link to comment Share on other sites More sharing options...
Normans_Ghost Posted March 23, 2009 Share Posted March 23, 2009 Hi Chris, we're fine, how are you? I'll put a pound to a penny that the piston is cockled. I try not to "tell" people how to do things anymore as I feel it can be "dangerous" in the sense I can't pass 50 years experience on over a forum. This is a good example. He should be able to see it by looking at the piston from the side and judging the "squareness" in the housing. Wants to refit the callioper and use two bars (screwdrivers) to, firstly square it up then to push the piston back in. Norman Verona, 1989 BDR 220bhp, Reg: B16BDR, Mem No 2166, the full story here You and your seven toThe French Blatting Company Limited Link to comment Share on other sites More sharing options...
mav Posted March 23, 2009 Share Posted March 23, 2009 Norma, Jo is a she not a he Link to comment Share on other sites More sharing options...
dreamer_uk75 Posted March 23, 2009 Author Share Posted March 23, 2009 Common mistake (until you meet me!) Thanks for all the tips guys - I'm up against it with time (testing on Thursday) so I've decided to take it to Ben Rockey tomorrow for him to change the caliper (skills are beyond me on my own and at least he'll have a new one in stock if my old ones don't work). Pressing the brake pedal reasonably firmly didn't get the piston moving so I think it's "good 'n' stuck". I don't have a clamp I could use, and I do have a windback tool for the rears but couldn't bastardise that to work on the fronts. Norman - I think I understand what you mean, but in the interests of "not making it worse" I think the best way is to take it to ben tomorrow. He can also show me how it all works - like you say it's difficult to explain over a forum without pics!! Thanks for everyones help though :) That windback tool looks pretty useful - perhaps another one to add to the list! Link to comment Share on other sites More sharing options...
Normans_Ghost Posted March 23, 2009 Share Posted March 23, 2009 Jo, good decision. Glad you weren't insulted by my comments but understood what I was saying. Can you ley us know what Ben finds, Norman Verona, 1989 BDR 220bhp, Reg: B16BDR, Mem No 2166, the full story here You and your seven toThe French Blatting Company Limited Link to comment Share on other sites More sharing options...
dreamer_uk75 Posted March 24, 2009 Author Share Posted March 24, 2009 Will do, I'm curious myself! And kicking myself for not sorting out the second hand calipers I bought last year with the express intention of sorting-out just for this occasion! Link to comment Share on other sites More sharing options...
dreamer_uk75 Posted March 24, 2009 Author Share Posted March 24, 2009 Ben got the caliper off and replaced it with one of mine which worked perfectly :) In the end they had to split the caliper to get the piston out - looks like where the seal had split, water and crud had got in, and a load of rusty cr*p was all over the cylinder that the piston slides in/out of. Ben's going to clean it up and see if he can get replacement parts for it, so I still have a spare caliper :) Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted March 24, 2009 Share Posted March 24, 2009 Hurrah Link to comment Share on other sites More sharing options...
dreamer_uk75 Posted March 24, 2009 Author Share Posted March 24, 2009 :D Now hoping the car holds together for Thursday - it's been a few weeks of just about EVERYTHING breaking! Link to comment Share on other sites More sharing options...
I.Mupferit Posted March 25, 2009 Share Posted March 25, 2009 I see you were in Kit Car again this month Jo. Did you receive my mail about the Rivnut tool? Brent (aka Arfur Nayo) Lotus Elise Probably the best hair dryer in the world! 😬 Link to comment Share on other sites More sharing options...
dreamer_uk75 Posted March 27, 2009 Author Share Posted March 27, 2009 :D Fame !! Yes I did thank yo u- sorry haven't replied yet! Ordering today I think! Link to comment Share on other sites More sharing options...
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