wombat Posted January 27, 2012 Report Share Posted January 27, 2012 Says it all really. Got it back from major service last week - only noticed this arvo about 5 mins before the shop shut (of course they wouldn't answer the phone) Bleeding the brakes - fresh fluid was part of the service. Will limp it to work on Monday and drop by the shop on the way home. Nipple is done up tight, but seeps past the threads when you apply pressure Always happens near or on the weekends -new nipple the answer? or teflon thread? Bob Link to comment Share on other sites More sharing options...
budda Posted January 27, 2012 Report Share Posted January 27, 2012 Says it all really. Got it back from major service last week - only noticed this arvo about 5 mins before the shop shut (of course they wouldn't answer the phone) Bleeding the brakes - fresh fluid was part of the service. Will limp it to work on Monday and drop by the shop on the way home. Nipple is done up tight, but seeps past the threads when you apply pressure Always happens near or on the weekends -new nipple the answer? or teflon thread? Bob Go to your dealer and get a new one, fit it and you'll be fine. Link to comment Share on other sites More sharing options...
BudgetBoy Posted January 27, 2012 Report Share Posted January 27, 2012 Take it back to them and get them to sort it out mate.Why should you pay if they have damaged it. Link to comment Share on other sites More sharing options...
alexp5 Posted January 27, 2012 Report Share Posted January 27, 2012 Take it back to them and get them to sort it out mate.Why should you pay if they have damaged it. This^. But some PTFE tape round the threads will do the trick. Link to comment Share on other sites More sharing options...
Superdunc Posted January 27, 2012 Report Share Posted January 27, 2012 This^. But some PTFE tape round the threads will do the trick. Tis' a bodge at best, the tapered seat should seal the nipple (guffaw). If the fluid is leaking past the threads the seat is damaged or there's some shit stopping it seating properly. Link to comment Share on other sites More sharing options...
alexp5 Posted January 27, 2012 Report Share Posted January 27, 2012 Tis' a bodge at best, the tapered seat should seal the nipple (guffaw). That's how I roll. Link to comment Share on other sites More sharing options...
marcaztls Posted January 27, 2012 Report Share Posted January 27, 2012 Tis' a bodge at best, the tapered seat should seal the nipple (guffaw). If the fluid is leaking past the threads the seat is damaged or there's some shit stopping it seating properly. This is quite a common problem, especially with the Tokico's like the one's you have. It's the seat in the actual caliper body that is likely to be damaged from overtightnening the nipple. Sadly I doubt a new nipple will sort it and I really wouldn't trust PTFE tape to be a long lasting solution on something as critical as brakes. Sorry. Link to comment Share on other sites More sharing options...
wombat Posted January 28, 2012 Author Report Share Posted January 28, 2012 From the looks, it looks like it's a brand new nipple anyway, much shinier and new than the L/h side one. I'm gonna ask them why is that? Bob BTW I thought Blue Spots and original TRX ones were Sumitomo? Link to comment Share on other sites More sharing options...
marcaztls Posted January 28, 2012 Report Share Posted January 28, 2012 From the looks, it looks like it's a brand new nipple anyway, much shinier and new than the L/h side one. I'm gonna ask them why is that? Bob BTW I thought Blue Spots and original TRX ones were Sumitomo? Sorry, you're right, Sumitomo. I've got Tokico's on the brain at work... Link to comment Share on other sites More sharing options...
BudgetBoy Posted January 28, 2012 Report Share Posted January 28, 2012 Got it back from major service last week - only noticed this arvo about 5 mins before the shop shut (of course they wouldn't answer the phone) Bleeding the brakes - fresh fluid was part of the service. Nipple is done up tight, but seeps past the threads when you apply pressure Always happens near or on the weekends -new nipple the answer? or teflon thread? Bob From the looks, it looks like it's a brand new nipple anyway, much shinier and new than the L/h side one. I'm gonna ask them why is that? And there you go.. They have put on a new bleed nipple,so they are the ones that have damaged the thread.So take it back and get THEM to repair it. Sticking PTFE tape over it will not fix the fault in the long term.And i would not like to rely on that for my front brakes,rear maybe but not the front's. Get it back to them and get it fixed. They can either tap it out to a bigger thread size or put an insert into it.(Much better than tape imo) Link to comment Share on other sites More sharing options...
marcaztls Posted January 28, 2012 Report Share Posted January 28, 2012 And there you go.. They have put on a new bleed nipple,so they are the ones that have damaged the thread.So take it back and get THEM to repair it. Sticking PTFE tape over it will not fix the fault in the long term.And i would not like to rely on that for my front brakes,rear maybe but not the front's. Get it back to them and get it fixed. They can either tap it out to a bigger thread size or put an insert into it.(Much better than tape imo) Tapping it out or a larger thread size won't help the seat in the caliper unless they can repair that though. It's cheaper and likely quicker for them to get another caliper from Fleabay etc. and refresh that. Link to comment Share on other sites More sharing options...
BudgetBoy Posted January 28, 2012 Report Share Posted January 28, 2012 Tapping it out or a larger thread size won't help the seat in the caliper unless they can repair that though. It's cheaper and likely quicker for them to get another caliper from Fleabay etc. and refresh that. You can machine & tap in a new larger thread or add a helicoil type thing (expensive & time consuming). I would say that the original thread's has been over tightened and pulled the threads,this is why it leaks past under pressure.But either way THEY should fix it IMO. Link to comment Share on other sites More sharing options...
Superdunc Posted January 28, 2012 Report Share Posted January 28, 2012 You can machine & tap in a new larger thread or add a helicoil type thing (expensive & time consuming). I would say that the original thread's has been over tightened and pulled the threads,this is why it leaks past under pressure.But either way THEY should fix it IMO. The threads do not seal the bleed nipple, and the op says the nipple is tight. There is a tappered seat at the bottom of the thread, this is the part that is damaged or dirty if a bleed nipple is leaking. I have repaired the seats on alloy calipers before, and you can do it with basic tools if your compitent. Link to comment Share on other sites More sharing options...
marcaztls Posted January 28, 2012 Report Share Posted January 28, 2012 The threads do not seal the bleed nipple, and the op says the nipple is tight. There is a tappered seat at the bottom of the thread, this is the part that is damaged or dirty if a bleed nipple is leaking. I have repaired the seats on alloy calipers before, and you can do it with basic tools if your compitent. Excatly this the threads... I've only ever repaired one seat on a crappy rear caliper for a race bike that was rarely used but it did work. I'd rather replace the caliper if they're cheap enough to buy second hand personally, but I see no problem with a repair. Link to comment Share on other sites More sharing options...
wombat Posted January 28, 2012 Author Report Share Posted January 28, 2012 Thanks for the info guys. At least I have a bit of knowledge to arm myself with when I pop in there tomorrow. Bob Link to comment Share on other sites More sharing options...
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