ferny Posted October 6, 2008 Share Posted October 6, 2008 I noticed my clutch was leaking before the RBRR so replaced the seals. Everything inside looked fine. No scores or rust or anything. I've just this second had a nose in the engine bay for another reason and seen fluid on the bulkhead. The clutch reservoir is half empty.Before I take it all apart again to check can you guys suggest what may be wrong? Maybe I didn't put it together properly somehow? Link to comment Share on other sites More sharing options...
CharlieB Posted October 6, 2008 Share Posted October 6, 2008 My old brake master cylinder leaked from the threaded pipe connector, check yours is not doing the same. Link to comment Share on other sites More sharing options...
willcolumbine Posted October 6, 2008 Share Posted October 6, 2008 Yeah, park it on the level and clean it up. Next time you look at it see where it's dripped. If it's on the bulkhead side of the master cylinder flanges it's the dripping from the threaded brake pipe connection. If you pop off the rubber dust seal and it's full of fluid then you know it's leaking from there. At least then you'll know where the problem lies. Link to comment Share on other sites More sharing options...
ferny Posted October 6, 2008 Author Share Posted October 6, 2008 It's leaking from the seals - just like it was before. that's why I replaced them. :'( Link to comment Share on other sites More sharing options...
Clive Posted October 6, 2008 Share Posted October 6, 2008 Buy a new cylinder. Wilwoods ones are good I believe, and not expensive. Link to comment Share on other sites More sharing options...
willcolumbine Posted October 6, 2008 Share Posted October 6, 2008 hmmm....having just had to rebuild one of my Wilwoods after less than 100 miles I'm not sure they are as good as some people make out. Not sure what caused it (nothing obvious) but it seems to be alright now though. Link to comment Share on other sites More sharing options...
CharlieB Posted October 6, 2008 Share Posted October 6, 2008 What fluid do you use? Link to comment Share on other sites More sharing options...
ferny Posted October 7, 2008 Author Share Posted October 7, 2008 Normal dot4 - same as for my brakes. Link to comment Share on other sites More sharing options...
Richard B Posted October 7, 2008 Share Posted October 7, 2008 I'd buy a new cylinder; they're not too dear. Bloody hell I've just seen the prices £30 - £60! :o ??) Link to comment Share on other sites More sharing options...
ferny Posted October 7, 2008 Author Share Posted October 7, 2008 £40 is what I expected. I think they've gone down slightly in price? although I've no idea waht the difference is between original and repo.. Link to comment Share on other sites More sharing options...
heraldcoupe Posted October 8, 2008 Share Posted October 8, 2008 When you rebuilt your master cylinder, did you thoroughly flush out the rest of the system? Any remaining degraded rubber seal and fluid in the system will quickly contaminate the new fluid. This is why both ends of the system should be rebuilt at the same time. Having said this, your seals have failed in record time, so I suspect there is a more significant underlying problem.With the cylinder dismantled, you need to ensure that the bore of the cylinder is perfectly smooth, with no grooves or ridges in any plane. Raised crystaline deposits from the old fluid can be polished from the bores, Brasso is good for this. Scoring can be dealt with by honing, but you will need a suitably sized honing stone. As it's a clutch cylinder, so not safety critical,, you may get away with fine wet & dry with copious amounts of 3 in 1 oil. WHatever you use, flush thoroughly with meths or proprietory brake cleaner before reassembly,Cheers,Bill. Link to comment Share on other sites More sharing options...
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