Robin Posted May 13, 2019 Report Share Posted May 13, 2019 I need to replace the leaking clutch master cylinder on my Mk2 Vitesse and just wanted some advice on how to bleed the system once the new cylinder is fitted. Is it straight forward? Also, any advice on where to get a new master cylinder - the one currently fitted doesn't look to be original ? Many thanks Robin Link to comment Share on other sites More sharing options...
Colin Lindsay Posted May 13, 2019 Report Share Posted May 13, 2019 Don't start Pete on the 'up and down / quick - hold it - and slow' stuff again. Bleed nipple to the top of the slave cylinder with a clear plastic pipe on, running to a jar of fluid and making sure it's beneath the level of the fluid in the jar to prevent air getting back in, (and where you can see it from your position unless you've a competent assistant!). Open the bleed nipple a turn or two with the master cylinder full of fluid, then just press the pedal slowly steadily and firmly to the bottom, and release slowly; keep an eye on the level in the master cylinder and after three or four presses, once bubbles stop coming along the pipe - make sure there are no late arrivals - then have the bleed nipple closed again. Job done. What does your current cylinder look like? It should be a 0.7 inch bore, same as my GT6, but some are metal these days, some plastic, and some aftermarket that might or might not do the job. Originally the reservoir and the cap would have been horizontal when mounted; some of the newer cylinders are at the wrong angle so the cap is tilted towards the front. Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 13, 2019 Report Share Posted May 13, 2019 Colin no idea what you are on about , Tneres a lot of ups and downs in life , some more pleasurable than others Robin its best with the tunnel off but with with thin fingers and a wonky spanner you can just fiddle to undo the slave bleed from the engine bay, tie a string on the spanner so you can retrieve it when dropped The more modern with a plastic reservoir may not be at the full angle but they hold more and you can see the levels you dont have to brim it till it spills. Overall they are better but not original land rover parts are similar and very cheap Link to comment Share on other sites More sharing options...
68vitesse Posted May 13, 2019 Report Share Posted May 13, 2019 The hole for the clutch operating lever in the bell housing always seems to me an open invitation to drop things in. Originally the brake master cylinder reservoir wasn't horizontal so don't see why a non horizontal clutch master cylinder would be a problem. Regards Paul Link to comment Share on other sites More sharing options...
Colin Lindsay Posted May 13, 2019 Report Share Posted May 13, 2019 6 hours ago, Pete Lewis said: Colin no idea what you are on about , It's an age thing Pete, so I'll quote you from the Mini brakes thread.... "Yes down quick back slow.........reminds me of something else pete" However Paul's right, Heralds and other smaller Triumphs have a horizontal brake master cylinder - usually replaced these days by right-angled versions as nowt else is available; but not that strange Vitesse thingy. Nor my GT6 either, as I had to run out and check, so just ignore that last bit of the earlier post. Link to comment Share on other sites More sharing options...
poppyman Posted May 13, 2019 Report Share Posted May 13, 2019 I keep wondering which website i have logged on to?? Very confusing all these up and downs......... Tony. Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 13, 2019 Report Share Posted May 13, 2019 Tony youve got it wrong its downsy and upsy not upsy and downsy Try Dougs alternative forum it not mine Ha!! 1 Link to comment Share on other sites More sharing options...
Robin Posted May 13, 2019 Author Report Share Posted May 13, 2019 Thanks for the advice I've attached 2 pics of the Master Cylinder that's currently fitted but I think the one I need is similar to the one James Paddock sells - GMC205P. Does it matter that it's sloping and not straight? Link to comment Share on other sites More sharing options...
johny Posted May 13, 2019 Report Share Posted May 13, 2019 Yes that's the original design clutch master cylinder sold by JP. Has a smaller reservoir than yours but running out of clutch fluid isn't as serious as on the brakes😳 Link to comment Share on other sites More sharing options...
Robin Posted May 13, 2019 Author Report Share Posted May 13, 2019 59 minutes ago, johny said: Yes that's the original design clutch master cylinder sold by JP. Has a smaller reservoir than yours but running out of clutch fluid isn't as serious as on the brakes😳 Hi Johny so does a smaller reservoir affect how the pedal feels? Link to comment Share on other sites More sharing options...
Nick Jones Posted May 13, 2019 Report Share Posted May 13, 2019 37 minutes ago, Robin said: Hi Johny so does a smaller reservoir affect how the pedal feels? No. It just holds more fluid. This is more important for disc brakes as the caliper pistons move out as the pads wear causing the fluid level to drop quite rapidly. The JP small angled reservoir is the correct one. Should be 5/8” bore. Nick Link to comment Share on other sites More sharing options...
Colin Lindsay Posted May 13, 2019 Report Share Posted May 13, 2019 Somewhere in all that I got confused and went from clutch to brakes.... but it seems to have sorted itself out despite that. Blame old age. Once I find someone old, I will. Link to comment Share on other sites More sharing options...
poppyman Posted May 13, 2019 Report Share Posted May 13, 2019 38 minutes ago, Colin Lindsay said: Blame old age. Once I find someone old, I will. Do they not have mirrors in Ireland Colin? Tony. Link to comment Share on other sites More sharing options...
Robin Posted May 14, 2019 Author Report Share Posted May 14, 2019 Hi All Thanks for all the help - one last question.... I picked up a second hand clutch MS last year - think it's a Girling. I replaced the seals and cleaned it out but when I now depress the piston using the plunger, the piston doesn't return immediately - in fact it takes an hour or so. There's no fluid in the cylinder so I wonder if this is normal until it's actually fitted and full of fluid? Or should the piston return immediately regardless of the fluid level? Thanks Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 14, 2019 Report Share Posted May 14, 2019 if its dry inside the seal will stick try adding some fluid and try again with a few strokes Pete Link to comment Share on other sites More sharing options...
dougbgt6 Posted May 14, 2019 Report Share Posted May 14, 2019 8 minutes ago, Pete Lewis said: if its dry inside the seal will stick try adding some fluid and try again with a few strokes Wrong web site again Pete! I'm back. Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 14, 2019 Report Share Posted May 14, 2019 aha! were were lacking sensible contributions welcome home Pete Link to comment Share on other sites More sharing options...
Robin Posted May 14, 2019 Author Report Share Posted May 14, 2019 2 hours ago, Pete Lewis said: if its dry inside the seal will stick try adding some fluid and try again with a few strokes Pete Hi Pete Ok will try it. So I'm assuming that if it was working correctly the piston should return to it's full extension (after it's been pushed in) straight away? Thanks Link to comment Share on other sites More sharing options...
NonMember Posted May 14, 2019 Report Share Posted May 14, 2019 For some value of "straight away", yes. The return spring is quite weak and a new seal, even when properly lubricated, exhibits some resistance. In use, there would be a return spring on the pedal and some hydraulic pressure contributing to a rapid return. When tested in isolation it may take a few seconds. Link to comment Share on other sites More sharing options...
Colin Lindsay Posted May 14, 2019 Report Share Posted May 14, 2019 13 hours ago, poppyman said: Do they not have mirrors in Ireland Colin? Tony. Only for looking behind when driving. I didn't see any point in hanging a mirror in the bathroom, so I just bought a painting of a grumpy old grey-haired so and so, and stand in front of that instead. Link to comment Share on other sites More sharing options...
Badwolf Posted May 14, 2019 Report Share Posted May 14, 2019 I've got one too!! Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 14, 2019 Report Share Posted May 14, 2019 can you get one without hair ??? pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted May 14, 2019 Report Share Posted May 14, 2019 18 minutes ago, Pete Lewis said: can you get one without hair ??? pete There he goes again. Sex, sex, sex... that's all he ever thinks about. Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 14, 2019 Report Share Posted May 14, 2019 its all down to the Pills you know like bleeding the clutch theres uppers and downers !!!! and the ones to stop me peeing down my left leg now this clutch thing ?????? whats Robin going to fit ??? Pete Link to comment Share on other sites More sharing options...
poppyman Posted May 14, 2019 Report Share Posted May 14, 2019 I do think it's these other websites you frequent Pete? Tony. Link to comment Share on other sites More sharing options...
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