Vitesse Clutch Master Cylinder

[Straight Six]

A while back I replaced the original clutch master cylinder for a new item from a Triumph supplier. Do new replacements have a different bore size than the originals? Ever since then the clutch biting point has been very, very low, so you hardly have to move your foot off the clutch before the car starts moving.

Not a huge fault, admittedly, but I'd rather have it the way it was, Also, whenever my girl friend drives the car she ends up kangarooing down the road which is embarrassing for her and obviously, makes me cringe!

[Clive]

should be same, .625 (or 5/8) from memory. Sounds like air in the hydraulics, try rebleeding and also the length of the rod from the pedal to the cylinder, and that the piston inside the cylinder is returning fully. As a start! Oh, and is the clevis pin and associated holes all in good nick.


Clive

[Smallfry]

And maybe she is just a crap driver ?

[heraldcoupe]

It "should" be 5/8" bore, but there are plenty of near identical units with different bores. See what it says on the cylinder casting. I suspect there is actually air in the system, but worth eliminating the obvious first,
Cheers,
Bill.

[Straight Six]

Thanks for the replies!

I have bled the system to within an inch of it's life, and checked that niether the master or slave cylinders are leaking (I fitted new rubbers to the slave) so will check the casting.

[Clive]

watch the slave cylinder as the pedal is pressed. Does it move straight away etc. If there is a problem with the hydraulics it will be obvious. Otherwise it may be clutch related?

Clive

[gilesdive]

If  the slave cylinder has been fitted incorrectly, the bleed nipple might not be at the top. That way when you try to bleed it, you will never get all the air out (because the air will always be at the top).

[Straight Six]

I'll also check that, as I didn't realise the slave cylinder had a right and wrong way up there is a 50% chance that could be the problem!

[martin]

when u have bleed the clutch wedge the pedel down, with a brush handle and leave it overnight.
makes all the air come back to the master cylinder, makes a major difference.