V8S Clutch problem

[Steve_D]

Have you checked yet what size the master and slave cylinders are?

Had a look at one here and it has a master marked Girling70 64676310. This is a 0.7" bore.
If a larger bore cylinder has been fitted it will be giving too much travel on the slave.

Steve

[Barkychoc]

There's a well known weakness with the clutch fork where the fixed pivot punches through the clutch arm.
It may not be all the way through yet but getting there.
Armchair guess obviously.

[melv8s]

GreenV8S - exactly as you describe, press the clutch pedal 2/3rds down and it's fully disengaged. Continue to the floor and it re-engages. As you then let the pedal back up again it disengages at the 2/3rds points and re-engages as you lift further off.

[Kitchski]

I can't understand how an oversized cylinder would cause that, unless it was throwing the fingers so far in they were touching the clutch, and if that happened you'd have mashing and grinding and all sorts of unpleasant noises. Plus you got the bits from Racetech, who supply these bits over and over again. They know what they're doing.

The busted arm actually does make sense in a way, as the arm might be strong enough to disengage the clutch but if you keep pushing too far, the pivot point could open up slightly and the clutch release. It'd fail totally pretty quickly though, and I know from experience what happens when those arms fail - you just lose have the pedal travel! Plus, you say it's got a new arm fitted.

[Barkychoc]

How well does it re-engage when you push the clutch right down?
Just wondering if the release bearing is pushing the pressure plate onto the centre of the friction plate when pressing right down and applying some drive.

[melv8s]

Barkychoc - I think I would call it 'partial re-engagement'.. I think what you suggest is probably right, it's a question of why it's happening if, as Racetech say, the slave and master are definitely correct. Shortening the rod on the master would probably solve it, or a larger bore slave (which I gather is available from an early Griff). I expect I'll get there eventually. Thanks all!

[GreenV8S]

Does it have a really high biting point? That would support the theory that it is over-travelling the slave.

[phillpot]

Wonder if this ever got resolved?

[Oldred_V8S]

phillpot said:

Wonder if this ever got resolved?

You're "clutching" at straws Mike.