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I'd check that you have a little bit of free play between the pedal and the master cylinder pushrod
as if the rod isn't allowed to fully retract home then it can build up pressure inside the cylinder as things expand with heat
Ok in that case I'd strip down the master cylinder to ensure its fully retracting as a stiff seal or broken spring can create this issue
Ok thanks for the extra information
when the issue occurs is the clutch pedal stiff or floppy?
OK then either there's air getting in the system so the clutch is then not opening or
the clutch is the wrong specification and not clearing when its all hot and expanded
I'd suggest to get it warm and then try bleeding the clutch again
If you look to the RHS of the engine, above the gearbox, you will see a light green metallic "quick fit" connector in a black plastic line. this is the clutch line. Following it down, it disappears into the gearbox and right next to where it enters, there is a stub of pipe sticking out with a bleed nipple on it - this is where you bleed it
the other possibility is that there were some faulty clutch pressure sprung plates that were too stiff / had too hard a diaphragm but as yours only occurs once hot then I'd say its not that
Ok as you say you've welded up the slave cylinder support can you post up a picture here of the slave cylinder on its bracket? you use the little paperclip icon
as I'm wondering if the slave cylinder is out of position
if it is then you could try adding some washers or spacers to move the cylinder away from the clutch a little
do you still need help?
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