car was running fine.woke up next day warmed up car and could not put it into gear and clutch pedal has no pressure.realised clutch fluid cyclinder was empty.refilled it went strait into gear.drove for few hours . parked up then went to start few hours later doing same thing.wont go into gear but cylinder is full???no pressure on pedal

 

Replace the master cylinder, slave cylinder and flex hose.

 

I agree. The problem is most likely related to one of those items, but tracking down exactly which one is not worth the trouble. Change all three at the same time...



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+2

 

+3, just had to do this whole bit on the '83.

Mario III

 

you either have a leak in the line... best bet is to just replace the master and slave cylinder with steel braded line

 

As 4 people have already pointed out.

 

just as aaron say replace those parts i had the same thing happen and just replaced them to easy of a job. buy new stuff so you dont have to worry about it failing again.