I have found the cause of the problem. My clutch gave out in a carpark in town today and I was immediately able to jump out and take a look. What I found was.....
There is a white oblong plastic hoop / clip on the end of the cable at the pedal end. This hoop / clip had come off the hook on the clutch pedal. A close inspection showed that there seem to have once been a metal clip inside this hoop which kept the thing in place. This was possibly the initial "snap" that we both heard / felt when it first went and the clip broke.
With nothing holding the plastic clip in place, the rigidity of the metal clutch cable is lifting the plastic clip away from the hook on the pedal. A heavy or sudden pedal action is sometimes resulting in the hook failing to catch the plastic clip and the clip "pinging" off the pedal (leaving the clutch engaged as if the cable had snapped). Because everything is tightly packed behind the pedals, raising the pedal by hand usually allows the hook to slip back into the clip (but not always as I had found out).
My "tempory" solution was to re-engage the hook and clip then attach a small cable tie around the middle of the clip. This left some free play but not enough for the hook to disengage.
Have a look at the white plastic clip on the pedal end of the clutch cable. It is so loosely attached to the pedal atm that you can prod it off with your finger with very little pressure. Try securing it in place (but not too tightly as it is a moving connection) and I bet your problem will be solved. Obviously, a proper fix would be to replace the cable and hence the damaged plastic connection.
Saturday, 11 March 2006