Clutch Gone maybe

[Darrens]

Have a 400 Chimaera, the clutch slips only when the car has been left for awhile (overnight), there is a slight bit of oil where the engine and gearbox meet. Anybody ideas which is most likely, Crank seal or gearbox or is it to be the actual clutch

Anyhelp appreciated

Darren

[Corin Denton]

There is a core plug at the rear of the engine that is prone to failure , cost is around 80p , the only problem is that I think you have to split the engine and box to access it.