i've just fitted a v6 in my astra g van. i tried the clutch the other day and the slave cylinder in the box started leaking, i just put it down to a worn cylinder and we removed the gearbox and fitted a new one and this one is leaking. i just wanted to know if there is different slave cylinders to go in the f23 for different engines. we think maybe because mine was a 2.0 dti with a dual mass flywheel and now it has a calibra turbo clutch and flywheel the slave cylinder is having to reach too far and this is making it leak. has anyone had this problem.