Hi i have just done a clutch replacement on my evo and have went to bleed it and only air is coming through. so i swapped the slave cylinder over and still same thing? I can't see any leaks from the slave or master cylinder. could this be the master cylinder?

 

there are two chambers in the mc, one does the clutch, make sure both have fluid when you pull cap off. Also check the floor board--it has to be going somewhere or you don't have any fluid in the system.