Turbo's Leaking

[HiImBrian]

rtv

[munchgsx]

Sorry about the picture that is the leak I was having trouble with before. Alittle copper spray and it seal right up. The problem I have now is when I pressuize it, it will blow air into the center cartridge. Which means the shaft seal is leaking. My question is can some blowbye be tolerated, and does the turbo being dry right now contribute to it leaking? Also this turbo does not smoke.

Nick