1993 300 D Turbo Install Help

[BullGator2020]

Hey Everyone,

I recently purchased a used turbo and just finished installing it. After running it, for 5 mins, all the oil in my car drain out through the exhaust. After taking back off the turbo, I could see oil behind the back turbine.

There was no oil in the front turbine or on top of the turbo. Would you say the new turbo was bad or did I install it incorrectly?

I don't see how I could have installed it incorrectly, since it is straight forward.