2006 jetta tdi dual mass flywheel

[abewall1010]

So a month ago I noticed some rattling noises on my car and I brought it to vw to get it checked out and they said the flywheel needs to be replaced and I got a buddy to replace it for me and when i came to pick the car up I started it and it sounded like there was a air leak around the flywheel area and its not a small air leak you can cleary hear it and I decided to drive it and I only drove up to 60 km but the car would shake as if it had a problem shifting............can anbody help tell what was done wrong.

[Doctle Odd]

Turbo or vacuum pipe not connected I'd say