been there, done that brother. You'll need to remove the intercooler because the rest of the carnage is lying in wait, there.
No need to remove valve cover. Remove air assy to turbo, remove cac tubes and spyder assy, spray the **** out of the v-band clamps on the exhaust side and up pipe collector..(behind turbo). With time to soak, undo them and hit'm good with a screwdriver / crowbar..etc til they "POP". Now, undo the 2-bolts securing the turbo to pedestal. ITS REALLY THAT EASY.
Get'n to intercooler, theres a writeup somewhere, but i know you do have to remove the header panel crossmember bar, then its just a matter of vinnessing the biatch.
you might wanna get this...Riffraff Diesel: "Mechanics Parts Cabinet" Combo kit
Unless you just wanna replace the turbo pedestal orings only, then have at it, at the dealer.
I used dish soap, but really, i was more worried about the pieces of compressor wheel.