I've never done it yet but I would imagine it is just a couple of snap rings and seals, shouldn't be too hard. Basically just setting a bearing into a housing.
I used to rebuild lots of turbos for our trucks. Easy to do and they do not need to be balanced everything is balanced from the factory. Just be sure to pre-oil the bearings.
If it is a ball bearing Garrett you can't get a rebuild kit as far as I know... Garrett has a center section swap program where you pay 500 bucks and trade your used center section including turbine and compressor wheels in for a brand new one... Throw your oil inlet and outlet fittings and housings on it and she's as good as new. Pretty hard to beat that IMO. I used Turbos Direct in Az a couple times... Really good to deal with. Talk to Scott
