I have 2011 dodge 3500 cummins smokes when cold started? when started first thing in morning only around 0 blows lots of white smoke smell like unburnt diesel and shakes a bit for 10 to 15 min has had piston rings, injectors, head, a few head gasket all replaced already still does not start right after sitting overnight seems like cylinder six is missfiring when capped of does not smoke. does anyone have anyother ideas of the cause of all the smoke thanks

SOURCE: 2000 TDI - Lots of white smoke at cold start.

Sounds like your injection pump timing is off, an injector is leaking or a bad seal on your IP.
VW dealers have a horrible reputation when it comes to TDI's. Check out the posts over at www.tdiclub.com Those guys are very knowledgeable - and the first thing they'll tell you is don't take it to a dealer.
You can probably find someone in your area that has a copy of Vag-Com (scantool software that vw uses) software that could look at your timing. It definitely sounds like your dealer was throwing parts at your car because they didn't know what your problem is. If I were you, I'd copy and paste your post from here over at www.tdiclub.com

SOURCE: 2005 Dodge 3500 Smoke (Blow-by)

I have a 2005 dodge 3500 and i can see smoke sometimes when im driving and when i open my hood and open my oil cap while my truck is still running smoke comes out along with a little bit of oil... Do I need to change my pistons rings? What else could cause this problem...?