Here is a shocker!!!
Ill try to make this as short as I can.
I purchased a 2004 Ford 6.0 in October knowing of all the problems they have I still just love the truck. On the way home from the dealer I felt it start it stutter when it shifted into overdrive. I took it to a mechanic and my #8 injector was bad. I had him replace the injector and while he was at it I had him run 4" straight pipe from the turbo back (sounds awesome). I also had a ripped turbo boot from the turbo to the intercooler pipe which i replaced.
2 days later i took the truck on a coyote hunt about 90 miles away. When the sun came up (was about 27 degrees) I noticed that I had some white/bluish smoke coming out of the tailpipe. It did this really bad for the first day.
I took it back to the mechanic and he said it was from oil building up in the intercooler from that ripped boot and it was just burning off. I left and would notice the smoke periodically from time to time. i would seem the worst when i would drive it for a while, park it and run into the store or something and come back out and when id restart it I would get the smoke.
Now we are 3000 miles later and I dont see the smoke very often. But, if I put the truck in neutral and rev it up past 3000 rpms I will get blue smoke pretty thick and I have lost about 2 cm of coolant out of the degas bottle. I am at a loss. Is it injectors? Head gasket? Egr? Turbo seal? All of the above??
I dont smell a sweet smell out of the exhaust and the smoke is not bad. unless I do the neutral thing.