CCV question

[afstud]

Greetings All, Let me just start out by saying Im not new to the CCV system since ive replaced a few already and ive owned E46s E39s etc. but im a little stumped. So my E53 M54 engine is at about 197k miles, but the CCV replacment history is unknown. Ive been having random start ups of slight blue/white smoke, it doesnt last more than a second on start up. but it doesnt happen all the time, maybe every other or 3rd start. but it just started happening when it was Super cold last week. I presume the CCV is clogged or going to hell. I already ordered a new system with every washer etc and even a new Dipstick tube. Ive also noticed black soot on the back of the car which is probably coming from the exhaust. this also leads me to believe that its the CCV being clogged. Car runs and drives perfect. just need a second opinion.