I noticed something on my Justa. After I did a PCV replacement I notice that every time I start the car white smoke comes out from the tail pipe. The smoke is not too much but not as much before I did the PCV replacement. After driving for a minute or two the smoke disappears. I only notice this after a cold start. Any idea why is this now happening?

 

If the car is still performing as it should and you aren't seeing fluids mixing I wouldn't worry too much, probably just condensation.

 

White smoke is water vapor and as nkfry says is nothing to worry about. It's likely this was happening before the PCV and you didn't notice.

Blue smoke is oil. Blue smoke on startup is traditionally valve guide wear.