I live in Westchester, NY and would like to learn more about your valve stem service.
It's a 2006 x5 4.4i with ~86K miles. I've owned the car approximately 10 months. A few months ago, the smoking problem appeared. The crank case ventilators were replaced last week, but the smoking persists.
Blueish smoke, only after idling (i.e. pulling away from a stop sign, stop-go traffic, etc.)
Can you please PM me if you are interested?