New rebuild has odd vapors?

If you were to follow post number 37 to the T, I think you could gain a lot of knowledge about your motor quickly! LOL
I think the results of such a test would be two thumbs up or two thumbs down no in-between.
A serious note though if there's no water in the oil and no oil in the water and no extremely concerning Ping's Knocks or any of those other horrible noises you're fine. And if it's a tick that goes away that's fine. If it's a tick that gets louder, turn it off quick!