2013 dd16 oil out exhaust side of turbo ?

Bought a used truck has dd16 Detroit low hour rebuilt motor .. driving home in a foot of slush minus 1, air started to freeze up pulled in pullout and I could smell something burning ,seen smoke and oil comming out the flex pipe clamp behind turbo..well I was putting safety brake in tanks it cleared up ..no more smoke out of behind turbo.. possible turbo?...cracked ring? Drove it home 300 kms after that no more smoke or oil..anyone seen this before thanks