Hose came off t stat housing to head and coolant leaked out. Htemp ligh came on prob ran for 3- 5 minutes after this oil started getting milky. It passed a hydrocarbon test but the longer we ran worse it got (milky) Pulled head and put a strait edge on it and not warped enough to tell. I haven't read any body with a blown head gasket, is it possible for water to come thecrank case thru the seporator