Been noticing coolant disappearing and I tracked it down today. When I get on it my inlet heater core hose blows coolant out where it meets the heater core. I haven't readjusted it yet but I'm curious if this is a sign of a bad head gasket? My coolant is also a suspicious color, but I can't tell if it's rust or oil. My oil level hasn't dropped and my oil looks clean. I plan on compression testing and checking the coolant pressure Monday. Just wanted some opinions.