Coolant issues

you have an external leak that is evaporating or burning on the exhaust/ ect. Make sure you have no abnormal steam from the tail pipe like a possible head gasket issue. Also make sure there is no coolant in the oil. Greg

you have a blown head gasket, and will soon fal plugs, the reason you dont see the leak, is in short your engine is drinking the colant thats the white smoke coming out of your pipe before the engine gets hot when you first start in the morning, once the engine gets to temp the cataltic convter evaporates the leakage before it gets to the tail pipe. try blue devil head gasket repair.

I don't know