[rotorwrench]

Constant coolant loss is the first signs that coolant (some water) is going somewhere. A head gasket can leak when cold and close up after warm up expands the metal involved. Re-torquing the heads isn't a bad idea. Flatheads are infamous for stuff like this. On cool morning a white smoke for a very short period is normal. During a hot afternoon not so much. If it smokes white all the time no good.