I had the gasket replaced in my 1986 Corolla SR5 2 years ago. Probably driven 3,000 miles since the replacement. I'm now losing coolant. The car has not overheated. The heater works fine. Can't see a leak anywhere. Let the car run, looked underneath, nothing. No white exhaust. Slight odd odor when car runs. Thinking it may be the head gasket but is that possible so soon after replacement?
Are there any other possibilities I haven't thought of?