205 Ford Thunderbird - Overheating

What is your question?

Car overheats after 10 minutes of driving. If I stop and open the coolant fill cap, it seems to break a "vapor lock?" as I hear gurgling and then the car returns to the normal heat range. Is this a thermostat problem? There does not appear to be a coolant leak.

What makes this problem better or worse?

Nothing in particlar

How long has your 2005 Ford Thunderbird had this problem?

a few days