[Socrates]

Tripower455, try a new t-stat (or no t-stat at all). I like the high flow Robert Shaw/Mr Gasket/Whoevers' name is on it now style of t-stat in Pontiac, but the generic ones worked good too, and the "best" t-stat debate runs a lot like the "best" oil debate. If you want to get academic with this, you can test the new and old stat suspended in a pan of water that you heat to a boil on the stove with a thermometer in the pan to gauge the actual open temp. You might find your 180* stat doesn't actually open until 190* or so, or, as 1967Tempest mentions, that the temp gauge in your car is not totally accurate...