You're doing fine. Listen, the only way to properly test a thermostat is to remove it and place it in boiling water to see if it opens fully. As far as the smoke, check the water pump. Behind the pulley you should find a small round hole. It is called a weep hole. If the bearing or seal in the pump, coolant will leak from there and you will see steam.
Let me know what you find.
Wednesday, September 3rd, 2014 AT 8:27 PM