Depending on how far you are driving you might not get to operating temperature. Cooling system is very efficient and over-sized on these rides. Winter fronts should be considered a requirement. The smell of coolant is most likely your heater core which is a real treat to replace.I have some concerns with the latest round of thermostats Napa sells. I too just replaced my thermostat with the exact one you mentioned. The stat is stamped with 190 but the box says 195 yet I went from being able to maintain 190 degrees to it running around 188 sometimes a bit less. The thermostat I took out was also a Napa but it was about 4 years old. I buy very few parts from Napa any more. They keep changing their suppliers out and making it harder to tell exactly what part manufacture you are getting.