Fellas, we are having our first freeze tonight in Northwest Iowa. I started to winterize the boat last night, but ran out of sunlight to get done. I have everything done except letting the water out behind the thermostat. The bottom nut is hard to get at with a 12 mm wrench and it seems like I am just going to stripe the nut. I was wondering how serious the drainage of the thermostat is with this Toyota? Any info would be great. Thanks