When you install the thermostat end, when it feels tight, stop turning, i found out the hard way that the brass fitting will not accept "just a little more" & had to buy another one.
Here in TN, the winter normally isn't below freezing very much, it would have to be an emergency for me to get on the tractor if it were much colder than that to begin with.
So far, mine has been in 3 years with no problems, i'll probably disconnect of it goes out again.
Ronnie