I changed my 180 Tstat to the 195 for the winter. I found that for just changing the t-stat, get a siphon hose and suck out about 1/2 Gallon out of the Radiator. That way when you take off the t-stat, you don't get coolant everywhere.

That is of course if you use the current coolant and you are not doing a complete flush.

 

Oorah Staff Sergeant