Quote Originally Posted by blueguy View Post
The difference in operating temp is based on the rating of the t-stat + 10-15*.
My 160*'s always ran around 175~ based on my Aeroforce readings and a new temp sensor.
180*'s normally sat around stock rated temp...but my 195*'s would see nearly 200*, easy.
I'd venture to say you should just install a new 180* and have the system totally flushed and gone through if you haven't done that yet.
I am going to hook up an Aeroforce to see what coolant temperatures I am getting.
I have some high miles on this GP GT, there are no go fast mods on it. I just want to get as much heat inside the car as I can, so that's why I decided to go back to the 195° thermostat. I did not drive this car much in the wintertime in past years. After driving in single digit temps the past few weeks, the interior temps are not that comfy. I have to keep the fan on 3 or 4 setting to keep the windows clear from frost.
I also have flushed out the cooling system, and installed new radiator hoses. It is going to eventually need a LIM gasket on down the road, and when I install one of those, I will replace the coolant.
Also, there are many other 3800 owners who claim that there is no need to go with a 180° stat, as there is nothing to be gained. The may be a gain in fuel mileage by going with the stock 195° thermostat according to many.
I just did not expect to encounter a problem by reinstalling the 195° thermostat, and I want to figure out why.
Thanks for responding.