Cooling issue, but this time it's to cold...

PhillH said
Guys , I tested my old thermostat, my new thermostat, I did this on the stove, with a thermometer, they both functioned perfectly, they both open when specified and they both close all the way. I installed the new one. I tested my new Sunpro mechanical temp dash gauge against a thermometer in the radiator, they both read the same. All that checks out.

What brand thermostat? Yes they will open and close on the stove, doesn't mean it's closing all the way, especially with a little pressure behind it. I went through he same thing with my 318 Dakota and 3.3 chrysler mini van, unless you get a GOOD thermostat, they tend to hang open. WIch is fine until it cools
Off.