I am concerned about a possible gauge problem as, according to the gauge, the thermostat doesn't open until a temperature much higher than the 195 degrees the thermostat is rated at. How does the gauge get its input? Is it from the computer module, or is there a direct line from the coolant sensor itself? The thermostat is new, and the coolant was changed over the green type coolant quite some time ago. Thanks for everyone's help so far. It is greatly appreciated.