Originally Posted by cliffyk

It won't go to "L" with the new radiator...

As to the actual temperatures all I know is that straight up is about 210°F, and one "needle width" to the left is 190°F or so. The gauge display is non-linear, meaning that as the coolant temperature moves further outside of the normal range the needle swings faster.

This is a good thing as it will draw your attention to an abnormal situation (as your OEM gauge did) faster than would a conventional linear display--see what I mean about "it ain't broke"...

Here's the sensor output voltage and resistance for various temperatures:



I t would be simple enough to use a resistance substitution box in place of the sensor to calibrate the gauge--maybe I'll add that to my "to do" list...

Originally Posted by 96meangreengt

What would cause it to over cool in the mornings or anytime really when its been sitting long enough to cool off completly. Its stays right at the O until you hit the first stop light. (then it goes straight up and down pretty quick,is that where it should run with the 180 thermostate?

Originally Posted by cliffyk

I have assumed through this discussion that the fan is coming on as it should (at low speed at 214°F, and high speed at 228°F, and always when the AC is on and the car is traveling less than 30mph)--is this so?