Water Temp Gauge Reading Low

[snapper]

Since my expensive and protracted replacement of the thermostat which included the MAF, water pump and complete thermostat housing, i now have a much better running V6 MK 1, however the gauge reads low and i get the feeling that it never read high as even when the oil temp read 127 once the water temp gauge did not reach the red.

It now sits only just in the normal box and only gets to the N of normal when the oil temp gets well in to the 100 degs.

This i know is not a bad thing and since the replacement of the thermostat the oil temp is a good 10 degs lower all the time but i like to know what is happening in an engine and always have the computer on oil temp with an eye on the water temp as well.

Could this be a simple water temp sender, if so what does it look like and where is it?

If not how do i reset the ECU to move the needle more to the middle. I know from a Ford engineer that the gauges are designed to sit roughly in the middle for a large range of temps within the acceptable range so as not to alarm the owners with gauge movement, not what i would like on the kit car, i like to see 20 degs of heat dissapated before the next fast lap