Hi, I replaced my thermostat today in my X reg 156 2.0 Selespeed after a few months of driving around with tepid heating and a temp guage that hardly moved!!!!. Easy job to carry out, about an hour, but what I'd like to know is what is the normal operating temperature with a new thermostat? I took it for it for a test drive and the temp guage fluctuated between 70 and 90 degrees. Is this normal as I've never seen the temp guage move this much before?. Any answers would be greatly appreciated.