Torqet it at 20 ft pounds with blue lock tight. one bolt striped out.
Cooling System : Temperature Sender / Sensor
https://www.rockauto.com/en/moreinfo.php?pk=4824618&cc=1135415&pt=4748&jsn=2
https://www.rockauto.com/en/moreinfo.php?pk=10711528&cc=1135415&pt=2200&jsn=1019&jsn=1019
https://www.mishimoto.com/mazda-626-racing-thermostat-93-02.html