Saw this Engine Block/Head Temperature Alarm/ENGINE WATCHDOG TM2 (eBay item 130470332863 end time 30-Jan-11 22:30:53 AEDST) : Cars, Bikes, Boats and wondered if anybody had one on their truck. It makes sense to me. The cummins at work wont register overheating on the gauge when they run dry or something. Not my ad btw.

 

Ive gotten mine HOT before in the epic heat of summer when my radiator was plugged with mud
At the time the Quadzilla ADR wouldnt read above 202*. They have since fixed that and I can set an alarm on temp.
However if you dont have a tuner with alarms that looks like a nice unit. The hard part will be finding a place to bolt that probe!! A lot of bolt locations are thick steel areas and probably wouldnt show actual engine temp. Just a thought