Temp gauge wont move until over 110 degrees or something. You wouldn't know unless you have an aftermarket gauge.
It will still go at speed. I was towing a trailer when mine started. I have my MADMAN gauge set very low at 95 degrees. The alarm very rarely goes off but when it does, there is usually a reason of heavy accelleration or something. On this occasion, I hadn't done anything, just running along at 100km/h on cruise control and it went in to alarm. I knew something was up but didn't know what. As soon as I slowed I found the rough running. I limped into mobile range and started a urgent help thread on here and it was with help from members on here, I found the problem. First thoughts were fuel pump but I was sure the miss was only on one cylinder. Not a good problem when it's night time in a strange outback country town.
Happy Days.

