I've noticed lately that my ultra gauge has reached 210 degrees a few times. It has always ran at a steady 203 at normal speeds and cooler when slower. I thought my thermostat may be stuck or something, but I had something odd happen this weekend.
I paid close attention to engine temps on a 2 hour drive to where I was camping. I had a lot of gear in the bed and two other people inside the cab with me. If I was cruising at 65mph at 2000 RPM, it would run 206-208 degrees. But when I was going up really steep hills running 3200 RPMS at 65-70mph, it would actually cool down to 194.
If I'm cruising on flat ground doing 45 it will hit 208 pretty regularly. I thought I may have a fan issue as well, but I don't know enough about them to say that for sure. I know the fan runs when I'm idling, that's a for sure thing.
Any ideas on what could be going on? And is it normal for the engine to cool down while having a larger load on the engine? I figured it would be the opposite.