The temp gauge has been really steady , right in the middle , and hasnt budged.
I have only had this truck for about 1 month .
its a 2003 with maybe 90,000 . Looks mostly original , but who knows.
i have driven it all over , in lots of traffic, and different stituations, and no overheating problems.
But then , I decide to take a quick trip on the highway. not far really , it was gonna be a 1/2 hour drive .
Well 10 mins on the road and the temp needle shoots up to H ! ! ! ! all the way hot .
Once I notice , I start pullin off the road and , rev the engine , and it starts dropping back down.
After that , it maintained near half way , but a little above and it tried to creep upwards, and then it would shoot up all the way again .
after I stopped off somewhere , and let it cool , and then drive it again it maintained normal temperature...
there appears to be enough water/coolant.
I dont know what might have been replaced or not ...
What would most likely be the problem here??
I figure the tstat , but could it be somethig more ?