ECT would run 178 to 182. It got to 200 going up hill.EOT would run 190 to 198. top out at 207 going up hill. When i left the house it was 34.On the flats ECT was 179-180. EOT would be 195-199. At a idle for ten minutes they both was the same (178). Truck was pluged in and the temps was around 140 before start up. going down the road it took a bit for the oil temp to catch up with the coolent temp. If the cooler was bad would the temp climb rapidly?
I bet I need a new T/STAT
. If I change the stat would it make the oil temp rise also making the cooler say it needs replaced