I have a 79 CJ with a 258 motor. It overheated pretty good. Running 60 mph when noticed. No water in oil and head Gasket seams to be fine. I replace the radiator, water pump and thermestat with a 195 deg. ALL are new parts not used. The thing runs fine. Even passed Emission (what a relieve). BUT....The temp gage says it's running hot. It rides on the "H". It ran 1/2 to 3/4 before this all happened. I think maybe the sending unit is bad. I will replace it today. Also the fan belt was replace early summer. I will replace it again as well. I know the rad is right size as a 6cyl is the same as a 8cyl. So there was only one coice. Is it possible for a sending unit to go bad??. I'm out of parts to replace. ANY input would be helpful.
THANKS Big Don
79 CJ / 98 XJ