When I pull my camper it gets to the very high end of the temp. still inside the normal range but almost hot. When I first got my truck it didn’t have that problem, it ran in the middle. It is a 1997 Ford F250 with a 7.5L engine.
I will assume the coolant level is full and the cooling system has no leaks.
A couple of things come to mind on this one. First the clutch fan may be getting weak and in need of replacement. It take about a hour to swap it out. Any obstruction in front of the radiator would also contribute the issue. Lastly I would want to confirm the temperature reading is accurate. It is possible that the coolant temperature sending unit is not functioning correctly.
- Clutch Fan Failing
- Radiator air flow obstructed
- Faulty coolant temperature reading
Temperature Gun
You can check the engine coolant temperature with an external infra red temperature gun. You can pick one up reasonably cheap at amazon for under $20.
Just aim it at the engine head or upper radiator hose to check the temperature.
Clutch Fan
Clutch fan can also be picked up pretty reasonable for under $40 and like i mentioned earlier, it takes about an hour to swap it out.
