[72c20customcamper]

What does it creep up to? Does it overheat or just gets to say 210 ? All engines will creep up after running at speed and then stopping and idling . If it gets to hot at idle and cools at speed 40 mph or so it’s an airflow problem not a radiator problem . Location of the fan blade can effect the performance to far in or out of the shroud will greatly effect it . The fan blades should be about half way into the shroud . I would start with making sure the shroud is sealed all around the radiator air like water will follow the path of least resistance

Edit: also the head temp may be getting up there but the actual water temp may be much lower . I’ve seen my gauge go to 215+ in the head but the fans don’t kick in because the water temp hasn’t reach 195 the sensor for my fans are in the radiator next to the inlet hose