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Originally Posted by 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
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The fan shroud is tight fitting around the radiator. The fan is slightly to far into the shroud opening. But because of the supercharger pulley and belt I can't move the fan out any. The fan is less than 1/4 inch from pulley and belt.
You make a good point about sensor location. The high temp I'm worried about is the head temp. So far 215° has been the highest temp, but the outside temp was only 77°. The radiator inlet temp was just under 200°. What concerns me is the summer time temps here typically approach 120°. Most days temp hover around 115°. So I can imagine this condition will get worse.