454 Running Hot
So I just got back from my 2nd trip in my '84 Allegro. First trip was 300-miles RT in high-80 degree weather. Engine temps fluctuated but didn't enter the red zone until the last couple of mile from m...
Forum Discussion
The OEM fan clutch moves a lot of air at any speed. It is controlled by air temperature not engine temperature. If you are going 60 mpg on a flat with little load it should not come on, once you hit a hill for any length of time your speeds will drop your temps will rise and it should then come on. When the coil spring sees about 160 degrees it will lock up, when the temps drop it will free wheel. You might be thinking about the electric fan on the front of the radiator. That does not seem to make too much difference at 60 + mph but does lower the engine temps at idle and lower speeds. Some of the older fan clutches have several notches that can adjust what temperature they come on. Mine is a 1996 and only has one notch. You can also clean the spring with a tooth brush and carb cleaner to remove dirt and any grease build up which will insulate the spring and cause it to come on at a higher temperature.
