[72c20customcamper]

Originally Posted by Rufas

The electric fans I replaced were Spal fans with shroud. They would kick in and I still had temp crepe. At freeway speeds the temp still increased when they kicked it. Speeds below 60 mph they worked ok. Those fans seemed to be restrictive above 60 mph.

Now with the 6 blade heavy duty fan (non flex) and no fan clutch I can cruise freeway speeds and climb hills greater than 6% and my temp stay between 179° to 185°.

My radiator is the original Harrison 4 core. It's in great shape but I'm starting to wonder if have it 'rodded' out would help. The problem is finding a radiator shop that can still do that.

The electric fans shouldn’t be coming on at highway speeds . Mine never do so with this bit more info I would say the radiator needs attention . Your fan right now being it’s not a clutch fan is “on” 100 percent of the time .

Not easy finding a radiator shop these days as with all the competition of aftermarket items and the EPA guidelines most shops closed their doors .