Posted by Don in Missouri [12.206.185.66] on Wednesday, April 15, 2015 at 09:12:07 :
In Reply to: high-mount fan posted by Don in Missouri [12.206.185.66] on Wednesday, April 15, 2015 at 08:58:37 :
I eliminated the fan hub with this setup I built for an AC mount. You can see the trapezoidal bolt pattern where the fan hub used to be.
This setup is now in the Wagoneer and working. I have been bragging that the belt tensioner does not jump around like on most 4bts. By luck, I must have found a better angle for the tensioner than the OEM configuration.
I use an electric fan on the Wagoneer and it works well. I have plenty of room for a belt-driven fan, but the electric fan works better. With the stock radiator from the 360, I have excess cooling capacity for the 4bt. The electric fan is thermostatically controlled and hardly ever kicks on.
I'm convinced an electric fan and a parallel flow AC condenser is the way to make an AC system work really well. The fan is wired into the AC switch, so it pushed air over the condenser whenever the AC is running. I discovered this solution on my crewcab. The fan clutch is too far away from the AC condenser. When you're idling in traffic the engine may not be putting heat into the radiator and so the fan clutch never gets the signal to move air across the condenser. With an electric fan, I can move air across the condenser to make the AC work even when it is not needed to cool the engine. This was a minor oversight in first -gen engineering, perhaps because gas motors are usually wasting more heat to the radiator than the diesel at idle?