ifrythings
Full Access Member
Been reading about better fan clutches or going electric and the general consensus is mechanical is the only way to go, now I have heard/read that one company (Hayden I believe) made a electro-viscous fan that would bolt to the idi but it was very expensive and I believe is no longer made.
Now lucky for us, ford has made us an almost bolt on factory option, the 6.4L powerstroke has the same standard rotation (left hand thread) fan clutch, it also has the same fan mounting diameter (5”) and the same fan bolt circle (6”), what this means is the idi fan blade will bolt to the 6.4L ps. clutch. Now the fan blade will be pushed forward (toward the radiator) by about 1/16” or less, not a big deal.
Now the differences, the bolt holes used to mount the fan are smaller (6mm) and the idi is 5/16”, this may or may not be a problem but if it is there is more then enough meat to drill out the 6mm threads and tap it to 5/16”. The other problem is the threads for attaching the clutch to the water pump, the idi is 1-1/4” x 16 and the ps is 40mm x 2.0.
Now I’m working on trying to get a used 6.4 water pump to see if we can just press off the flange and press it onto the idi’s water pump taking out any machine work needed or I’ll have to try and machine a thread adapter bushing so it can be just bolted on.
Now the other part I still need to see is if there is enough room to run the 6.4L fan behind the idi radiator, this thing is huge compared to the idi (2” bigger on each side) if it will fit without hitting the inlet and out let of the rad then a custom shroud can be made and utilize the large fan.
Now lucky for us, ford has made us an almost bolt on factory option, the 6.4L powerstroke has the same standard rotation (left hand thread) fan clutch, it also has the same fan mounting diameter (5”) and the same fan bolt circle (6”), what this means is the idi fan blade will bolt to the 6.4L ps. clutch. Now the fan blade will be pushed forward (toward the radiator) by about 1/16” or less, not a big deal.
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Now the differences, the bolt holes used to mount the fan are smaller (6mm) and the idi is 5/16”, this may or may not be a problem but if it is there is more then enough meat to drill out the 6mm threads and tap it to 5/16”. The other problem is the threads for attaching the clutch to the water pump, the idi is 1-1/4” x 16 and the ps is 40mm x 2.0.
You must be registered for see images attach
You must be registered for see images attach
Now I’m working on trying to get a used 6.4 water pump to see if we can just press off the flange and press it onto the idi’s water pump taking out any machine work needed or I’ll have to try and machine a thread adapter bushing so it can be just bolted on.
Now the other part I still need to see is if there is enough room to run the 6.4L fan behind the idi radiator, this thing is huge compared to the idi (2” bigger on each side) if it will fit without hitting the inlet and out let of the rad then a custom shroud can be made and utilize the large fan.
You must be registered for see images attach