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Fan blades are close to top edge of radiator trans cooler... #2562984
10/12/18 04:40 PM
10/12/18 04:40 PM
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ksat Offline OP
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ksat  Offline OP
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I've got a 26" big block aluminum radiator and I placed it into position. I can barely get a finger between the space of my viscous fan blades and the top edge of the trans cooler. Is this a normal spacing?






Re: Fan blades are close to top edge of radiator trans cooler... [Re: ksat] #2563034
10/12/18 06:10 PM
10/12/18 06:10 PM
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BcudaChris Offline
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Nope, thinner clutch necessary, or a thinner spacer. leading edged of the blades should be about half way into the shroud and I would say at least 1/2" back from the core.

Need a bit of room to get the air moving.

Can't tell from your pic, but I imagine getting the bolts in was a bear.

Re: Fan blades are close to top edge of radiator trans cooler... [Re: ksat] #2563059
10/12/18 07:28 PM
10/12/18 07:28 PM
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furious70 Offline
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with a viscous fan the clutch itself is usually the closest thing to the radiator, not the blades?


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Re: Fan blades are close to top edge of radiator trans cooler... [Re: furious70] #2563069
10/12/18 07:39 PM
10/12/18 07:39 PM
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ksat Offline OP
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The spacing from the radiator core itself seems to be fine. I've got about 1/2" of space between the clutch and core, and about 3/4" space between the blades and core.



But the space that I'm refering to is between the tip of the lowest blade and the top "shelf edge" of the rad cooler like in my first post. I can just barely squeeze a finger between the two.

Re: Fan blades are close to top edge of radiator trans cooler... [Re: ksat] #2563073
10/12/18 07:43 PM
10/12/18 07:43 PM
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furious70 Offline
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ha, I thought that was the side not the bottom, I wasn't looking at it correctly!
The radiator is sitting all the way down and flush against the support all the way? Is it to be a direct fit or just a generic one?


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Re: Fan blades are close to top edge of radiator trans cooler... [Re: furious70] #2563091
10/12/18 08:28 PM
10/12/18 08:28 PM
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ksat Offline OP
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It's sitting all the way down. It's supposed to be direct fit, but I would be interested to see what the spacing would be with a stock rad.

Re: Fan blades are close to top edge of radiator trans cooler... [Re: furious70] #2563104
10/12/18 08:53 PM
10/12/18 08:53 PM
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ksat Offline OP
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What kind of movement is to be expected with a motor? I assume if much movement it would be relative to the power it's producing?

Re: Fan blades are close to top edge of radiator trans cooler... [Re: ksat] #2563106
10/12/18 08:56 PM
10/12/18 08:56 PM
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furious70 Offline
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as the engine torques over it would raise slightly, but if you let off suddenly it'd come back down.


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Re: Fan blades are close to top edge of radiator trans cooler... [Re: ksat] #2563339
10/13/18 12:33 PM
10/13/18 12:33 PM
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Originally Posted By ksat
The spacing from the radiator core itself seems to be fine. I've got about 1/2" of space between the clutch and core, and about 3/4" space between the blades and core.



But the space that I'm refering to is between the tip of the lowest blade and the top "shelf edge" of the rad cooler like in my first post. I can just barely squeeze a finger between the two.



Not sure what the factory spacing is supposed to be to core face.....however, I would never run with only 1/2" clearance to radiator. I used to engineer fan clutches and typical "rule of thumb" was 1" to core face and 1" tip clearance to anything underhood. Once you install the shroud your fan is going to be too deeply immersed leading to poor performance of the fan. Also, the clutch will engage much too soon as it
is getting radiant heat from the core face.


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70 Charger R/T 440-4 4 speed FJ5 & white guts






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