goldduster360
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- Jan 23, 2009
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I have what I think is a mopar 18" viscous fan but it will not clear my heavy duty radiator on my 73 Duster with 360 engine. The blades hit the top radiator tank. Blade pitch is 2-1/2". Part number of fan is 4140422, not the same number on the current mopar viscous package 4120758 which is I think 4140063. Fan clutch has the standard 1.5" shaft length putting the clutch 1/2 to 3/4" from radiator core.
Can anybody tell me what the blade pitch on the 4120758 package is?
Also, has anybody had the same problem and just went with a smaller diameter fan? The shroud I have is a flipped slant six unit and it fit just fine around the viscous fan I am trying to mount. The stock slant six steel fan is also around 18".
Can anybody tell me what the blade pitch on the 4120758 package is?
Also, has anybody had the same problem and just went with a smaller diameter fan? The shroud I have is a flipped slant six unit and it fit just fine around the viscous fan I am trying to mount. The stock slant six steel fan is also around 18".