Fan Hub/Mounting Bracket Q
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    Default Fan Hub/Mounting Bracket Q

    This is what I have:

    P/N 3911660



    Now, I would like a fan hub with the same pulley mounting and thread-on fan clutch, but one that sits a minimum of one inch higher, preferrably two inches. If it happened to center the fan over the crankshaft I would be ecstatic.

    Anyone have an idea??

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    Yours is the same style as the 1994-2002 Dodge truck. The 1989-1993 Dodge truck fan hub sits about 2" higher and more centered than yours. (I can't find a good pic of one) Plus it sits in about 1" closer to the block (take note 6BT conversion people) or maybe your looking for a high mount like mine?

    High Mount:
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    Default

    Quote Originally Posted by F350JOHN View Post
    Yours is the same style as the 1994-2002 Dodge truck. The 1989-1993 Dodge truck fan hub sits about 2" higher and more centered than yours. (I can't find a good pic of one) Plus it sits in about 1" closer to the block
    Actually this is a '91 motor from a Dodge and according to the Cummins parts catalog I have, it is correct for the application.

    Quote Originally Posted by F350JOHN View Post
    or maybe your looking for a high mount like mine?
    I like that one, but that looks like it would be a bit too high.

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    Default

    Quote Originally Posted by noibn View Post
    Actually this is a '91 motor from a Dodge and according to the Cummins parts catalog I have, it is correct for the application.
    This may be a 91 engine but the fan support you have pictured is of a 94 and later Dodge. The fan height is 203.2mm above the crankshaft centerline and off set to the fuel pump side 49.0 mm.

    The fan support for a 89-93 Dodge is 240mm above the crankshaft C/L and is centered on the crankshaft.
    NRA Life Endowment member
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    Default Pully mount

    The mount you need is #3917679 and the pulley # is 3917674. I just got these #`s off my `92 12v 6bt . The mount will center the threaded hub straight over the crank pulley, and it will be about 9 1/2 " above the center of the crankshaft. Hope this helps.
    71 vega w/ sd22 nissan diesel turbo, 5speed, 50 mpg. 70 chev suburban 4x4,60/14bolt ff,divorced 205,pto lu-4 winch,3.73 detroit locker rear, power loc front, 35s on 16.5"x12" weld wheels, 2400 allison 5speed,triple disc billet torque converter, tcm by Brayden Fleece, 8.2 Detroit fuel pincher turbo v8, 18 mpg. `94 suburban 1/2 ton 4x4, 3.42,`92 6bt, 47rh, Hx35/12cm, 4" exhaust,3200 spring.16/17mpg city, 22mpg freeway

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    Default Hub mount

    Also the distance from the block to the end of the threaded stub is 4". All you other swappers, put these measurements in your info folders!!!
    71 vega w/ sd22 nissan diesel turbo, 5speed, 50 mpg. 70 chev suburban 4x4,60/14bolt ff,divorced 205,pto lu-4 winch,3.73 detroit locker rear, power loc front, 35s on 16.5"x12" weld wheels, 2400 allison 5speed,triple disc billet torque converter, tcm by Brayden Fleece, 8.2 Detroit fuel pincher turbo v8, 18 mpg. `94 suburban 1/2 ton 4x4, 3.42,`92 6bt, 47rh, Hx35/12cm, 4" exhaust,3200 spring.16/17mpg city, 22mpg freeway

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    Default

    Here is a 1st gen fan hub ,notice the difference between the 94 -98.5 like the one you have.


    Scott
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    Quote Originally Posted by jtamulonis View Post
    The mount you need is #3917679 and the pulley # is 3917674. I just got these #`s off my `92 12v 6bt . The mount will center the threaded hub straight over the crank pulley, and it will be about 9 1/2 " above the center of the crankshaft. Hope this helps.
    Does the 3917679 use the thread on fan clutch??

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    Quote Originally Posted by CrewCab59 View Post
    Here is a 1st gen fan hub ,notice the difference between the 94 -98.5 like the one you have.


    Scott
    That looks like something that would work for me. I am guessing that the difference may be intercooled vs non-intercooled on the fan hub that I have. It is the original one and Cummins lists this number for a non-intercooled application--maybe they list a different one for the cross-flow radiator that the intercooled trucks got.

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    The fan hub that 59 posted are about 5/8's shorter the your hub that you have now. ( may help you in a tight spot)

    You can move the one you have now up to the top set of holes in the head and drill a new hole and grind a flat spot for the bolt shoulder to sit on for the lower one thats closest to the water pump side of motor.
    The one thats under the pulley can be left out,...3 will hold it
    Hay! It's ez-enuff to make them run when there still sitting in the Dodge Carcass ,...
    Get'um out and try a CONVERSION!!
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    You'll have to grind the left side a little bit to fit it.
    Hay! It's ez-enuff to make them run when there still sitting in the Dodge Carcass ,...
    Get'um out and try a CONVERSION!!
    Ford F450 ISL Conversion W/ Jake brake
    5.9 to 8.3 8.9 ISC ISL comparison
    Cummins Powered 2001 F-450 4x4 Crewcab
    Cummins Powered 1987 K-3500 4X4 Crewcab
    Free Peek at a Nice Pair!

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    Default Hub mount

    Yes, the #3917679 mount uses the thread on fan clutch. that`s what I`ve got, and I`m usin` it!
    71 vega w/ sd22 nissan diesel turbo, 5speed, 50 mpg. 70 chev suburban 4x4,60/14bolt ff,divorced 205,pto lu-4 winch,3.73 detroit locker rear, power loc front, 35s on 16.5"x12" weld wheels, 2400 allison 5speed,triple disc billet torque converter, tcm by Brayden Fleece, 8.2 Detroit fuel pincher turbo v8, 18 mpg. `94 suburban 1/2 ton 4x4, 3.42,`92 6bt, 47rh, Hx35/12cm, 4" exhaust,3200 spring.16/17mpg city, 22mpg freeway

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    Question I know this is an old thread but!

    Quote Originally Posted by F350JOHN View Post
    Yours is the same style as the 1994-2002 Dodge truck. The 1989-1993 Dodge truck fan hub sits about 2" higher and more centered than yours. (I can't find a good pic of one) Plus it sits in about 1" closer to the block (take note 6BT conversion people) or maybe your looking for a high mount like mine?

    High Mount:
    Do you still have this fan hub? I am looking for one for a 1994 6bt that I just purchased.

    Thanks, acmef150

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    acmef150, these are popular on medium duty f6/7/8 ford trucks. hi mount.
    69 Bronco 4bt/IC/HE221, NP435/203/205, 3.54 D60s OX locker F and Detroit R, military H1 beadlocks and 38" rubber
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    Thanks Bronco, one more place for me to look for this hub.

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