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Old 04-08-2002, 07:47 PM   #1
Shane
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Post Stock radiator fan size for 4x4???

I know absolutely nothing about the 4x4 trucks of this era, so here is where I came looking for answers to my questions. My brother has a '71 Chevy 1/2 ton 4x4 that needs a fan. He just replaced the motor with a GM crate motor and decided to fix the cooling system where the previous owner (i think the P.O. may be related to longhornmail's dope smoking ol' man/previous owner)...the guy had "duct taped and bailing wired" a cooling system together from "who only knows" what kind of parts (radiator, short water pump,shroud and fan). He replaced the water pump, radiator and found an NOS shroud for a 4x4 truck, but now the fan that was on there is too big for the shroud???

Can anyone help us out here...need to know the diameter of a stock fan for a '71 1/2 ton 4x4. I know we can measure the opening in the shroud to find a fan that will fit, but now we are wondering if the guy sold him the correct shroud for this truck....i know i can count on the folks here.

Thanks!

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Shane
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Athens, Alabama

[This message has been edited by Shane (edited April 08, 2002).]
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Old 04-08-2002, 09:35 PM   #2
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BTTT

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Athens, Alabama

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Old 04-08-2002, 10:22 PM   #3
pickupman
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I believe it is 17 5/8"

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Old 04-09-2002, 05:21 AM   #4
JIMs70GMC
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I just replaced the fan on my 70 with a unit from flex-lite. My stock one measured 18" the fan I replaced it with was 18.25", plenty of room.

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1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs
1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX
1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears
1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now.....
1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone.
1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed.

1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm
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Old 04-09-2002, 09:45 AM   #5
chevy71super
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The stock fan on my 1971 K10 is right around 17.5 inches (difficult to get an exact measurement), the fan shroud is 20 inches even. (I know both are stock.)
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