Fan Shroud ID - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Solver · 06-05-2009, 11:31 PM

How can I tell the difference between a v6 or a Big block fan shroud. Can't find any numbers on it .
Thanks

Livrat · 06-06-2009, 12:17 AM

One way is to measure the distance between the upper mount bolt holes.. the Big block one is the same width as a small block.. the V6 one is approx 2 inches narrower.

there is a part number on them but usually hard to read.. its on the face of the lip on the round part of the shroud, towards the engine.

**Classic Bowties** · 06-06-2009, 03:34 AM

Quote:

Originally Posted by Solver

How can I tell the difference between a v6 or a Big block fan shroud. Can't find any numbers on it .
Thanks

Like Livrat already said above, the p/n should be molded into the outer lip of the shroud (area circled in blue). The p/n 3924932 is the correct for 396/402 V-8's, and the V-6 shrouds have the p/n 3903752 molded in the same location.

06-05-2009, 11:31 PM	#1
Solver Registered User Join Date: May 2000 Location: Storm Lake, Ia Posts: 1,449	Fan Shroud ID How can I tell the difference between a v6 or a Big block fan shroud. Can't find any numbers on it . Thanks __________________ 1972 Cheyenne Super 20 LWB-Blue 1972 Cheyenne Super 10 LWB-Black 1972 Cheyenne Super 10 LWB-Red 1972 Cheyenne Super 10 LWB-green 1972 GMC 4x4 LWB-White 1971 Cheyenne 10 LWB-Ochre 1971 Cheyenne 20 Longhorn-Copper 1971 Cheyenne 20 Longhorn-Black 1969 Custom 10 LWB-lt blue 1968 GMC 3/4 ton-green 1968 1/2 ton swb stepside-silver 1967 Chevrolet CST 10 LWB-green 1967 Chevrolet custom 20 LWB-Maroon

06-06-2009, 12:17 AM	#2
Livrat Member #1049 Join Date: Jun 2000 Location: Troy Montana Posts: 3,940	Re: Fan Shroud ID One way is to measure the distance between the upper mount bolt holes.. the Big block one is the same width as a small block.. the V6 one is approx 2 inches narrower. there is a part number on them but usually hard to read.. its on the face of the lip on the round part of the shroud, towards the engine.

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