67 Fan Blades

[Ronald L.]

Re: 67 Fan Blades

Yes Picture please - could be a first to see squared rectangular tabs? Scott - What are tabs? These fans were riveted.

How many and what type of rivets are holding the fans to the hub? Possible picture?

[Ronald L.]

Re: 67 Fan Blades

Peter,
the best reference is to take what was in the year specific AIM - the GM factory assembly instructions, that they used for the entire company, and then pair that up to a GM Drawing that the supplier used to make the specific part number.

With very few exceptions - your road to restoring with correct parts will be much clearer.

Dave,
From your research were the 3789562 and 3863137 fan blades only used on 327 cars with air conditioning or all cars with air conditioning?
Thank you for all work on this topic!
Kind regards

[Scott S.]

Re: 67 Fan Blades

Like David's picture square attachments with five rivets per tab.
Scott

[Ronald L.]

Re: 67 Fan Blades

So we're clear that's the one that is 'as common as white bread' and a Chevy part not Corvette.

You might like to know that if it was "not a part sourced to be installed" in St Louis - it would have been nearly impossible for a supplier to ship the wrong part and have hundreds to thousands of them installed on an assembly line - and most importantly - get paid for the parts they shipped.

Duntov or not - lots of cars have awards that have been massaged, especially big blocks with wrong fan shrouds.

[Peter M.]

Re: 67 Fan Blades

Thanks Ron

[Patrick B.]

Re: 67 Fan Blades

[QUOTE=David Liukkonen (3775);872737]Peter,
Those 2 fans were also used on 1964-1967 Chevrolet, Chevelle, Chevry II and 1967 Camaro models with 283, 327 engines w/AC as shown in the assembly manuals and 1964-1967 Chevrolet parts catalogs. The 3863137 fan was not sold over the counter. GM # 3789562 was replaced by GM # 3931002 in May 1972 as per Chevrolet Parts History for service parts

[David L.]

Re: 67 Fan Blades

Patrick,
The 66-67 Corvettes with 427 were issued the 3888366 fan (stamped "FRONT", "H", and "66") and are 17 1/2" in dia., with a 2 1/4" pitch. The 1965 Corvette 396 fan, GM # 3872792 , is 17" in dia. with a 2 1/8" pitch and I believe that there are no stampings on it. The base fan, GM # 3770529, is 17 1/8" in dia. with a 1 5/8" pitch.
I have used a 3931002 fan (7-alum. blades, 18" dia., 2" pitch) on my 1966 w/327 without any problems and my original 3770529 fan sits in a box in my garage attic.
Dave

BTW, IMO the "66" on the 3888366 fan does not represent the last 2 digits of the GM part number, purely coincedental. It is part of the Hayes-Albion part number. I once owned a NOS 65-71 Chev. truck fan, GM # 3883159, stamped "H" and "89". The Hayes-Albion part # 148932 = GM #3883159 according to the GM Truck Vendor Conversion Book. The 3888366 number was not cross referenced because it is not a truck fan. I also had a few GM 3956684 fans (69 Z28) that were stamped "94", GM # 3956684 = Hayes-Albion # 159432 as these fans were also used on Chevrolet trucks.

[Patrick B.]

Re: 67 Fan Blades

Patrick,
The 66-67 Corvettes with 427 were issued the 3888366 fan (stamped "FRONT", "H", and "66") and are 17 1/2" in dia., with a 2 1/4" pitch. The 1965 Corvette 396 fan, GM # 3872792 , is 17" in dia. with a 2 1/8" pitch and I believe that there are no stampings on it. The base fan, GM # 3770529, is 17 1/8" in dia. with a 1 5/8" pitch.
I have used a 3931002 fan (7-alum. blades, 18" dia., 2" pitch) on my 1966 w/327 without any problems and my original 3770529 fan sits in a box in my garage attic.
Dave

BTW, IMO the "66" on the 3888366 fan does not represent the last 2 digits of the GM part number, purely coincedental. It is part of the Hayes-Albion part number. I once owned a NOS 65-71 Chev. truck fan, GM # 3883159, stamped "H" and "89". The Hayes-Albion part # 148932 = GM #3883159 according to the GM Truck Vendor Conversion Book. The 3888366 number was not cross referenced because it is not a truck fan. I also had a few GM 3956684 fans (69 Z28) that were stamped "94", GM # 3956684 = Hayes-Albion # 159432 as these fans were also used on Chevrolet trucks.

[Stephen L.]

Re: 67 Fan Blades

1967 427/390 no A/C original fan

[David L.]

Re: 67 Fan Blades

Patrick,
Fiberglass shroud for 66 w/327.
As far as I know the only fan issued to 66-67 Corvettes w/427 is the 3888366 fan. The L36 shroud shown in the 66 AIM is 19" W X 19" H.
BTW, the 3888366 fan was also used on 68-70 Corvettes w/350 engine. I found several of these fans at the Corvette Carlisle swap meets back in the 1990's.
Dave

[Ronald L.]

Re: 67 Fan Blades

David 1966 L36 L72 fan shroud "not equal to" 1967 fan shroud with same part numbers

[David L.]

Re: 67 Fan Blades

David 1966 L36 L72 fan shroud "not equal to" 1967 fan shroud with same part numbers

I don't quite know what you mean. I assume that the 67 RS shroud must have been modified slightly for clearance reasons, therefore, a part number change.
The 66 L36 shroud part numbers are 3888269 (upper), 3886887 (LS), and 3886888 (RS).
The 67 L36 shroud part numbers are 3888269 (upper), 3886887 (LS), and 3911110 (RS).
The basic dimensions are the same, 19.00" wide X 19.00" high.
Dave

[Scott S.]

Re: 67 Fan Blades

I would like to thank all of you for your comments, even if they are misguided!

[Scott S.]

Re: 67 Fan Blades

I will try to send a picture of the 1967 Fan that I have on our car.
Scott

[Ronald L.]

Re: 67 Fan Blades

David, yes - Spot On.

The Right Side piece changed significantly - clearance -- thanks for refreshing the parts numbers so even the 'misguided' are 'guided back to the GM prints'.