Factory correct fan - The 1947 - Present Chevrolet & GMC Truck Message Board Network

coyn · 08-30-2016, 02:02 PM

Can someone help me with the factory correct fan setup for a 66 with a 283 in it? How many blades? What does it look like? How big is the spacer? My truck is missing it completely. What about the shroud?

duallyjams · 08-30-2016, 08:27 PM

I assume its a chevy and not a GMC. You can buy a after market replacement fan shroud as far as the fan goes you will have to measure the opening in the shroud as GM used a bunch of different size fan blades and for the spacer will depend on whether you have short water pump or a long water pump. Name: IMG_2255.JPG
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Name: IMG_2255.JPG
Views: 400
Size: 103.6 KB

phraza · 08-30-2016, 10:07 PM

Quote:

Originally Posted by duallyjams

I assume its a chevy and not a GMC. You can buy a after market replacement fan shroud as far as the fan goes you will have to measure the opening in the shroud as GM used a bunch of different size fan blades and for the spacer will depend on whether you have short water pump or a long water pump.Attachment 1566173

Where would one buy a shroud like that? Summit etc?

cv65 · 08-30-2016, 10:42 PM

Quote:

Originally Posted by phraza

Where would one buy a shroud like that? Summit etc?

like this one http://www.truckandcarshop.com/trucks60_72/t60_096.html

phraza · 08-30-2016, 10:50 PM

Quote:

Originally Posted by cv65

like this one http://www.truckandcarshop.com/trucks60_72/t60_096.html

Thanks!!

**Captainfab** · 08-30-2016, 11:21 PM

The pics DPowers posted show the correct original fan and shroud.

All trucks '72 and earlier originally came with short water pumps.

**DPowers** · 08-30-2016, 10:42 PM

This help any? '66 with 283 and short water pump

coyn · 08-31-2016, 06:59 AM

Quote:

Originally Posted by DPowers

This help any? '66 with 283 and short water pump

Thanks. That helps a lot.

jbgroby · 08-31-2016, 08:29 AM

I know on my 305 V-6 engines, the early models came with a smallish 4 blade fan. When I upgraded to P/S I went on the hunt for a 2 or 3 groove pulley setup and that came with a 6 bladed fan which is strange as the position of the blades not spaced evenly, but it is balanced.

TRY that with a ceiling fan........

Brad54 · 08-31-2016, 02:23 PM

Quote:

Originally Posted by jbgroby

I know on my 305 V-6 engines, the early models came with a smallish 4 blade fan. When I upgraded to P/S I went on the hunt for a 2 or 3 groove pulley setup and that came with a 6 bladed fan which is strange as the position of the blades not spaced evenly, but it is balanced.

TRY that with a ceiling fan........

Fans with more than four blades are usually (I won't say "always," because someone will find one) unevenly spaced like that. It keeps the air from "cavitating." With them unevenly spaced, it always gets a "bite" of air.
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dracko · 08-31-2016, 03:42 AM

What year is that engine? Did they have 4 or 5 blade fans from 64-66? Also sidenote, is that a 4 barrel oil bath?

LT1 Burb · 08-31-2016, 09:10 AM

Quote:

Originally Posted by dracko

What year is that engine? Did they have 4 or 5 blade fans from 64-66? Also sidenote, is that a 4 barrel oil bath?

It is a 65 283 powerglide motor, code WE, that is a 2 barrel oil bath air cleaner, do you need one. I believe it maybe the HD fan with the big radiator and shroud if ordered.

bpmcgee · 08-31-2016, 03:57 PM

The factory correct fan for a '66 with a 283 is a 4 x 17 5/8"

LT1 Burb · 08-31-2016, 09:35 PM

Quote:

Originally Posted by bpmcgee

The factory correct fan for a '66 with a 283 is a 4 x 17 5/8"

Except if you ordered the factory air option or HD radiator and it was this 5 blade fan, also you could have ordered a clutch fan in 65-66 also.

dracko · 08-31-2016, 10:23 PM

Quote:

Originally Posted by LT1 Burb

Except if you ordered the factory air option or HD radiator and it was this 5 blade fan, also you could have ordered a clutch fan in 65-66 also.

Good to know, more cooling the better. Were the clutch fans a commonly used part on Chevy vehicles in that era? Or specific to the c10's?

LT1 Burb · 08-31-2016, 11:34 PM

Quote:

Originally Posted by dracko

Good to know, more cooling the better. Were the clutch fans a commonly used part on Chevy vehicles in that era? Or specific to the c10's?

They were very uncommon on C10's and are hard to find, the clutch is unique to the trucks.

dracko · 08-31-2016, 04:03 PM

Thanks for the info LT1, Brad and McGee... I always wondered why the fan blades were uneven. LT1, thanks anyways but I'm considering running an oil bath on my quadrajet if I can find one for a 4 barrel

duallyjams · 08-31-2016, 07:20 PM

You can a repro shroud from supporting members on the forum.

dracko · 08-31-2016, 08:19 PM

Quote:

Originally Posted by duallyjams

You can a repro shroud from supporting members on the forum.

Someone on the board sells repro v8 shrouds? I am looking to buy one.

LostMy65 · 06-12-2017, 07:07 PM

I noticed on my 62 Shroud that a 19" could easily fit, but on my 65 Shroud, it looks like a maximum of 18".

stsalvage · 06-12-2017, 07:42 PM

Thats why when i was doing so much junking from 1993 until 2009.When i ran a pond fans with fan clutch.Ford dodge chevy anything i saved it.It was a pet peeve of mine so was exhaust manifolds for big block and small black car's and trucks.Most people go to electric fans.I rather have the 16-17 inch fans.You know thew Caddys Had the fan clutch but used the 15 inch fan for some of there car's.So i know what you mean I have a Ford 7 blade fan on my 1965 3/4 ton 350 / auto Power glide

08-30-2016, 02:02 PM	#1
coyn Registered User Join Date: Aug 2016 Location: Leesburg, IN Posts: 23	Factory correct fan Can someone help me with the factory correct fan setup for a 66 with a 283 in it? How many blades? What does it look like? How big is the spacer? My truck is missing it completely. What about the shroud?

08-30-2016, 08:27 PM	#2
duallyjams Registered User Join Date: May 2007 Location: Deale Md Posts: 4,663	Re: Factory correct fan I assume its a chevy and not a GMC. You can buy a after market replacement fan shroud as far as the fan goes you will have to measure the opening in the shroud as GM used a bunch of different size fan blades and for the spacer will depend on whether you have short water pump or a long water pump. __________________ James 63 GMC V6 4speed carryall 65 chevy swb bbw V8 auto 68 K20 327/4 speed, buddy buckets 2002 GMC CC Dually Duramax 64 GMC lwb 3/4 V6 4speed SOLD 66 GMC swb bbw buddy buckets SOLD IG duallyjams The only thing that stays the same is constant change!

08-30-2016, 11:21 PM	#6
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: Factory correct fan The pics DPowers posted show the correct original fan and shroud. All trucks '72 and earlier originally came with short water pumps. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

08-30-2016, 10:42 PM	#7
DPowers One foot in front of the other Join Date: Aug 2008 Location: Parrottsville, TN Posts: 5,443	Re: Factory correct fan This help any? '66 with 283 and short water pump Attached Images __________________ DP's 66 Build http://67-72chevytrucks.com/vboard/s...d.php?t=361556

08-31-2016, 08:29 AM	#9
jbgroby Registered User Join Date: Nov 2008 Location: Lacombe, LA Posts: 2,772	Re: Factory correct fan I know on my 305 V-6 engines, the early models came with a smallish 4 blade fan. When I upgraded to P/S I went on the hunt for a 2 or 3 groove pulley setup and that came with a 6 bladed fan which is strange as the position of the blades not spaced evenly, but it is balanced. TRY that with a ceiling fan........ Attached Images __________________ http://s1299.photobucket.com/user/jb...23904108567829

08-31-2016, 03:42 AM	#11
dracko Registered User Join Date: Jan 2010 Location: Regina, SK Posts: 809	Re: Factory correct fan What year is that engine? Did they have 4 or 5 blade fans from 64-66? Also sidenote, is that a 4 barrel oil bath?

08-31-2016, 03:57 PM	#13
bpmcgee Registered User Join Date: Mar 2003 Location: Northern Illinois Posts: 2,181	Re: Factory correct fan The factory correct fan for a '66 with a 283 is a 4 x 17 5/8"

08-31-2016, 04:03 PM	#17
dracko Registered User Join Date: Jan 2010 Location: Regina, SK Posts: 809	Re: Factory correct fan Thanks for the info LT1, Brad and McGee... I always wondered why the fan blades were uneven. LT1, thanks anyways but I'm considering running an oil bath on my quadrajet if I can find one for a 4 barrel

08-31-2016, 07:20 PM	#18
duallyjams Registered User Join Date: May 2007 Location: Deale Md Posts: 4,663	Re: Factory correct fan You can a repro shroud from supporting members on the forum. __________________ James 63 GMC V6 4speed carryall 65 chevy swb bbw V8 auto 68 K20 327/4 speed, buddy buckets 2002 GMC CC Dually Duramax 64 GMC lwb 3/4 V6 4speed SOLD 66 GMC swb bbw buddy buckets SOLD IG duallyjams The only thing that stays the same is constant change!

06-12-2017, 07:07 PM	#20
LostMy65 But Found Her 25yrs Later! Join Date: Oct 2010 Location: Oregon City, Oregon Posts: 10,530	Re: Factory correct fan I noticed on my 62 Shroud that a 19" could easily fit, but on my 65 Shroud, it looks like a maximum of 18". __________________ I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035

06-12-2017, 07:42 PM	#21
stsalvage Scrapper 1 Join Date: Jan 2007 Location: Riverside Calif Posts: 1,649	Re: Factory correct fan Thats why when i was doing so much junking from 1993 until 2009.When i ran a pond fans with fan clutch.Ford dodge chevy anything i saved it.It was a pet peeve of mine so was exhaust manifolds for big block and small black car's and trucks.Most people go to electric fans.I rather have the 16-17 inch fans.You know thew Caddys Had the fan clutch but used the 15 inch fan for some of there car's.So i know what you mean I have a Ford 7 blade fan on my 1965 3/4 ton 350 / auto Power glide

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