GM flex-fan.
Race Director
Joined: Nov 2002
Posts: 12,142
Likes: 54
From: Taylor Michigan
You have read correct...No flex fans, only thermostatic clutch fans are used...You can buy one at any parts store either the thermo or centrifugal {cheaper}.....Recalling brands, there is 4 Seasons ,or Everco....Both are premium quality
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Melting Slicks
Joined: Jan 2012
Posts: 3,033
Likes: 503
From: myrtle beach sc
Army
Wally, that is the reason that I posted this. To inform people. GM did not install a flex-fan at the factory. They came out with this fan in 1973 to help big blocks cool. You had to buy it over the counter at a dealership. I read about this GM issue fan in a cool article in, I think, Motor Trend Magazine. I was having cooling issues and I had had an aluminum flex fan that was way too noisy, when I cranked my L-79 up to 6,000 rpm! This fan has stainless steel fins, I think. It has a GM number and a date code. Lou.
Last edited by loup68; Sep 21, 2014 at 08:24 PM.
Melting Slicks
Joined: Jan 2004
Posts: 3,245
Likes: 210
From: Detroit MI
Is it really a "flex-fan", or simply a direct drive fan? My dad had a GM direct drive fan (four blade I think) on his car for a long time, but there was nothing "flexible" about that fan. And yes, it was noisy as hell!
Thread Starter
Melting Slicks
Joined: Jan 2012
Posts: 3,033
Likes: 503
From: myrtle beach sc
Army
Yes, It is a real flex-fan. You can bend the blades. For anyone that cares, the GM part number is 6260478. The center hole is 5/8" and it has the larger ( 2 1/8" ) pump bolt spacing. I had to drill new holes for it to fit on my smaller 1 3/4" bolt circle. I will try to post some pictures tomorrow. I wish it was easier to post pictures on this forum. Everyone isn't a tech wizard! Most of the guy's that I worked with in my automotive parts plant , for 34 years until it closed in 2007, in maintenance and my age, would not even TOUCH a computer!!! Lou.
Last edited by loup68; Sep 22, 2014 at 08:07 PM.
Burning Brakes
Joined: Mar 2006
Posts: 1,036
Likes: 2
From: Huntingburg Indiana
Not a vette, but my 1978 Chevy truck came with a factory flex fan. About 10 years ago I got a "recall" notice from GM in the mail. They did not replace it, just basically said that I should replace the fan because the blades can crack. A few months later a blade broke off and put a nice dent in my fender.
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
A few decades ago I pulled a junkyard GM Flex fan off some car, I want to say a Caddy, and put it on one of my Pontiacs, and about 3? years later I noticed the blades cracking.....so put on a direct drive steel fan.....I can't remember which Poncho it was, just the shock of the stainless looking silver blades being cracked.....
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Thread Starter
Melting Slicks
Joined: Jan 2012
Posts: 3,033
Likes: 503
From: myrtle beach sc
Army
You are welcome, Mike. I kept reading, emphatically, that GM never made one, but I knew I had one! I know that they were meant for low revving big blocks, but I use to take it up to 6,300 rpm with my L-79. I just installed a new Dewitt's aluminum radiator into my 68 coupe, and I went to clean this fan and found the one fin cracked half way across. I am really glad that I just did not slap it back into the car. You really can't see much with the shroud on. Lou.
Drifting
Joined: Jul 2004
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From: Kissimmee fl
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[QUOTE=loup68;1587888266 I will try to post some pictures tomorrow. I wish it was easier to post pictures on this forum. Everyone isn't a tech wizard! Lou.[/QUOTE]
I do not know when things changed, but the last few times I have posted pics, I was able to do it directly from my computer. Just like posting in an e-mail.
When you click on the reply icon and the reply box opens up, across the top of that box are some tools. The fifth one from the right is the "insert picture" icon. Click it and it will open up a window to upload pictures. Select the pictures from your computer to insert, and you are done.
I too have been using Photobucket for years to upload pics and tried this recently and it worked.
I do not know when things changed, but the last few times I have posted pics, I was able to do it directly from my computer. Just like posting in an e-mail.
When you click on the reply icon and the reply box opens up, across the top of that box are some tools. The fifth one from the right is the "insert picture" icon. Click it and it will open up a window to upload pictures. Select the pictures from your computer to insert, and you are done.
I too have been using Photobucket for years to upload pics and tried this recently and it worked.
Thread Starter
Melting Slicks
Joined: Jan 2012
Posts: 3,033
Likes: 503
From: myrtle beach sc
Army
c69vete, You are right, my tech wife helped me post the photos and it was a hundred times easier this time. She just got windows 8 on her monster, gaming computer and I have 7. Our new, wonderful windows phones let us input the photos from my phone directly into her windows 8. We tried it on my computer with windows 7 and it did not work, she had to transfer the photos, using a smart stick to put it into my computer. Lou.