TECH: Electric Fan/Stock Shroud - The 1947 - Present Chevrolet & GMC Truck Message Board Network

johnnywagon · 03-12-2008, 11:32 PM

I didn't know where to post this, but I do most my posting in the 4x4 section so here it is: For years I've ran a straight blade 16" electric fan mounted flush to my radiator w/no shroud. It worked OK but I've always had mild overheating problems when doing multiple high RPM attempts at hill-climbs, obstacles, ect.
A new radiator and water pump didn't make it better. So I had a brain storm, I've never seen this done, I'm sure it has been done but I haven't seen it.

I mounted a new 16" S-Blade electric fan inside my stock shroud with a sheet of aluminum. It was pretty easy. A card-board template, a little trimming, some minor forming with a hammer, a bunch of machine screws/bolts and......

Kinda low-tech, but it works AWESOME!!

Also it looks good enough (by accident) for a show truck IMO.

**Yukon Jack** · 03-13-2008, 12:04 AM

Looks great to me, I bet it really helps your cooling issue.

Burt4x4 · 03-13-2008, 12:40 AM

Hell ya!
nice one!
I don't think I have ever seen that

in my 9yrs on the internet

Ace in the hole · 03-13-2008, 05:53 AM

I went with this one- http://67-72chevytrucks.com/vboard/s...d.php?t=254617
Hopefully I'll find out this summer how well it works.

Nice work on yours by the way.

mudmizer · 03-13-2008, 09:08 AM

Hey John, that looks great, can't help but work.

68,69 K20 · 03-13-2008, 02:36 PM

Wow that looks great, can't say I've seen anything like that, Cool!!!!

vtblazer · 03-13-2008, 03:07 PM

Gonna make a big difference, nice work.

Now make it a two speed set up.

http://67-72chevytrucks.com/vboard/s...d.php?t=209633

johnnywagon · 03-14-2008, 01:08 AM

Thanks for all the positive feedback. That Jeep fan set-up looks even easier. The only minor challenge was that my truck was not an original 4 core truck. No big deal if you're not using a shroud. I'm sure many of us have notched the bottom core support for the bigger 4 core radiator mounts.

The problem is the shroud mounts and rests on the lower core support, now w/the thicker radiator I had to fab up a couple simple supports and get creative with the lower bolt mounts. Also I screwed a 3/4 heater hose across the bottom of the shroud to fill the gap.

I will put it to the test this weekend. Almost every 4x4 club in town is getting together for a big "play-day" at the ORV park. Should provide lots of pix for the West Coast Picture Whore....

03-12-2008, 11:32 PM	#1
johnnywagon Sofa King. We, Todd, Ed. Join Date: Oct 2006 Location: Spokane, Wa. Posts: 631	TECH: Electric Fan/Stock Shroud I didn't know where to post this, but I do most my posting in the 4x4 section so here it is: For years I've ran a straight blade 16" electric fan mounted flush to my radiator w/no shroud. It worked OK but I've always had mild overheating problems when doing multiple high RPM attempts at hill-climbs, obstacles, ect. A new radiator and water pump didn't make it better. So I had a brain storm, I've never seen this done, I'm sure it has been done but I haven't seen it. I mounted a new 16" S-Blade electric fan inside my stock shroud with a sheet of aluminum. It was pretty easy. A card-board template, a little trimming, some minor forming with a hammer, a bunch of machine screws/bolts and...... Kinda low-tech, but it works AWESOME!! Also it looks good enough (by accident) for a show truck IMO. Attached Images __________________ ~John 71 Blazer One Ton 65 Chevelle Station Wagon x2 59 Belair 2 Door 71 Chevy Open Road Van RV www.myspace.com/johnnywagon

03-13-2008, 12:04 AM	#2
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,683	Re: TECH: Electric Fan/Stock Shroud Looks great to me, I bet it really helps your cooling issue. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

03-13-2008, 12:40 AM	#3
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	Re: TECH: Electric Fan/Stock Shroud Hell ya! nice one! I don't think I have ever seen that in my 9yrs on the internet __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks Last edited by Burt4x4; 03-13-2008 at 12:41 AM.

03-13-2008, 05:53 AM	#4
Ace in the hole Registered User Join Date: Apr 2007 Location: Kalamazoo, Michigan, USA Posts: 538	Re: TECH: Electric Fan/Stock Shroud I went with this one- http://67-72chevytrucks.com/vboard/s...d.php?t=254617 Hopefully I'll find out this summer how well it works. Nice work on yours by the way. __________________ 1970 K20, 350--- SOLD 05 silverado extended cab short box- duramax Jeep wrangler unlimited Last edited by Ace in the hole; 03-13-2008 at 06:50 PM.

03-13-2008, 09:08 AM	#5
mudmizer Registered User Join Date: Jan 2007 Location: Bellingham, washington Posts: 260	Re: TECH: Electric Fan/Stock Shroud Hey John, that looks great, can't help but work. __________________ 68 4x4, 454, 4 speed, disk brakes both ends, Sold my 69 SS396 Elcamino when young & stupid

03-13-2008, 02:36 PM	#6
68,69 K20 They call me the Breeze... Join Date: Jul 2007 Location: New York Posts: 2,251	Re: TECH: Electric Fan/Stock Shroud Wow that looks great, can't say I've seen anything like that, Cool!!!! __________________ Mike 69 K20 "Beer is proof God loves us and wants us to be happy"....Ben Franklin

03-13-2008, 03:07 PM	#7
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,538	Re: TECH: Electric Fan/Stock Shroud Gonna make a big difference, nice work. Now make it a two speed set up. http://67-72chevytrucks.com/vboard/s...d.php?t=209633

03-14-2008, 01:08 AM	#8
johnnywagon Sofa King. We, Todd, Ed. Join Date: Oct 2006 Location: Spokane, Wa. Posts: 631	Re: TECH: Electric Fan/Stock Shroud Thanks for all the positive feedback. That Jeep fan set-up looks even easier. The only minor challenge was that my truck was not an original 4 core truck. No big deal if you're not using a shroud. I'm sure many of us have notched the bottom core support for the bigger 4 core radiator mounts. The problem is the shroud mounts and rests on the lower core support, now w/the thicker radiator I had to fab up a couple simple supports and get creative with the lower bolt mounts. Also I screwed a 3/4 heater hose across the bottom of the shroud to fill the gap. I will put it to the test this weekend. Almost every 4x4 club in town is getting together for a big "play-day" at the ORV park. Should provide lots of pix for the West Coast Picture Whore.... Attached Images __________________ ~John 71 Blazer One Ton 65 Chevelle Station Wagon x2 59 Belair 2 Door 71 Chevy Open Road Van RV www.myspace.com/johnnywagon



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