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Old July 14th, 2011, 06:32 AM   #1
Jbrd
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Default Radiator questions?

I need to replace the radiator in my wifes 86 K10 because the one in it now is not worth trying to repair anymore.
Now the old one is a 3 core and I would like to replace it with a new aluminum radiator with an electric fan.
Does anyone have some good suggestions on how many cores I would need with the an aluminum radiator?
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Old July 14th, 2011, 06:41 AM   #2
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Bigger the better! What size engine does it have in it right now?
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Old July 14th, 2011, 06:43 AM   #3
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I guess the engine size would help lol
Its a 5.7 (350)
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Old July 14th, 2011, 06:58 AM   #4
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Your gonna want at least a 3-4 core. I run a radiator from a diesel truck, it's big. My temp gauge never go's above a 1/4 on the gauge when i had my sbc in it. As far as fans you want the biggest you can fit on there. I'm running two 10" or 11" fans on mine.
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Old July 14th, 2011, 06:59 AM   #5
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i have one from a big block truck... fan attached also.. its a 3 core aluminum... pm me if intrested.
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Old July 14th, 2011, 07:13 AM   #6
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I thought the aluminum radiators were more efficient, therefore I could drop a core and go with the two core aluminum insted?
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Old July 14th, 2011, 08:36 AM   #7
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Quote:
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I thought the aluminum radiators were more efficient, therefore I could drop a core and go with the two core aluminum insted?
If you ever wanna go bigger cube's your gonna want more cooling!
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Old July 14th, 2011, 08:50 AM   #8
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I agree and should just bite the bullet now and go with the three core aluminum.
Future plans call for an LS in a couple of years.
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Old July 14th, 2011, 09:04 AM   #9
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yeah the 3 core is the way to go. the big block/diesel radiator is over kill. they are huge and they weigh a ton when full of fluid too. if you check around the standard replacement for yours is most likely a 3 core at 37" wide.
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Old July 14th, 2011, 09:29 AM   #10
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The radiator in it now is 33" wide, with three cores.
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Old July 14th, 2011, 10:32 AM   #11
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They have new aluminum rads out now, the one I had in my Suburban was a single core but the core was like 3 inches, it supposedly cooled better than a 4 core...my truck never over heated with it.
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Old July 14th, 2011, 11:50 AM   #12
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What was the name of the company?
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Old July 14th, 2011, 01:40 PM   #13
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Quote:
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What was the name of the company?
I got it from Bob's Radiator Repair in Grand Rapids, I originally took my old one in to have it repaired and it was shot.

The idea behind one thick core vs 3 or 4 smaller cores is air flows through the radiator more smoothly and has more surface area to cool, something along those lines anyway.

It was not cheap though, if I remember right it was close to $400 for the thing, it was all aluminum and no plastic. They had to order it from someplace and had it there in an hour, probably got it from NAPA or something but I think you could find one cheaper else where.
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Old July 17th, 2011, 02:49 PM   #14
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Now I am on to getting the right electric fan kit............Does anyone know how many CFM's I will be needing for proper cooloing.

Last edited by Jbrd; July 17th, 2011 at 03:05 PM.
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Old July 18th, 2011, 10:28 AM   #15
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The biggest one's that you can fit on your raditor! i'm running two fans here's what my fans setup is gonna look like..

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Old July 20th, 2011, 06:22 PM   #16
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Lookin good. What size fans will you be running?
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