Radiator sizes?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bhemingson · 08-09-2020, 08:02 PM

I am working an a Jimmy but I think this applies to four wheel drive trucks as well. My Jimmy came with a radiator but it sits slightly above the rad support and doesn't fit the bottom support channels very well. It has some funky spaces on the upper retainers to make up for that.

Looking at parts books online I believe a 1972 Jimmy w/o A/C and a 350 and automatic came with a two row rad with the transmission cooler. A/C trucks came with three and four r? Or do I have a radiator out a newer truck because it sure doesn't fit.

gmc684x4 · 08-09-2020, 08:53 PM

Which rad do you have ?
2 core and 4 core have different rad support holders and rubber grommets

bhemingson · 08-09-2020, 09:24 PM

Quote:

Originally Posted by gmc684x4

Which rad do you have ?
2 core and 4 core have different rad support holders and rubber grommets

I think I have 2 core rad support holders and rubber bumpers and a 4 core radiator.

**truckster** · 08-09-2020, 09:33 PM

Quote:

Originally Posted by bhemingson

I think I have 2 core rad support holders and rubber bumpers and a 4 core radiator.

The 4 core takes a wider seat. It won't fit into the 2 core holder, so that might be why yours sits high.

**DeadheadNM** · 08-09-2020, 09:47 PM

Ill fitting aftermarket replacement maybe?

**Boog** · 08-09-2020, 09:47 PM

There have been numerous threads about this. I have a 4 row rad in mine and with the proper mounts and cushions it stood up too high still. I, and others, cut the back side of the upper and lower cushions to half thickness to lower the rad. Some made spacers to place under the top rad retainers. I thought mine due to being an aftermarket radiator for the ill fit.

bhemingson · 08-09-2020, 10:43 PM

Thanks. Does anyone repop the lower brackets? I think using a 4 core is better but I hate it sitting up. Pulled my gas tank tonight and two holes. So that's next on the list.

gmc684x4 · 08-09-2020, 11:46 PM

Gmc pauls lmc or brother's should have them

**LockDoc** · 08-10-2020, 12:43 AM

-
If your truck originally had the 2 or 3" core radiator and you are installing a 4" core with 4" core lower saddle brackets, the lip on the back of the core support will have to be bent down so that the bracket will sit down flat on the core support. If that wasn't done it will make the 4" saddle sit higher in the back.

LockDoc

gmc684x4 · 08-18-2020, 03:12 PM

Nappa should be able to help RADIATOR RETAINER SET 4-ROW # GMK4143326671S

08-09-2020, 08:02 PM	#1
bhemingson Registered User Join Date: Nov 2016 Location: Vancouver BC Posts: 162	Radiator sizes?? I am working an a Jimmy but I think this applies to four wheel drive trucks as well. My Jimmy came with a radiator but it sits slightly above the rad support and doesn't fit the bottom support channels very well. It has some funky spaces on the upper retainers to make up for that. Looking at parts books online I believe a 1972 Jimmy w/o A/C and a 350 and automatic came with a two row rad with the transmission cooler. A/C trucks came with three and four r? Or do I have a radiator out a newer truck because it sure doesn't fit.

08-09-2020, 08:53 PM	#2
gmc684x4 Registered User Join Date: Jul 2012 Location: Whitehorse yukon Posts: 1,218	Re: Radiator sizes?? Which rad do you have ? 2 core and 4 core have different rad support holders and rubber grommets

08-09-2020, 09:47 PM	#5
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,364	Re: Radiator sizes?? Ill fitting aftermarket replacement maybe? __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

08-09-2020, 09:47 PM	#6
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,190	Re: Radiator sizes?? There have been numerous threads about this. I have a 4 row rad in mine and with the proper mounts and cushions it stood up too high still. I, and others, cut the back side of the upper and lower cushions to half thickness to lower the rad. Some made spacers to place under the top rad retainers. I thought mine due to being an aftermarket radiator for the ill fit. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

08-09-2020, 10:43 PM	#7
bhemingson Registered User Join Date: Nov 2016 Location: Vancouver BC Posts: 162	Re: Radiator sizes?? Thanks. Does anyone repop the lower brackets? I think using a 4 core is better but I hate it sitting up. Pulled my gas tank tonight and two holes. So that's next on the list.

08-09-2020, 11:46 PM	#8
gmc684x4 Registered User Join Date: Jul 2012 Location: Whitehorse yukon Posts: 1,218	Re: Radiator sizes?? Gmc pauls lmc or brother's should have them

08-10-2020, 12:43 AM	#9
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,465	Re: Radiator sizes?? - If your truck originally had the 2 or 3" core radiator and you are installing a 4" core with 4" core lower saddle brackets, the lip on the back of the core support will have to be bent down so that the bracket will sit down flat on the core support. If that wasn't done it will make the 4" saddle sit higher in the back. LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

08-18-2020, 03:12 PM	#10
gmc684x4 Registered User Join Date: Jul 2012 Location: Whitehorse yukon Posts: 1,218	Re: Radiator sizes?? Nappa should be able to help RADIATOR RETAINER SET 4-ROW # GMK4143326671S



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