Four radiator swap now fan shroud doesn't fit - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72GMCDD · 06-13-2011, 12:02 AM

Wanting to see if anyone has ran into this or have a solution. I have a 72 gmc long bed with a 350 the owner before me installed a four core radiator and didn't install a shroud. Went to install the new shroud and the lower part of the shroud is about an inche off from the mounting holes. Does the core support have to been changed or do you have to modify the core support to allow it to fit?

Thank you

Donnie
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eagleuh1 · 06-13-2011, 12:34 AM

On my 68 there was a metal c channel spacer that went between radiator and shroud. It was about 3/4 wide. 4 core radiator as well. Don't know if thats what your asking though.

BlackTopMotors · 06-13-2011, 12:35 AM

I know this isn't a permanent/best solution but you can run some heavy duty cable ties and sinch em up tight if you need too get by.

cwgreen1971 · 06-13-2011, 02:03 AM

I just put one on today and had the same problem, I was going to use spacers but instead just put some J nuts on the bottom of the core support and pushed it back tight and bolted it. Worked out just fine...

72GMCDD · 06-13-2011, 09:08 AM

Thanks for the ideas this gets me pointed in the right direction!
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**Boog** · 06-13-2011, 10:00 AM

The core support accepts 2,3 & 4 core radiators. The upper and lower brackets and insulators are different. I have seen 4 row radiator shrouds listed. I have a 4 row rad in my 69 and the shroud I have has about a 3/4" gap between the mounting pads and the brackets. As mentioned you can use zip ties for temporary as I have. Fab up some 3/4" spacers to mount it more solidly is a better idea. Cheaper than a new 4 row shroud if you can find one.

Thealien · 06-13-2011, 10:25 AM

there are some clips on my 4 core that clip onto the support and hold the bottom of the shroud. Mine is a 4x4 but
i think the clips are the same??

they are factory clips btw

chewychevy67 · 06-13-2011, 05:02 PM

My 67 2wd had a 4 core rad and this is what was in between the rad support and the shroud. It is stamped very nice so it must be factory. I have seen the ones with the clips to.

**Boog** · 06-13-2011, 05:20 PM

I don't know that i've ever seen one of those.

**FirstOwner69** · 06-13-2011, 06:31 PM

I just took the shroud off my '69 and a junker. Both had clips as well as a couple others in the junkyard. However, the '71s and '72s in the junkyard had different shrouds. I don't recall if they used the clips. I just bought some of these http://www.classicindustries.com/truck/parts/17117.html

eagleuh1 · 06-15-2011, 08:12 AM

ChewyChevy67, thats the spacer that I was talking about. Thats exactly whats on my 68.

71meangreenc10 · 06-15-2011, 08:33 AM

My 71 has the clips and its a heavy duty radiator.

Smitty

ChevLoRay · 06-15-2011, 10:00 AM

My original radiator and the replacement are both 4-row core radiators. The original shroud fit both without any issues, but two of the tabs on the shroud will have to be repaired to make it whole.

Seems there are different shrouds based on engine size and with/without AC. Anybody else know?

**Boog** · 06-15-2011, 10:09 AM

There were/are several different shrouds for our trucks. A quick check of Classic Parts lists 4.
Standard radiator, small block
HD radiator, small block
4wd radiator, small block
Big block

I'll check LMC later.
I have a 4 row in mine and a standard shroud will not bolt up. There is that 3/4" gap between the rad and the mounting ears of the shroud we've been talking about. A couple of guys have a factory looking spacer that came on theirs.

On page 117 of the LMC catalog you'll find the shrouds listed the same way as Classic Parts. Also note there are no spacers shown like the one above.
Could those above be from an aftermarket conversion maybe?

06-13-2011, 12:02 AM	#1
72GMCDD Registered User Join Date: Jun 2011 Location: Rhome, TX Posts: 12	Four radiator swap now fan shroud doesn't fit Wanting to see if anyone has ran into this or have a solution. I have a 72 gmc long bed with a 350 the owner before me installed a four core radiator and didn't install a shroud. Went to install the new shroud and the lower part of the shroud is about an inche off from the mounting holes. Does the core support have to been changed or do you have to modify the core support to allow it to fit? Thank you Donnie Posted via Mobile Device

06-13-2011, 12:34 AM	#2
eagleuh1 Registered User Join Date: Jul 2009 Location: Russellville, Arkansas Posts: 1,699	Re: Four radiator swap now fan shroud doesn't fit On my 68 there was a metal c channel spacer that went between radiator and shroud. It was about 3/4 wide. 4 core radiator as well. Don't know if thats what your asking though.

06-13-2011, 12:35 AM	#3
BlackTopMotors Registered User Join Date: Jul 2010 Location: Valencia, CA Posts: 364	Re: Four radiator swap now fan shroud doesn't fit I know this isn't a permanent/best solution but you can run some heavy duty cable ties and sinch em up tight if you need too get by.

06-13-2011, 02:03 AM	#4
cwgreen1971 cwgreen1971 Join Date: Aug 2008 Location: Battle Creek MI Posts: 185	Re: Four radiator swap now fan shroud doesn't fit I just put one on today and had the same problem, I was going to use spacers but instead just put some J nuts on the bottom of the core support and pushed it back tight and bolted it. Worked out just fine...

06-13-2011, 09:08 AM	#5
72GMCDD Registered User Join Date: Jun 2011 Location: Rhome, TX Posts: 12	Re: Four radiator swap now fan shroud doesn't fit Thanks for the ideas this gets me pointed in the right direction! Posted via Mobile Device

06-13-2011, 10:00 AM	#6
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,122	Re: Four radiator swap now fan shroud doesn't fit The core support accepts 2,3 & 4 core radiators. The upper and lower brackets and insulators are different. I have seen 4 row radiator shrouds listed. I have a 4 row rad in my 69 and the shroud I have has about a 3/4" gap between the mounting pads and the brackets. As mentioned you can use zip ties for temporary as I have. Fab up some 3/4" spacers to mount it more solidly is a better idea. Cheaper than a new 4 row shroud if you can find one. __________________ 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

06-13-2011, 10:25 AM	#7
Thealien Senior Member Join Date: Jun 2007 Location: Pine Ridge Florida Posts: 4,122	Re: Four radiator swap now fan shroud doesn't fit there are some clips on my 4 core that clip onto the support and hold the bottom of the shroud. Mine is a 4x4 but i think the clips are the same?? they are factory clips btw __________________ Click on my Not really a build thread, yet NOT SO RUST FREE RUST FREE BLAZER LS ENGINE SWAP INFORMATION THREAD BOLT RESTORATIONS 4l60 to an NP205

06-13-2011, 05:02 PM	#8
chewychevy67 Registered User Join Date: Jan 2010 Location: Here Posts: 5,454	Re: Four radiator swap now fan shroud doesn't fit My 67 2wd had a 4 core rad and this is what was in between the rad support and the shroud. It is stamped very nice so it must be factory. I have seen the ones with the clips to. Attached Images

06-13-2011, 05:20 PM	#9
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,122	Re: Four radiator swap now fan shroud doesn't fit I don't know that i've ever seen one of those. __________________ 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

06-13-2011, 06:31 PM	#10
FirstOwner69 Senior Member Join Date: May 2010 Location: Wisconsin & Arizona Posts: 4,843	Re: Four radiator swap now fan shroud doesn't fit I just took the shroud off my '69 and a junker. Both had clips as well as a couple others in the junkyard. However, the '71s and '72s in the junkyard had different shrouds. I don't recall if they used the clips. I just bought some of these http://www.classicindustries.com/truck/parts/17117.html

06-15-2011, 08:12 AM	#11
eagleuh1 Registered User Join Date: Jul 2009 Location: Russellville, Arkansas Posts: 1,699	Re: Four radiator swap now fan shroud doesn't fit ChewyChevy67, thats the spacer that I was talking about. Thats exactly whats on my 68.

06-15-2011, 08:33 AM	#12
71meangreenc10 Its a Truck Thing...... Join Date: Dec 2004 Location: Sierra Vista, Arizona Posts: 3,159	Re: Four radiator swap now fan shroud doesn't fit My 71 has the clips and its a heavy duty radiator. Smitty __________________ 71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 71 C20 Longhorn/Ole Yellor 69 C30 Former Motor Home, Flat Bed time

06-15-2011, 10:00 AM	#13
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: Four radiator swap now fan shroud doesn't fit My original radiator and the replacement are both 4-row core radiators. The original shroud fit both without any issues, but two of the tabs on the shroud will have to be repaired to make it whole. Seems there are different shrouds based on engine size and with/without AC. Anybody else know? __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

06-15-2011, 10:09 AM	#14
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,122	Re: Four radiator swap now fan shroud doesn't fit There were/are several different shrouds for our trucks. A quick check of Classic Parts lists 4. Standard radiator, small block HD radiator, small block 4wd radiator, small block Big block I'll check LMC later. I have a 4 row in mine and a standard shroud will not bolt up. There is that 3/4" gap between the rad and the mounting ears of the shroud we've been talking about. A couple of guys have a factory looking spacer that came on theirs. On page 117 of the LMC catalog you'll find the shrouds listed the same way as Classic Parts. Also note there are no spacers shown like the one above. Could those above be from an aftermarket conversion maybe? __________________ 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 Last edited by Boog; 06-15-2011 at 10:54 AM.



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