The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 04-17-2017, 11:59 PM   #1
KyleSeal
Senior Member
 
KyleSeal's Avatar
 
Join Date: Mar 2014
Location: Toano, VA
Posts: 799
Radiator Questions!

Well Im in the assembly stage (finally) of my 70. So this brings lot of questions to mind during assembly.

The main one I'm battling right now is the radiator fitment. I have a new core support in my truck from LMC, which actually is working out very good, but the radiator I have (came with truck when bought, looks 'stock') does not fit. Ive read some info on HD mounts (upper/lower) but am still left with some questions.

Does this core support not have the HD lower mounts? What is the measurement for the HD lower mounts? Also, does my radiator look stock? The P/O had removed the lower mounts, bolted (literally) the radiator to the core support and used angle iron to hold it in place, so I have no original reference of fitment with it. See attached photos.

I'm not afraid to cut and install new ones, but before I cut up my nice replacement support I want to know for sure. Also, if it comes down to it and I need to just have something that works, would a 2 or 3 row work okay for a mild cam/stock bottom end 350 V8? Average summer temps in VA are 90-100 June - August.

Thanks in advance.
Attached Images
     
__________________
"Sometimes I do serve as a good bad example. Glad to be of service."

My Build Thread (1967 C10, lowered, EFI, daily truck): http://67-72chevytrucks.com/vboard/s...d.php?t=830809
KyleSeal is offline   Reply With Quote
Old 04-17-2017, 11:59 PM   #2
KyleSeal
Senior Member
 
KyleSeal's Avatar
 
Join Date: Mar 2014
Location: Toano, VA
Posts: 799
Re: Radiator Questions!

More pics.
Attached Images
   
__________________
"Sometimes I do serve as a good bad example. Glad to be of service."

My Build Thread (1967 C10, lowered, EFI, daily truck): http://67-72chevytrucks.com/vboard/s...d.php?t=830809
KyleSeal is offline   Reply With Quote
Old 04-18-2017, 12:05 AM   #3
toolboxchev
Registered User
 
Join Date: Jul 2015
Location: 2nd left past the stump on a dirt road.
Posts: 2,629
Re: Radiator Questions!

It appears to me that your radiator is not for your truck. The bottom return is the give away. It should turn toward and up to the center...yours appears to be out out the square body era and your mounts are for a three row radiator possibly.
toolboxchev is offline   Reply With Quote
Old 04-18-2017, 12:16 AM   #4
MIKE77z
Registered User
 
MIKE77z's Avatar
 
Join Date: Feb 2016
Location: Ottawa Ontario
Posts: 41
Re: Radiator Questions!

Doesn't look right to me either, i have a 2 row aluminum replacement from northern rad it fits in the 3 row brackets that came with the blazer that rad you have pictured looks like a rad out of a 6.2 diesel square body truck to me ( those are a 2.5 inch core ) but i could be wrong.
MIKE77z is offline   Reply With Quote
Old 04-18-2017, 12:30 AM   #5
In The Ten Ring
Registered User
 
Join Date: Jun 2013
Location: West Virginia
Posts: 6,421
Re: Radiator Questions!

I'm facing the same problem. My replacement core support came from a 1970 big block'ed truck and I think all my replacement radiators have lower bracket problems. I may have to fab up something.

I am tempted to order a custom, USA made radiator. "Buy American, hire American, the Trump Effect."
In The Ten Ring is offline   Reply With Quote
Old 04-18-2017, 10:00 AM   #6
B. W.
Registered User
 
B. W.'s Avatar
 
Join Date: Nov 2014
Location: Bigfork, Montana
Posts: 1,137
Re: Radiator Questions!

It looks like your lower rad mounts are 3 core, need 4 core mounts, the rad support must be "massaged" to fit the 4 core mounts. 1st pic is 3 core, 2nd is 4 core.
Attached Images
  
B. W. is offline   Reply With Quote
Old 04-18-2017, 09:49 PM   #7
In The Ten Ring
Registered User
 
Join Date: Jun 2013
Location: West Virginia
Posts: 6,421
Re: Radiator Questions!

Quote:
Originally Posted by B. W. View Post
It looks like your lower rad mounts are 3 core, need 4 core mounts, the rad support must be "massaged" to fit the 4 core mounts. 1st pic is 3 core, 2nd is 4 core.
Whoa! Easy solution I guess. Thanks for the pic.

What vendors here carry 4 row lower brackets?
In The Ten Ring is offline   Reply With Quote
Old 04-18-2017, 11:22 PM   #8
Z10
Registered User
 
Z10's Avatar
 
Join Date: Aug 2012
Location: Midland, TX
Posts: 1,267
Re: Radiator Questions!

I have this installed in my 72GMC
http://www.speedcooling.com/1967_197..._Radiator.html

Great price and it fits like a glove. I've got 11k miles on it Hot West Texas with zero issues. You can see more pics in my build thread.

__________________
1969 RS/SS Z10 Camaro Pace coupe
1972 GMC Short Step buildhttp://67-72chevytrucks.com/vboard/s...=1#post6356218
1979 Mazda RX7
1979 Pontiac Trans Am WS6 & 1979 Pontiac Trans Am 10th Anniversary
1999 Honda Valkyrie
2006 Corvette Z06
2010 BMW 650i
Z10 is offline   Reply With Quote
Old 04-19-2017, 01:09 PM   #9
71CHEVYSHORTBED402
Registered User
 
71CHEVYSHORTBED402's Avatar
 
Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,094
Re: Radiator Questions!

Quote:
Originally Posted by B. W. View Post
It looks like your lower rad mounts are 3 core, need 4 core mounts, the rad support must be "massaged" to fit the 4 core mounts. 1st pic is 3 core, 2nd is 4 core.
Bingo, I just went through this. Assuming 4 row radiators were standard with 402 blocks, GM neglected to bend the support so the brackets sit flat.

A crescent wrench works real well OP.

Before:


After:
__________________
Tony
71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025
71CHEVYSHORTBED402 is offline   Reply With Quote
Old 04-19-2017, 01:52 PM   #10
VetteVet
Msgt USAF Ret

 
VetteVet's Avatar
 
Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,703
Re: Radiator Questions!

Mine had a bolt attached to the bottom of the mount that goes through the support but I was lucky, I had four core mounts already installed. I have a three core and a four core radiator but I didn't have the four core top mounts so I used the three core. It was in when the PO had it and it worked fine so I am going to use it.

Also I lost one of the rubber inserts for one of the top ones, and I got creative and taped the support up and filled it with RTV silicon, and it works great.
Then I found the original!
__________________
VetteVet

metallic green 67 stepside
74 corvette convertible
1965 Harley sportster
1995 Harley wide glide

Growing old is hell, but it beats the alternative.
VetteVet is offline   Reply With Quote
Old 04-19-2017, 04:14 PM   #11
71CHEVYSHORTBED402
Registered User
 
71CHEVYSHORTBED402's Avatar
 
Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,094
Re: Radiator Questions!

Whether it was factory or a mechanic I once used, I believe the fact the bottom brackets weren't fitted contributed to one of my top brackets coming apart at the spot welds. I bought all new brackets, repro., from Olympia Wa. guy. Nothing special about original brackets.
__________________
Tony
71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025
71CHEVYSHORTBED402 is offline   Reply With Quote
Old 04-21-2017, 12:06 AM   #12
KyleSeal
Senior Member
 
KyleSeal's Avatar
 
Join Date: Mar 2014
Location: Toano, VA
Posts: 799
Re: Radiator Questions!

HERES THE SOLUTION (I'm the OP'er and I found my solution): my radiator is a stock style 4 row radiator. My LMC core support (in my original post pics) had 2-3 row lower brackets. I needed to get the 4 row lower brackets. A friend of mine had lower brackets from a 1-ton truck, so I removed them and installed them on mine (massaging needed as stated above) and the radiator fits great and is ready to be run. Parts vendors do sell these brackets and they are labeled as "HD brackets".
__________________
"Sometimes I do serve as a good bad example. Glad to be of service."

My Build Thread (1967 C10, lowered, EFI, daily truck): http://67-72chevytrucks.com/vboard/s...d.php?t=830809
KyleSeal is offline   Reply With Quote
Old 04-21-2017, 01:03 AM   #13
In The Ten Ring
Registered User
 
Join Date: Jun 2013
Location: West Virginia
Posts: 6,421
Re: Radiator Questions!

I love the "HERE'S THE SOLUTION" in all caps, it's like something I would type.

HD brackets huh? I am going to have to do that in the next week or so, it's high time to get my truck ready for assembly! Thanks brother!
In The Ten Ring is offline   Reply With Quote
Old 04-22-2017, 04:28 PM   #14
KyleSeal
Senior Member
 
KyleSeal's Avatar
 
Join Date: Mar 2014
Location: Toano, VA
Posts: 799
Re: Radiator Questions!

Quote:
Originally Posted by In The Ten Ring View Post
I love the "HERE'S THE SOLUTION" in all caps, it's like something I would type.

HD brackets huh? I am going to have to do that in the next week or so, it's high time to get my truck ready for assembly! Thanks brother!
Not a problem, IMHO theres too many threads where guys asks questions, figure it out on their own and never come back with their answers!
__________________
"Sometimes I do serve as a good bad example. Glad to be of service."

My Build Thread (1967 C10, lowered, EFI, daily truck): http://67-72chevytrucks.com/vboard/s...d.php?t=830809
KyleSeal is offline   Reply With Quote
Reply

Bookmarks

Tags
core, hd mounts, heavy duty, mount, radiator

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:03 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com