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#1 |
Registered User
Join Date: Jan 2018
Location: Lemoore, CA
Posts: 74
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Difference between 3 & 4 row radiator mounts
I’m trying to figure out if I need to find/buy different mounts for the radiator I got. We went with the 4 row copper/brass from Summit (Summit Racing® Classic OEM Radiators SUM-382006)
I can’t seem to find a simple “the 4 row mounts are x inches wide/long” comment or diagram anywhere. I really don’t want to order something I already have. These, top and bottom are 4”x1”. Any help is much appreciated. What exactly is the size difference between the 3 & 4 row mounts? |
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#2 | |
Registered User
Join Date: Oct 2016
Location: Dallas Texas
Posts: 3,090
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Re: Difference between 3 & 4 row radiator mounts
Quote:
Just measured mine and they're 4"x1" ( pad area ) as well around my 4-core unit. https://67-72chevytrucks.com/vboard/...rence&post=#21 -klb
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67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi 07 335 sport turbo 6sp 94 Trans Am GT LT1 6sp posi -- sold after 22yrs 99 540 sport V8 6sp -- sold 73 240z L24 4sp -- given to friend 68 C10 step 350/350 3.73 open -- sold Last edited by weq92f; 02-05-2021 at 07:48 PM. |
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#3 |
Registered User
Join Date: Jan 2018
Location: Lemoore, CA
Posts: 74
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Re: Difference between 3 & 4 row radiator mounts
Thanks a bunch! If someone has different info, let me know.
The thread you linked to was the closest I got to good information on it and was the reason I knew to check if I needed something bigger than what I’ve already got here. Now to find pads that actually fit. The ones that we bought from Inline Tube are too thin top to bottom, but they were the closest we could find to looking like they fit without having to buy a whole kit. Again, nothing when you’re buying these gives dimensions either. For a newbie like me it’s just frustrating. So thanks again!!! |
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#4 |
Registered User
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,699
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Re: Difference between 3 & 4 row radiator mounts
This is what you need, top and bottom pads/mounts..
https://www.classicindustries.com/pr...rts/17181.html Listing shows "coming soon", but they have them in stock now.. I just received mine last week... |
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#5 |
70+ ( Old Skool Club )
![]() Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,119
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Re: Difference between 3 & 4 row radiator mounts
Now I was all set to pull my original 3 core rad, thought strange too as its original and I have factory A/C on my truck and thought because of the A/C the factory would have put a 4 core, and have it rebuilt into a 4 core but this Summit one has me thinking.
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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#6 | |
Registered User
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,699
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Re: Difference between 3 & 4 row radiator mounts
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#7 | |
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Join Date: Sep 2015
Location: Saskatoon, SK - Canada
Posts: 296
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#8 | |
Registered User
Join Date: Jan 2018
Location: Lemoore, CA
Posts: 74
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Re: Difference between 3 & 4 row radiator mounts
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#9 | |
Registered User
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,699
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Re: Difference between 3 & 4 row radiator mounts
Quote:
On the old lower mounts, I had to drill out a rivet on each side to remove them.. I used pan head bolts and nyloc nuts to fasten the new lower mounts in place. I also have twin electric fans on a custom metal shroud.. I apologize, but I'm not removing parts just to provide a measurement.. All I can say is those mounts in the link I posted will fit a 4 core radiator.. Did you go to that site and read the product details? It states they are specifically needed for installing a 4 core in place of a 3 core... Have you contacted Summit and asked them which mounts you need for their radiator? |
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#10 | |
Registered User
Join Date: Jan 2018
Location: Lemoore, CA
Posts: 74
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Re: Difference between 3 & 4 row radiator mounts
Quote:
Neither one of us remembers if it was 3 or 4 row that came out of it (only that we knew we wanted a 4 row to go in) and we’re kicking ourselves for not double checking when we left it at the radiator shop. The current mounts and old rubber pads seem to actually fit well, the old rubber is just super hard on one side and on the other, where tranny fluid leaked it is super swollen. I’m really just trying to know what we had/have and not buy something I don’t need, but the hubby is like, just buy the mounts (that you linked to) and if it means we have extra parts then we have extra. So that’s where we are. I really do appreciate everyone’s help. We’re trying to get her running on a shoestring budget while still not going totally Roadkill on it. |
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#11 |
Senior Member
![]() Join Date: Mar 2015
Location: washington
Posts: 2,243
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Re: Difference between 3 & 4 row radiator mounts
If you have a replacement Core Support the lower steel mounts will not fit without modifications. As I understand it the inner lip was bent down from the factory if you had the large radiator. I attempted to bend mind down but had not luck. Might have worked better if it was on a steel floor. So I ended up making a slit on each side of the lower support so it was set down and it could be bolted up.
I have never actually paid much attention to this detail untill I attempted to install mine. I did compare it to the original Core Support. It didn't have the bent lip but my truck was a 6 cylinder. I don't believe the short 3 core supports are produced aftermarket. They just expect you to use the 4 core ones on the narrow radiator. More information they leave out of the catalog descriptions. I often doubt any of the resellers have ever worked on a truck much less a classic 67-72. A not so good picture of the radiator almost installed. Mocking up the hoses. LS1 Camaro Accessories. Rick |
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#12 | |
Registered User
Join Date: Jan 2018
Location: Lemoore, CA
Posts: 74
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Re: Difference between 3 & 4 row radiator mounts
Quote:
Called up Classic Industries and I gotta say their customer service was great. He double checked measurements for me to make sure they hadn’t mislabeled the part they sent. They don’t sell anything in the size I need so he hooked me up with their supplier’s number in case I needed something they just don’t order from them and got me a return authorization. Called Summit about what was needed for this radiator and after a really long hold and explaining the size discrepancy a few times, the customer service lady finally talked with a tech and I was given a part number. Fingers crossed the pads should be here in a couple of days. If it works I’ll update with the part number. So, I actually DO have the 4 row brackets or retainers (as Classic Ind. calls them) and now I am just waiting on new pads. |
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#13 | |
Registered User
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,699
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Re: Difference between 3 & 4 row radiator mounts
Quote:
If those from Summit don't work for you, try these.. https://www.classicparts.com/1967-72...ctinfo/78-754/ |
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#14 |
Registered User
Join Date: Jan 2018
Location: Lemoore, CA
Posts: 74
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Re: Difference between 3 & 4 row radiator mounts
Today I received the radiator mounting pads from the Truck Shop and they were a perfect fit!!!
Their website isn’t super user friendly, but definitely not the worst. I ordered Wednesday and they were already waiting for me at the post office this morning (Monday) so they probably got here before the weekend. Item # 67-10302 Manufactured by Counterpoint Description: With A/C, or 4 core heavy-duty radiator 68-72 At the writing of this post they’re $7 for a pair and I pad $10 s/h Www.truckandcarshop.com |
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#15 | |
Senior Member
![]() Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,267
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Re: Difference between 3 & 4 row radiator mounts
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
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#16 |
Senior Member
![]() Join Date: Jul 2008
Location: Carrollton, KY
Posts: 1,214
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Re: Difference between 3 & 4 row radiator mounts
Here's a pic showing the total length of a set for a three row radiator (the shorter ones).
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Dave R. 1972 K20 1972 C20 Highlander 1967 C10 |
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#17 |
Registered User
![]() Join Date: Oct 2017
Location: Hudson Valley, New York
Posts: 643
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Re: Difference between 3 & 4 row radiator mounts
I realize this thread is about a year old, but I thought to add.
As a preventive measure, I decided to pull the radiator from my '68 Utility. I (wrongly) assumed since it's a factory born 396 it was a 4 core since the truck is all original unmolested, yet it turns out it is in fact a 3 core. First, the part# on the rubber mount(s) is 3889073 (as photos show). I took some measurements of the PADS, showing they are about 3/4" wide, by approximately 3 3/4" long. This would indicate these are correct for a factory 3-core (or 2 core) radiator. Noting that on my radiator tanks, there physically is no room where these tanks could accommodate a 4-row core. I'm including additional information below, but I'm still wondering...any others out there with an original Big Block with a 3-core radiator? ![]() ![]() ![]() ![]() Additional info on radiator pad fitment: In a nutshell, from what I see, if the PADS measure around 3/4 " wide x 3 3/4" long, it's my belief they will only work for a 2 or 3 core radiator. I believe the 4 core pads are about 1" wide and 4" long With that said, I was talking with MrMudd (Greg) where on his truck ( a '72?) the radiator is a 3-core, yet the tanks are wide enough, where they could accommodate a 4-row core. Many may already know this, and again, I'm simply adding information to a thread I found useful, but the tank measurement is important when considering fitment for a 3 or 4 core radiator with the respective pad mounts. In Greg's example his radiator is (technically speaking) a 3-core, YET his radiator must be mounted with the FOUR core mounts/pads since the TANK is wide enough where his core could actually be a 3 or 4 core. Kevin
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'68 C20 Utility 396 4sp (BuildThread: http://67-72chevytrucks.com/vboard/s...d.php?t=806904 ) '68 C10 50th Last edited by KevinK7; 03-21-2022 at 08:02 PM. Reason: add photos |
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#18 | |
Registered User
Join Date: Dec 2020
Location: Joggins Nova Scotia
Posts: 1,598
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Re: Difference between 3 & 4 row radiator mounts
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#19 |
Registered User
![]() Join Date: Oct 2017
Location: Hudson Valley, New York
Posts: 643
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Re: Difference between 3 & 4 row radiator mounts
Thanks for adding those pics Greg
![]() This forum has been a treasure trove of information, and this thread is one of those cases. I was going to consider a 4-core radiator, but (now I realize) I would need to also change not just the rubber pads, but of course the mounts too. I swore I wouldn't worry about staying 'original' with this truck, but darn it lol I am ![]()
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'68 C20 Utility 396 4sp (BuildThread: http://67-72chevytrucks.com/vboard/s...d.php?t=806904 ) '68 C10 50th |
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#20 | |
Registered User
Join Date: Dec 2020
Location: Joggins Nova Scotia
Posts: 1,598
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Re: Difference between 3 & 4 row radiator mounts
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