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#1 |
Registered User
![]() Join Date: Feb 2015
Location: ND
Posts: 20
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lower rad mount retainer lowering for 4 core rad.
so how do you lower the lower rad. retainers for a four core radiator. New core support and 4 core rad sits too high. any ideas. (the 2 1/2" drop spindles didn't help.) lol
thanks everyone. IC |
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#2 |
Registered User
Join Date: May 2013
Location: Post Falls, ID
Posts: 889
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Re: lower rad mount retainer lowering for 4 core rad.
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#3 |
Registered User
![]() Join Date: Feb 2015
Location: ND
Posts: 20
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Re: lower rad mount retainer lowering for 4 core rad.
yep 17 give or take a little noticed in the catalogs they say some modification required for 4 row rad. My radiator sits about 3/4 inch too high for top supports to clamp down properly. just wondering what people are doing to modify this.
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#4 |
Registered User
Join Date: Nov 2012
Location: ravenwood, mo
Posts: 709
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Re: lower rad mount retainer lowering for 4 core rad.
If it clears the hood, just build some new top clamps.
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#5 |
Registered User
Join Date: May 2013
Location: Post Falls, ID
Posts: 889
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Re: lower rad mount retainer lowering for 4 core rad.
I just pryed mine open, with a pair of vice grips, but I don't like the way it sets. It kind of rubs on the corners, and it sets all the way against the core support. I found a set of used four core clamps, I'm going to go pick them up this week. I don't like my modified brackets.
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#6 |
Senior Member
![]() Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,844
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Re: lower rad mount retainer lowering for 4 core rad.
If I recall correctly, the factory just bent the vertical lip down (toward engine)on the engine side of the core support to position the longer 4 core mount lower. Some people on earlier threads have commented on cutting a notch instead. Whatever you do modification wise, be sure to take the vertical positioning of the fan shroud into account. Do you have the correct lower mount/retainers for the 4 core radiator?
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#7 |
Senior Member
![]() Join Date: Sep 2007
Location: Albuquerque NM
Posts: 7,848
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Re: lower rad mount retainer lowering for 4 core rad.
get some clamps off a medium duty 67-72 truck, theyre angled upwards for taller radiators.
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1967custom |
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#8 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,940
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Re: lower rad mount retainer lowering for 4 core rad.
Do you have 4 row radiator cups and the rubbers that go with them? Almost any site vendor will carry them. You will also need the 4 row upper clamps as well along with the rubbers. EZPZ fix... just gotta have the right parts. Unless you're fitting a non-67-72 radiator in your rig, or I'm not understanding you right.
![]() Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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#9 |
Registered User
![]() Join Date: Feb 2015
Location: ND
Posts: 20
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Re: lower rad mount retainer lowering for 4 core rad.
new rad and mounts all ordered together. seems as though the top retainers should have been straight instead of bellied down to meet the rad.
thanks for all the replies. |
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#10 |
Registered User
Join Date: Nov 2000
Location: Huntsville Ontario Canada
Posts: 4,052
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Re: lower rad mount retainer lowering for 4 core rad.
I have had problems with the repop rad cushion being to thick.
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1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD |
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#11 |
Registered User
![]() Join Date: Feb 2015
Location: ND
Posts: 20
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Re: lower rad mount retainer lowering for 4 core rad.
this is 5/8 to 3/4" from being able to bolt the top retainers down to the core support.
thank you for replying |
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#12 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,940
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Re: lower rad mount retainer lowering for 4 core rad.
If you have the correct ones for a 4 core (they are longer) they should cup the top of the radiator just fine.
I got my new 4 core radiator retainers (top and bottom with rubbers) from Wes at Classic Heartbeat (site sponsor). They fit perfectly... even on my aftermarket aluminum radiator. I can't remember but... either the rubbers or the brackets came in "Genuine GM Parts" packaging. Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
Quote:
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#13 | |
Senior Member
![]() Join Date: Nov 2001
Location: Rapid City, SD
Posts: 2,281
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Re: lower rad mount retainer lowering for 4 core rad.
Quote:
Your issue sounds exactly like you do not have the correct 4 row mounts on the bottom. Unless your new radiator is an all aluminum one, sometimes they do not fit down into the saddle correctly. Then you have to trim the rubber pieces.
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My Trucks: 1967 Chevrolet Short Wide Box 327 TH350 9" w/3.90 gears paint will be White - Current Project 1967 Chevrolet Custom LWB 283 TH400 3.73 Posi, no-AC, no-PS, no-PB, bench-seat, small-window - mostly orig driver 1967 Chevrolet CST LWB originally a 327 TH400 3.73 Posi AC PS PB, had Buddy Buckets, Small Window - parts truck 1967 Chevrolet CST LWB, 283 MT 3.73 had Buddy Buckets, Panoramic Window - parts truck 2001 Chevrolet 3500 2WD Crew Cab Dually 8.1L Allison White |
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#14 |
Registered User
![]() Join Date: Feb 2015
Location: ND
Posts: 20
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Re: lower rad mount retainer lowering for 4 core rad.
They sit down into the rubber saddles completely. the upper retainers, where you bolt the retainer to the core support, stand about 5/8" to 3/4" above the core support. thinking I may just make a 5/8 aluminum shim to go between the core support and the upper retainer.
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#15 | |
Senior Member
![]() Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,844
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Re: lower rad mount retainer lowering for 4 core rad.
Quote:
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#16 |
Registered User
![]() Join Date: Feb 2015
Location: ND
Posts: 20
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Re: lower rad mount retainer lowering for 4 core rad.
not running a factory fan. using electric which mount to the radiator with some fabricated mounts I made up.
Firstowner69. are you suggesting I cut the iron that the bottom retainers bolt to in order to lower the lower retainers>> Thank you for your replies IC |
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#17 |
Senior Member
![]() Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,844
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Re: lower rad mount retainer lowering for 4 core rad.
The factory lower 4 row retainers will not seat on the bottom horizontal portion of the core support due to their length and the raised vertical engine side edge of the core support unless the core support is modified to eliminate the problem. The factory just bent an inch or 2 of this edge toward the engine enough to allow proper retainer seating as I recall. In another thread I read where someone cut out a small portion of that raised edge. You can easily bend it down with a 10 or 12 inch crescent wrench in the almost closed position. Below is a poor picture of my original core support with the 4" retainer as delivered by GM. Not sure the pic will help. I zoomed in as far as I could without losing all clarity. You may still have a small(er) gap at the top, but the bolt should draw it down. Hope this helps.
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#18 |
Registered User
![]() Join Date: Feb 2015
Location: ND
Posts: 20
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Re: lower rad mount retainer lowering for 4 core rad.
Firstowner69 thank you
my bottom retainers do sit down tight. That lip was one of my first attempts. Thank you so much for taking the time. Can you tell me if your top retainers look like the ones I posted a pic of earlier. Was thinking they may be wrong. thank you again. IC |
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#19 | |
Senior Member
![]() Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,844
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Re: lower rad mount retainer lowering for 4 core rad.
Quote:
Last edited by FirstOwner69; 02-18-2015 at 06:07 PM. |
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#20 |
Registered User
![]() Join Date: Feb 2015
Location: ND
Posts: 20
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Re: lower rad mount retainer lowering for 4 core rad.
thank you very much. I am going to fab up a couple of aluminum strips that attach to top and bottom retainers on the engine side then bolt down the top retainers on the core support. Again. thank you so much. will send pic.s when I get them done
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#21 |
Registered User
Join Date: Nov 2000
Location: Huntsville Ontario Canada
Posts: 4,052
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Re: lower rad mount retainer lowering for 4 core rad.
Mine new rubber cushions had the exact same problem you show . I threw them out and re used the originals.
__________________
1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD |
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#22 |
Registered User
![]() Join Date: Feb 2015
Location: ND
Posts: 20
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Re: lower rad mount retainer lowering for 4 core rad.
I ended up taking mine to the belt sander. they fit now. gotta love repop. thank you everyone for replying. IC
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#23 | |
Registered User
Join Date: Jun 2014
Location: Glendale, Arizna
Posts: 1,642
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Re: lower rad mount retainer lowering for 4 core rad.
Quote:
x2 |
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#24 |
Senior Member
![]() Join Date: Mar 2012
Location: ripley ny
Posts: 2,904
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Re: lower rad mount retainer lowering for 4 core rad.
hmmm
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