4 Core Radiator Install Problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

roadstar · 11-19-2004, 08:50 PM

Got a 67 that started life with a I6 which I swapped to a 305. Finally got around to putting in a 4 core radiator. Problem is that it sticks up too tall for the top mount brackets to bolt down flush on the frame without using a spacer of about 1/2 inch. I did the following:

1) New 4 core upper & lower radiator mount brackets and rubbers.
2) Notched the back of the radiator mount pan so that the wider 4 core brackets will seat down flush.

The radiator is from Autozone and I have cross checked the part number and it is the one that everyone seems to list for this application. I believe the part number reference is GM 43-3369 if memory serves me right.

Anyone run across this problem or give me a hint to what I did / didn't do ??

Thanks in advance!!

da-burb · 11-19-2004, 10:24 PM

Measure the height of your old side tanks and compare to the new radiator. My guess is they are the same. The difference is the rubber mounts for your 4 core might be new and they need a little more oompf to compress them. I have installed radiators that had the upper brackets a 1/2" above the rad support. It still bolted in nice and snug without any problems.

RODSBYT · 11-19-2004, 10:56 PM

I had to trim the back of the rubber pads too. I think the repo pads are thicker and denser than the originals. I have had it in about a year with no problems.

roger0080 · 11-20-2004, 02:04 AM

Like Da Burb says. With new rubber it does that. It will compress down and look normal (eventually).

11-19-2004, 08:50 PM	#1
roadstar Registered User Join Date: Nov 2004 Location: Arlington, TN Posts: 6	4 Core Radiator Install Problem Got a 67 that started life with a I6 which I swapped to a 305. Finally got around to putting in a 4 core radiator. Problem is that it sticks up too tall for the top mount brackets to bolt down flush on the frame without using a spacer of about 1/2 inch. I did the following: 1) New 4 core upper & lower radiator mount brackets and rubbers. 2) Notched the back of the radiator mount pan so that the wider 4 core brackets will seat down flush. The radiator is from Autozone and I have cross checked the part number and it is the one that everyone seems to list for this application. I believe the part number reference is GM 43-3369 if memory serves me right. Anyone run across this problem or give me a hint to what I did / didn't do ?? Thanks in advance!! __________________ 2002 Chevy Blazer 1967 Chevy Stepside 2002 Yamaha Roadstar

11-19-2004, 10:24 PM	#2
da-burb "Ochre Ogre" Join Date: Apr 2000 Location: Springfield, MN Posts: 3,558	Measure the height of your old side tanks and compare to the new radiator. My guess is they are the same. The difference is the rubber mounts for your 4 core might be new and they need a little more oompf to compress them. I have installed radiators that had the upper brackets a 1/2" above the rad support. It still bolted in nice and snug without any problems. __________________ Bowtie Truck Stop Inc. Mid-West GM Truck Restoration Parts Supplier Your Key Parts, Auto Metal Direct, Dynacorn, and Goodmark dealer. like us @ www.facebook.com/BowtieTruckStop 1971 C-10 Suburban (Ochre) 1971 K-10 Suburban (Ochre) 1972 C-10 Suburban (Ochre) 1972 K-20 Suburban (Yellow- that just aint right!) Springfield, Minnesota 56087

11-20-2004, 02:04 AM	#4
roger0080 Registered User Join Date: Nov 2000 Location: Carver County, Minnesota, USA Posts: 626	Like Da Burb says. With new rubber it does that. It will compress down and look normal (eventually). __________________ 72 Chev C-10 90% restored (former AZ truck) ... 71 Chev K-20 Cheyenne my vacation crusier... 72 Chev C-10 Now retired and striped after many faithful miles... 72 GMC 1500 Retired to the junk yard after bought new in '71...

11-19-2004, 10:56 PM	#3
RODSBYT Registered User Join Date: Jun 2004 Location: GRAFTON , OHIO Posts: 58	I had to trim the back of the rubber pads too. I think the repo pads are thicker and denser than the originals. I have had it in about a year with no problems.



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