47-55.1 51 GMC Truck radiator bracket measurements - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Rgarriott51 · 10-16-2018, 07:48 PM

Hey GMC guys. I had to fab up the bottom section of the radiator support due to it being rusted out and need to know what the measurements are. Hight and width.

MARTINSR · 10-16-2018, 09:35 PM

You are going to need to show EXACTLY what you need.

Brian

e015475 · 10-17-2018, 12:54 AM

I have a 49 GMC. Post a sketch of the dimensions you need and I will get them for you..

Is that the radiator you're going to use? Looks like a Chevy not a GMC. The cap is in the wrong spot. A GMC has a gooseneck on the side of the top tank.

Rgarriott51 · 10-17-2018, 09:50 AM

Thanks for the reply guys. I need from the frame rail up to the top and from the bottom middle up to the top.

Yes that us the radiator i will be using. Disnt realize they were different until i started fabbing stuff up, but i think it will clear the cap bracket. Just goin to b a pain in the rear if i need to add or do a radiator flush.

e015475 · 10-17-2018, 11:48 AM

Here ya go.........

The first is the top of the frame rail to the upper two bolt holes on the radiator support

This is the measurement from a line drawn through the upper bolt hole of the radiator support to the bottom of the radiator support (on the inside of the support - add material thickness if you want it to the outside)

Between the radiator support and the frame rail, there are shims to align the front end of the truck to get the fenders and hood fitting properly. Your drawing looks like you want a dimension down to the cross member that supports the radiator support. This is a measurement from the reference holes in the support to the cross member where the lower bolt goes through it from the support

-

This is the setup I used to do the measurements - you can see the closeout piece that goes on top of the radiator support. This is the part that will interfere with a Chevy radiator installed in a GMC unless the radiator is moved back so the neck clears the support.

Here's a photo of an original GMC radiator in a stock truck. The GMC engine was a little longer than the Chevy, so GMC made room by pushing the radiator into the core support. This is why there is a gooseneck filler on the GMC and not the Chevy

Hope this helps you some

Rgarriott51 · 10-18-2018, 01:22 PM

Wow. Thanks for all those measurements. That helps out a ton.

e015475 · 10-19-2018, 10:10 AM

You're welcome

Post up or PM me if you need anything else

Phil

10-16-2018, 07:48 PM	#1
Rgarriott51 Registered User Join Date: Oct 2018 Location: Lafayette Indiana Posts: 3	51 GMC Truck radiator bracket measurements Hey GMC guys. I had to fab up the bottom section of the radiator support due to it being rusted out and need to know what the measurements are. Hight and width. Attached Images

10-16-2018, 09:35 PM	#2
MARTINSR Registered User Join Date: Dec 2000 Location: Boise, Idaho Posts: 6,003	Re: 51 GMC Truck radiator bracket measurements You are going to need to show EXACTLY what you need. Brian __________________ 1948 Chevy pickup Chopped, Sectioned, 1953 Corvette 235 powered. Once was even 401 Buick mid engined with the carburetor right between the seats! Bought with paper route money in 1973 when I was 15. "Fan of most anything that moves human beings"

10-17-2018, 12:54 AM	#3
e015475 Registered User Join Date: Nov 2013 Location: Show Low, Arizona Posts: 778	Re: 51 GMC Truck radiator bracket measurements I have a 49 GMC. Post a sketch of the dimensions you need and I will get them for you.. Is that the radiator you're going to use? Looks like a Chevy not a GMC. The cap is in the wrong spot. A GMC has a gooseneck on the side of the top tank.

10-17-2018, 09:50 AM	#4
Rgarriott51 Registered User Join Date: Oct 2018 Location: Lafayette Indiana Posts: 3	Re: 51 GMC Truck radiator bracket measurements Thanks for the reply guys. I need from the frame rail up to the top and from the bottom middle up to the top. Yes that us the radiator i will be using. Disnt realize they were different until i started fabbing stuff up, but i think it will clear the cap bracket. Just goin to b a pain in the rear if i need to add or do a radiator flush. Attached Images

10-17-2018, 11:48 AM	#5
e015475 Registered User Join Date: Nov 2013 Location: Show Low, Arizona Posts: 778	Re: 51 GMC Truck radiator bracket measurements Here ya go......... The first is the top of the frame rail to the upper two bolt holes on the radiator support This is the measurement from a line drawn through the upper bolt hole of the radiator support to the bottom of the radiator support (on the inside of the support - add material thickness if you want it to the outside) Between the radiator support and the frame rail, there are shims to align the front end of the truck to get the fenders and hood fitting properly. Your drawing looks like you want a dimension down to the cross member that supports the radiator support. This is a measurement from the reference holes in the support to the cross member where the lower bolt goes through it from the support - This is the setup I used to do the measurements - you can see the closeout piece that goes on top of the radiator support. This is the part that will interfere with a Chevy radiator installed in a GMC unless the radiator is moved back so the neck clears the support. Here's a photo of an original GMC radiator in a stock truck. The GMC engine was a little longer than the Chevy, so GMC made room by pushing the radiator into the core support. This is why there is a gooseneck filler on the GMC and not the Chevy Hope this helps you some

10-18-2018, 01:22 PM	#6
Rgarriott51 Registered User Join Date: Oct 2018 Location: Lafayette Indiana Posts: 3	Re: 51 GMC Truck radiator bracket measurements Wow. Thanks for all those measurements. That helps out a ton.

10-19-2018, 10:10 AM	#7
e015475 Registered User Join Date: Nov 2013 Location: Show Low, Arizona Posts: 778	Re: 51 GMC Truck radiator bracket measurements You're welcome Post up or PM me if you need anything else Phil



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.