BRINGING IT ALL TOGETHER.... A's, G's & E's


1968 GMC G20 Radiator

Share
avatar
buck7265

Number of posts : 7
Location : Enola PA
Registration date : 2012-04-02

1968 GMC G20 Radiator

Post by buck7265 on Sun Nov 23, 2014 2:05 pm

Hey everyone ..I have a 1968 GMC G20 I need a new radiator any idea ??
avatar
GMman

Number of posts : 780
Location : Prairie Du Chien Wisconsin
Age : 61
Registration date : 2014-10-14

Re: 1968 GMC G20 Radiator

Post by GMman on Sun Nov 23, 2014 3:40 pm

I needed one for my 1966 Chevy van and I checked Summit racing. They have mainly aluminum radiators and handle many makes models and years. Bu you don't know if it's an exact fit. I found one on Summit that was about $235. But a friend of mine (who has been fixing radiators for many years) ordered a new custom made copper core for my radiator. He let me have it at his cost of $285 plus I payed him $100 labor for sandblasting, repairing, and installing the top and bottom radiator tanks. That's pretty cheap for a copper radiator that would normally cost over $600.
I looked up an aluminum cross-flow radiator for a 1968 250 inline six chevy van and found one with plastic tanks for $74. That's dirt cheap if it would work, but you don't know.
http://www.summitracing.com/parts/pli-433162/overview/make/chevrolet

avatar
donivan65
Governor
Governor

Number of posts : 11371
Location : San Diego, California
Registration date : 2008-05-12

Re: 1968 GMC G20 Radiator

Post by donivan65 on Sun Nov 23, 2014 4:43 pm

Well,,,,,,if you have a V8,,,,,,,,this is the coolest 2nd Gen Chevy van cooling system ever invented,,,,,,
Van radiators don't come with radiator caps,,,,,,the radiator feeds off the surge tank,,,,,,,if your tanks are good,,,,,see if you can find a 5513B core for them.......








avatar
kookykrispy

Number of posts : 1433
Location : Tacoma, WA
Age : 43
Registration date : 2009-05-22

Re: 1968 GMC G20 Radiator

Post by kookykrispy on Sun Nov 23, 2014 5:11 pm

do you need down flow or cross flow???????
avatar
GMman

Number of posts : 780
Location : Prairie Du Chien Wisconsin
Age : 61
Registration date : 2014-10-14

Re: 1968 GMC G20 Radiator

Post by GMman on Sun Nov 23, 2014 5:46 pm

That's the thing... Summit shows a cross flow radiator for an inline 6. Plus it has plastic tanks which will crack if the antifreeze level goes down. Since the V8's use a cross flow, 4 row core finding a new (off the shelf) radiator for the application could be difficult.

I guess that I was fortunate to have connections to a radiator repairman.
avatar
rocky69rhodes

Number of posts : 359
Location : chula vista ca
Registration date : 2014-09-26

Re: 1968 GMC G20 Radiator

Post by rocky69rhodes on Sun Nov 23, 2014 6:10 pm

[img][/img] so if my radiator has a cap this cant be used
avatar
donivan65
Governor
Governor

Number of posts : 11371
Location : San Diego, California
Registration date : 2008-05-12

Re: 1968 GMC G20 Radiator

Post by donivan65 on Sun Nov 23, 2014 6:43 pm

the surge tank needs like a 5/8" piece of heater hose to connect it to the radiator tank and about a 1/4" line from the thermostat housing back to it to bleed the air out of the engine,,,,,but 6 cylinders don't use this crossflow radiator set up unless they came with a trailer towing package,,,,,,,
avatar
Digz

Number of posts : 3715
Location : United States Six Lakes MI
Registration date : 2008-05-17

Re: 1968 GMC G20 Radiator

Post by Digz on Sun Nov 23, 2014 6:54 pm

rocky69rhodes wrote:" /> so if my radiator has a cap this cant be used
If you have a down flow rad it would not fit. If you have a cross flow rad that someone has put in with a cap on it, you will also need a high point fill which the tank could provide under normal circumstances. Any pics of what you have?
avatar
Digz

Number of posts : 3715
Location : United States Six Lakes MI
Registration date : 2008-05-17

Re: 1968 GMC G20 Radiator

Post by Digz on Sun Nov 23, 2014 7:07 pm

I got a cross flow 2 row, 1" tubes from Skip White performance for about 135$. It doesn't quite fit the existing saddle mounts for the stock 2nd gen rad but is close. The overall dimension was 28 x 19 I think. It's keeping my 350 cool with no problem. There is a trick to running 2 radiator caps if one has to go that route. Simply T the 2 overflows together and use the same pressure cap on both and use an overflow/recovery bottle. Also using an in-line fill from the stat housing. Just an FYI for options.
avatar
rocky69rhodes

Number of posts : 359
Location : chula vista ca
Registration date : 2014-09-26

Re: 1968 GMC G20 Radiator

Post by rocky69rhodes on Mon Nov 24, 2014 2:10 am

avatar
Digz

Number of posts : 3715
Location : United States Six Lakes MI
Registration date : 2008-05-17

Re: 1968 GMC G20 Radiator

Post by Digz on Mon Nov 24, 2014 5:06 am

You should be good to go Rocky.

Sponsored content

Re: 1968 GMC G20 Radiator

Post by Sponsored content


    Current date/time is Thu Jul 27, 2017 7:12 am