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General Discussion => General Discussion => Topic started by: brickwhite on April 22, 2021, 09:35:13 AM

Title: 1966 Skylark Radiator replacement
Post by: brickwhite on April 22, 2021, 09:35:13 AM
So the 1966 Skylark GS 401 I just picked up has a leaky original radiator and the local radiator shops want $500 and 3 weeks to re-core it.

Which I may do later....but to get her running..

(https://i.imgur.com/rWSdpmT.jpg)
(https://i.imgur.com/P2YvUD6.jpg)



I found that US Radiator sells a direct fit. They run $500-700 and lead time around 3-4 weeks. Which I believe classic industries and OPGI sells.

http://usradiator.com/buick-gs-1965-66-v8-401-radiator.html (http://usradiator.com/buick-gs-1965-66-v8-401-radiator.html)
PN - 005157ANN
or in aluminum
PN - AL005157AADZ

So I am trying to find something that fits and is available quickly for less money.

I found a post on someone using a griffin aluminum radiator in a 401 GS car. "THANKS Walt"

http://65gs.com/board/index.php/topic,38.0.html (http://65gs.com/board/index.php/topic,38.0.html)

But did not have auto trans cooler lines or a drain:
Griffin #26242-X $180
https://www.summitracing.com/parts/gri-1-26242-x (https://www.summitracing.com/parts/gri-1-26242-x)

(https://i.imgur.com/EcwUpgI.jpg)

(https://i.imgur.com/7krq7qq.jpg)



I did find one from Griffin that did have the auto cooler that has the same dimensions was available and ready to ship from Summit.

(https://i.imgur.com/940adpK.jpg)

Griffin Thermal Products 1-56242-T  -$340
https://www.summitracing.com/parts/gri-1-56242-t (https://www.summitracing.com/parts/gri-1-56242-t)


Inlet Location:
Upper passenger side
Outlet Location:
Lower driver side
Overall Width (in):
27.500 in.
Overall Height (in.):
19.000 in.
Overall Thickness (in):
2.500 in.
Row Quantity:
2
Trans Cooler Line Connection:
1/4 in. NPT
Trans Cooler Adapter Fittings Included:
No
Radiator Inlet Size:
1.500 in.
Radiator Outlet Size:
1.375 in.
Tube Size:
1 1/4 in.

Only issue I see is the outlet size, which is 1.375 or 1 3/8"

Which I should be able to be address with an aftermarket lower hose:

this may work -
ACDelco 19163097
or
ACDelco 88872602
or
VAICO V200147

or this radiator...

https://www.coldcaseradiators.com/product/65-66-buick-gran-sport-wo-air-aluminum-performance-radiator (https://www.coldcaseradiators.com/product/65-66-buick-gran-sport-wo-air-aluminum-performance-radiator)

https://www.coldcaseradiators.com/product/65-66-buick-gran-sport-wo-air-aluminum-performance-radiator (https://www.coldcaseradiators.com/product/65-66-buick-gran-sport-wo-air-aluminum-performance-radiator)
Title: Re: 1966 Skylark Radiator replacement
Post by: brickwhite on April 25, 2021, 09:56:54 PM
The old radiator has had it... soldered many times and only had 2 rows, doubt it cooled much.

(https://i.imgur.com/QBf9Wie.jpg)

So I bought the Griffin Thermal Products 1-56242-T -$340 on Summit

and it fit pretty well in my 1966 GS.

The only issue was the cooler fitting need to have an adapter added for the lines which I happed to have from another car. But the size and outlet spacing were all good.

(https://i.imgur.com/4OBelYr.jpg)

(https://i.imgur.com/7jypddb.jpg)



The radiator was supplied with a drain cock.  I just spray painted it black because I don't like bright silver ones.


(https://i.imgur.com/2mzXK3y.jpg)

(https://i.imgur.com/x6c1Occ.jpg)


Fits well:

(https://i.imgur.com/ZTuZafR.jpg)

(https://i.imgur.com/1ktLPxn.jpg)

(https://i.imgur.com/FH2eOVh.jpg)

(https://i.imgur.com/X4wjaeu.jpg)







Title: Re: 1966 Skylark Radiator replacement
Post by: dsags on April 26, 2021, 06:52:54 AM
Excellent report. Thanks.
Title: Re: 1966 Skylark Radiator replacement
Post by: GS66 on April 26, 2021, 10:19:17 AM
Yes, thank you. Very helpful since I might be doing the same thing!
Title: Re: 1966 Skylark Radiator replacement
Post by: red65gs on April 28, 2021, 07:49:06 AM
That's a great solution. Nice work.
Title: Re: 1966 Skylark Radiator replacement
Post by: GrandpaG on June 03, 2025, 03:44:31 PM
Wow that radiator from Summit/Griffin is $490 now