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Old May 12th, 2017, 12:18 AM
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Default Re: Radiator overflow tank?

The "overflow condenser" shown by Groby and others was definitely an accessory in the 50's and earlier. It was used on vehicles without A/C. It was used in vehicles without special radiators. Just guys adding a neat aftermarket gizmo they didn't need.
If they are "Factory", GMC would have mounted them in exactly the same place with exactly the same bracketry, hoses and hardware; and be the same unit with GMC logo. The fact that they are on A/C truck with larger radiators just means that GMC could have used larger radiators with A/C. Does not mean that the "overflow condenser" was installed at factory. The overflow condenser does not keep the radiator from over heating due to more "heat and strain" anyway. If they used a bigger radiator so that it would handle the A/C "strain", it would handle it.
The examples I see so far on this post show that the units were not mounted the same. They look aftermarket/dealer units.
If the vendors thought it was used in 60-66 they would surely include those years for more sales.
Until it is found on a build sheet or in a GMC document for 60-66, it should not be labeled "Factory", that's my take on it. Just an opinion not hostility.

Last edited by AZKen; May 12th, 2017 at 12:54 AM.
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