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DeWitt's radiator

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Old Dec 18, 2019 | 09:02 PM
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Default DeWitt's radiator

Was looking over the support and radiator getting ready to install. There's an extra ground wire coming off the bottom and ending just under the fan. This wire isn't used in the diagram, is anyone using a DeWitt's and if so using this wire?


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Old Dec 18, 2019 | 10:29 PM
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My radiator and fan for my 1971 does not have that. The support you have looks funny. What year corvette is that for?
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Old Dec 18, 2019 | 11:04 PM
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Originally Posted by Sigforty
My radiator and fan for my 1971 does not have that. The support you have looks funny. What year corvette is that for?
its an 81
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Old Dec 19, 2019 | 12:51 AM
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I’m pretty sure that goes on to a good ground, like the frame. I vaguely remember that mine had two though. I’ll have a look in the morning and report back.
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Old Dec 19, 2019 | 08:40 AM
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Originally Posted by austx
its an 81
I looked at a bunch of pictures on their website and some have it with the fans and others do not. I wonder if Tom might know why it is there. I bought my setup in January 2013. Here is the picture of my fans.

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Old Dec 19, 2019 | 09:05 AM
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Thanks for the pic. On mine, the ground wire terminates at the screw in the bottom left (or in the case of your pic there, the top left) that holds the fan assembly to the radiator frame. I dont really see a need for it, or even how I'd use it, since the fans themselves each have a ground. Unless someone comes back with some genius explanation, I think it's coming off.
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Old Dec 19, 2019 | 09:15 AM
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Naively, let me ask ya'll.....The temp sender in the corner, that is what you're using for fan control? Until I unpacked this thing, I assumed I'd be going back to the block and a sender there. I sure like the notion of coming up the radiator a lot more, though.
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Old Dec 19, 2019 | 11:14 AM
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1) Ground for the temp sensor.
2) Ground for the radiator to prevent electrolysis.

Electrolysis can also be minimized by using the right coolant. I like the Zerex G-05 plus distilled water and have had no issues with aluminum components since 2001.
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Old Dec 19, 2019 | 12:12 PM
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D'oh!
You guys virtually guided me into answering my own question. A ground for the temp sender. The radiator sits in these massive rubber insulators, of course it would need a ground to use the sender. The way that wire was routed and clipped up at the fan confused me, but I assume it was for packing purposes. I'l just unclip it and ground it to the radiator support. If it helps with electrolysis, even better.

Thanks as always for the advice. This forum is the best.
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Old Dec 19, 2019 | 03:36 PM
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Originally Posted by Sigforty
I looked at a bunch of pictures on their website and some have it with the fans and others do not. I wonder if Tom might know why it is there. I bought my setup in January 2013. Here is the picture of my fans.

Who installed the fans like that?? you or DeWitt??
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Old Dec 19, 2019 | 04:39 PM
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Originally Posted by mrvette
Who installed the fans like that?? you or DeWitt??
Dewitt.
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Old Dec 20, 2019 | 07:09 PM
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Originally Posted by mrvette
Who installed the fans like that?? you or DeWitt??
Originally Posted by Sigforty
Dewitt.
Well, I assume it's solid then, but it sure looks like those fans would kill that support strip that's welded to the two tanks that U with flanges on it, top and bottom......but he made the radiator, so I assume he knows....

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Old Dec 20, 2019 | 07:44 PM
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Originally Posted by SteveG75
1) Ground for the temp sensor.
2) Ground for the radiator to prevent electrolysis.

Electrolysis can also be minimized by using the right coolant. I like the Zerex G-05 plus distilled water and have had no issues with aluminum components since 2001.
Yes
Yes
and yes
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