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Old 06-07-2012, 02:13 PM
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Plug threads on AFCO radiator?

At the bottom of my AFCO aluminum radiator, there are two threaded holes. One of them are plugged with som kind of "winged" plug. A drain plug maybe?The other one is open.
Any of you know the thread size on the open one? I need to plug that one, too.


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Last edited by staleg; 06-07-2012 at 02:34 PM.
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Old 06-07-2012, 03:46 PM
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It should be 1/8 NPT, but I can't garantee that.

Bill
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Old 06-07-2012, 04:29 PM
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I would guess it would be 1/4 " fpt, if you put a plug in it , make sure to use a good teflon thread sealer, prevents galling & leaks .

dave
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Old 06-07-2012, 05:27 PM
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Quote:
Originally Posted by staleg
At the bottom of my AFCO aluminum radiator, there are two threaded holes. One of them are plugged with som kind of "winged" plug. A drain plug maybe?The other one is open.
Any of you know the thread size on the open one? I need to plug that one, too.

The wing nut one is a radiator drain. The other is either an 1/8" or 1/4" NPT. The plugs are cheap so buy both just to make sure. Also, it would be a good idea to buy the brass plugs and use a good sealer on it. Stay away from steel plugs.
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Old 06-07-2012, 05:42 PM
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Quote:
Originally Posted by S10 Racer
Also, it would be a good idea to buy the brass plugs and use a good sealer on it. Stay away from steel plugs.
Very good advice, I wouldn't have thought of that.

Brian
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Old 06-15-2012, 06:59 AM
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An update on this one: The hole is actually 1/2" NPT threads. I've ordered a brass plug.
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Old 06-15-2012, 07:14 AM
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Quote:
Originally Posted by staleg
An update on this one: The hole is actually 1/2" NPT threads. I've ordered a brass plug.
Thanks for keeping us updated.
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Old 06-15-2012, 09:51 AM
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heater hose ?

sometimes a heater hose was connected to the radiator.
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Old 06-16-2012, 09:25 AM
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Originally Posted by timothale
sometimes a heater hose was connected to the radiator.
Ayuh,.... That explains the huge size of it,...
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Old 06-17-2012, 09:50 AM
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One more update, i'm afraid.
Because of my lack of knowlegde, I thought 1/2" NPT male threads measured app 1/2" in diameter. That's not correct. 1/2" NPT threads actually measure 0,84 inches.

The correct plug size is 1/4 after all...
sorry for the mis-information.

Last edited by staleg; 06-17-2012 at 10:17 AM.
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