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08-12-2013, 10:27 AM | #1 |
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Join Date: Feb 2011
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4 pound rad cap
went to NAPA today for a 4 pound cap for my new radiator. they can't supply one. anyone have a part number? car is stock 36.
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08-12-2013, 11:06 AM | #2 |
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Location: Orem, Utah
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Re: 4 pound rad cap
Ford part #48-8100 but according to the parts book pressure caps did not start until '38 part number 41A-8100. Don't know if that one would work on your '36.
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Prof. Henry (The Roaming Gnome) "It is good to have an end to journey toward; but it is the journey that matters, in the end.” *Ursula K. Le Guin in The Left Hand of Darkness Last edited by Old Henry; 08-12-2013 at 11:12 AM. |
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08-12-2013, 11:16 AM | #3 |
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Re: 4 pound rad cap
I got mine from Bob Drake Reproductions.
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08-12-2013, 11:24 AM | #4 |
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Re: 4 pound rad cap
Fomoco
I have a Napa 4# pressure cap on my 41. Part number 33017. Bruce Works good Lasts long time |
08-12-2013, 11:25 AM | #5 |
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Re: 4 pound rad cap
CARQUEST #33002 worked on my '50.
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08-12-2013, 11:49 AM | #6 |
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Re: 4 pound rad cap
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08-12-2013, 12:58 PM | #7 | |
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Re: 4 pound rad cap
Quote:
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08-12-2013, 03:15 PM | #8 |
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Location: Eureka Calif.
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Re: 4 pound rad cap
As far as I know my radiator is stock.When I had it rodded out, the radiator guy said that it has an overflow tube and he was pointing to the tube that runs down the front.He said any old cap will do.Even a gas cap(you could get one of those tonight).Mine is not a pressurized system so a pressure cap is not necessary.Yours may be the same.
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08-12-2013, 04:25 PM | #9 |
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Re: 4 pound rad cap
A stock '36 Ford radiator is not pressurized, and will buckle if a pressure cap is used unless it has been modified internally by soldering on an angle brace on the underside of the large area at the top of the top tank. Those who do have a pressure cap without such a brace will notice an oil-canning effect under heat/cool cycles which will, over time, break the solder joints that hold the top tank together. 4 pounds woulnd be the maximum for this tank in any case, and for any tank of the same era.
To fomoloco and others who run skip's 3 lb valve, no matter what cap is used in conjunction with this valve, the pressre is limited by the lower pressure valve. This is, of course, if the overflow tube is not within the fill neck, which would then be controlled by the higher pressure cap.
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