| Super Delux | -- 01-10-2014 @ 12:51 PM |
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I have to replace the radiator cap for my 1946 Ford flathead 100 hp (stock radiator). What poundage pressure cap should I puchase? I have seen everthing from 0 to 7 pounds. Prices vary from $7.95 to $25.00
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| cliftford | -- 01-10-2014 @ 3:42 PM |
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If memory serves me correctly, they came from the factory with a non pressure cap. The after market pressure caps that were uswed held 6 or 7 lbs. This helped prevent over heating and loss of collant.
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| kubes40 | -- 01-10-2014 @ 3:48 PM |
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Actually all 1946 Ford passenger cars were equipped with a pressurized cap designed to hold 3 1/2 to 4 1/2#. Sometime during the 1947 production, these caps were no longer being installed on cars but continued to be insatlled on trucks. I would be apprehensive to put any more than 4# of pressure on an old (core) radiator.
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| 42guy | -- 01-10-2014 @ 4:12 PM |
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My 42 has a 4# cap. I assume it's the original radiator.
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| kubes40 | -- 01-10-2014 @ 4:46 PM |
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Originally 1941 and 1942 passenger cars used the same cap as 1a '39 and '40 Ford. That is - NO pressure. Pressure caps were not installed on passenger cars until the 46 models and then only until early 1947.
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| supereal | -- 01-10-2014 @ 8:53 PM |
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I have run four pound caps for years with no problems. While it does raise the boiling point, the main advantage is to contain coolant loss from thermal expansion.
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| Super Delux | -- 01-11-2014 @ 9:02 AM |
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Thank you for your input.I have found the answer I was looking for. Takecare, Super Deux
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