# Radiator Cap Question

**URL:** <https://59plymouth.net/t/radiator-cap-question/3932>\
**Category:** Tech Support\
**Created:** [April 22, 2025, 9:32pm UTC](https://59plymouth.net/t/radiator-cap-question/3932 "2025-04-22T21:32:46Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![robert1959fury](https://59plymouth.net/letter_avatar_proxy/v4/letter/r/96bed5/32.png) [@robert1959fury](https://59plymouth.net/u/robert1959fury)\
**Post date:** [April 22, 2025, 9:32pm UTC](https://59plymouth.net/t/radiator-cap-question/3932/1 "2025-04-22T21:32:46Z")

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I have a 59 Fury with the rare factory air conditioning that I recently purchased. The radiator cap is rated at 13#, which I"m not sure is correct. My shop manual states that most of the cars came from the factory with 14# caps.

Since this is a facotry A/C car with the appropriate radiator size, shroud, and fan, should the cap be rated at 16#? I have not been able to find a proper answer, so any help would be greatly appreciated-Thanks!

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**Author:** ![Faulkner](https://59plymouth.net/user_avatar/59plymouth.net/faulkner/32/21944_2.png) [@Faulkner](https://59plymouth.net/u/Faulkner)\
**Post date:** [April 22, 2025, 9:41pm UTC](https://59plymouth.net/t/radiator-cap-question/3932/2 "2025-04-22T21:41:21Z")

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Robert, I’ve put the question to Dick Koch - stay tuned!

Dan

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**Author:** ![Faulkner](https://59plymouth.net/user_avatar/59plymouth.net/faulkner/32/21944_2.png) [@Faulkner](https://59plymouth.net/u/Faulkner)\
**Post date:** [April 23, 2025, 6:00pm UTC](https://59plymouth.net/t/radiator-cap-question/3932/3 "2025-04-23T18:00:40Z")

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> [@](#):
>
> Robert, I’ve put the question to Dick Koch - stay tuned!

Dick has been having some communication issues lately (email, text, phone) - but finally today he’s back! I had a conversation with him just now; he tells me 13 psi is what he runs in all his A/C systems, even his '59 DeSoto. He says not to worry!

Dan

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**Author:** ![robert1959fury](https://59plymouth.net/letter_avatar_proxy/v4/letter/r/96bed5/32.png) [@robert1959fury](https://59plymouth.net/u/robert1959fury)\
**Post date:** [April 24, 2025, 7:15pm UTC](https://59plymouth.net/t/radiator-cap-question/3932/4 "2025-04-24T19:15:28Z")

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Thanks Dan, and let Dick know I appreciate the feedback!

Robert