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Thread: Rad cap

  1. #1
    Official RnS Addict Chitty's Avatar
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    Rad cap

    I recently purchased a 48 ford that runs an oldsmobile 303 ( 1952 ) The rad is original but when hot the cap leaks, what pressure should the cap be for this engine? and where can one be purchased. Thanks

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    I'm a grown up member now ! americanautomatics's Avatar
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    A 1952 303 Olds runs a 7 PSI cap. You can buy 7 PSI caps on ebay uk. eg old morris minor or similar. Just enter the cap description in ebay. About £6. Got to be worth a shot !
    Obviously 7 psi is a bit low and water will boil at a lower temp at this level. If your rad is original then maybe best not to exceed that pressure as it may burst the core tubes.

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    Official RnS Addict Chitty's Avatar
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    Thanks, the old cap is a 7lb. but I will get a new one just in case,

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