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quick question about radiator caps

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Old 04-02-2017, 07:43 AM
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Default quick question about radiator caps
My gasket is shot on my radiator cap and I keep losing coolant. Does anybody know the stock PSI for the radiator caps?
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Old 04-02-2017, 08:21 PM
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Pretty sure my stock cap said 18lbs. I went with the pressure release lever style. Works great!
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Old 06-24-2017, 05:22 PM
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Anyone verify that 18# caps used on LS's, please???
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Old 06-24-2017, 05:38 PM
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I think it is more like 15psi for a stock plastic tank radiator.
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Old 06-26-2017, 10:25 PM
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It's 18psi, replaced my stock one last week
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Old 06-27-2017, 01:33 AM
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Yes, it is 18lb for a stock LS1 F-body radiator. I just doubled checked my '98 which still has the assembly line cap and radiator.
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