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what pressure is the radiator cap?

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Old 08-17-2011, 04:34 PM   #1
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Default what pressure is the radiator cap?

Doing a upgrade on cooling system to a 92+ radiator conversion. I was told that the cherokee 4.0L should run a 16 psi radiator cap. Advanced Auto Parts listed a 13 psi radiator cap for a 92 cherokee 4.0L.
Does anyone know for sure what psi cap we should run on our radiators?

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Old 08-17-2011, 04:42 PM   #2
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13 is fine. 16 gives you a few more degrees before it releases. 16 lb cap from Napa is 703-1698 or a 10230.
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Old 08-17-2011, 04:44 PM   #3
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Running a 16 lbs here.
I'm on a bit of a maintenance binge right now.
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