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?

 

13 is fine. 16 gives you a few more degrees before it releases. 16 lb cap from Napa is 703-1698 or a 10230.

 

Running a 16 lbs here.