18 psi rad cap?
08-25-2014, 09:24 PM
#1
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Year: 91
Model: Cherokee
Engine: 4.0
18 psi rad cap?
I have trouble with my 91 Sport overheating in the summer. Replaced the tstat and housing. Would an 18 psi cap help my boiling point?
08-25-2014, 10:00 PM
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Year: 1998
Model: Cherokee
Engine: 4.0L HO
An 18 lb psi cap will increase the boiling point of a 16 lb psi cap by only 6*. Nothing is really gained by doing so. The radiator is the only cooling system component who's sole function is to dissipate heat. How old is your radiator? What other cooling system maintenance have u done?
Last edited by djb383; 08-25-2014 at 10:03 PM.
08-26-2014, 01:20 AM
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You have to provide a little more info like when idling, running 140 down the highway, stop & go traffic? Other than the thermostat any cooling system maintenance in the past 23 years?
08-26-2014, 07:46 AM
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08-26-2014, 07:59 AM
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Year: 1990
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16 pound cap works fine. But, it has to be functional. They don't last forever.
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