radiator cap partial pressure

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Sep 4, 2018 | 05:58 PM

drose977

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From: Houston

radiator cap partial pressure

1998Durango 5.2L Should I use a partial pressure cap or a full pressure cap?

Sep 4, 2018 | 06:20 PM

HeyYou

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From: Clayton MI

Use the cap designed for the vehicle, and what came from the factory. Running a lower pressure cap than stock just isn't a good idea.

Sep 4, 2018 | 07:04 PM

drose977

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From: Houston

I am try to ascertain what cap came stock in a 1998 Durango 5.2L with A/C. I know it's 16 lb but do not know if the vent is partial or full pressure.

spring-loaded vent valve (Full-pressure, coolant recovery system).
or
free-hanging vent valve (Partial-pressure, coolant recovery system)

see this link for full explanation: https://www.allpar.com/fix/engines/cooling-caps.html

Sep 4, 2018 | 09:14 PM

HeyYou

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From: Clayton MI

Take a look at your old cap, see which kind you have. Buy the same kind.

Sep 4, 2018 | 09:24 PM

Pspklutch

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Joined: Apr 2013

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From: Oklahoma

I know it seems ridiculous, but maybe call the dealer. I've had some poor luck with aftermarket caps cough*Stant*cough. I will consider the dealer next time, if they still make a cap for our trucks.

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