Questions on AC low pressure port and missing cap

I discovered that the cap on the low pressure port of my 2004 T&C van was missing and wonder if this has caused any problems. Is its purpose merely a dust cap (if so would any tight fitting cap suffice) or does it have other purposes?
Next problem is where to find a replacement without being raped by the dealer. Anyone know where I might locate one?
Frank
Reply to
ECLiPSE 2002
I would try a salvage yard. One from another year and/or model would probably fit.
Everytime I have my A/C serviced, I always check for these before leaving the shop. Very few take the time to put them back after the work.
KM
Reply to
KirkM
Thanks for the response - will try a salvage yard. Still not sure if the cap serves any other purpose than to keep moisture and dirt out of the port.
Frank
On Tue, 22 Jun 2010 12:06:27 -0700 (PDT), KirkM wrote:
Reply to
ECLiPSE 2002
wrote:
Besides keeping dirt out it should have an o-ring in it and it's a second seal to prevent freon from leaking out if the schreader valve leaks a little. Usually if there is a leak you'll see oil. If you run by an AC repair shop they may have a cap laying around they would give you.
Reply to
Ashton Crusher

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