You go to Auto Zone, NAPA, Advanced Auto Parts, etc. and get a schrader valve kit. It's mostly self-explanatory, but the staff at these shops can guide you through the process if you need it.
you can buy a port on eBay
Look for a leak in the port-side vacuum.
You have to determine the source of the leak then decide on how to fix it.
you have a leak in the port side vacuum. try spraying choke cleaner with the straw on the end around the vacuum lines with the engine running, when you hear the engine rpm raise you just found the leak....
You need to identify the leak before you can fix it.
Sorry, it is almost certainly not repairable. If it is still under warranty they will probably replace it for you.
You tape it up with duct tape dhuuu!
I have a waterline leak at my home from the street to my home....can I get a grant to fix this leak?
What kind of leak and where is it?
It is not the heater core but rain water,near the hood hinge on the passenger side;they is a "cave in" area that trap water and in the middle they is a ruber plug that seem to leak. silicone fix the problem for a few day,now I'm back to square 1 and the leak is back.
A mechanic can charge the a/c and then diagnose the a/c unit. Sometimes all it needs is more freon "charging it" or it may have a leak, or a broken part. They can be as much as 1200 to fix. Charging it cost around 75 bucks or you can get a can at auto zone that is fairly easy to use for maybe 10 bucks and try to do it yourself.
You will have to locate the source of the leak before you can fix it. Re-post with your findings.