Ok. So here is what I did. Teflon tape would not stay and it would actually fall down into the line. Bad juju there. I ended up using blue thread locker. It sealed the threads nicely and I can still remove the valve if needed. I also put an oring on the inside of the cap to help seal it. It seems to ...

Didn't think about tape. Might try that in the am. Will let you know. Thanks!

My 1998 S70 T5 low side a/c valve leaks. I have replaced the valve twice but it still leaks. I noticed it is leaking through the threads. I don't see a sealing surface on the inside of the valve port. It looks just like a bike tire and if I keep turning the valve, it will keep going. Is there a way ...