I did a search, but didn't come up with any hits. Maybe I used the wrong search terms.

My 1993 300E has developed an AC leak and it seems to be coming from the low pressure connection. I put in dye and the only place there is any indication of dye is at this connection and the dye is allover this area of the car it. It seems like there is more dye than I put in.

I pulled a vacuum on the system and it held for over an hour so I am pretty sure that this is the only leak point. Originally, I thought I could simply replace the valve stem, but neither of the tools I have will fit over the center pin in the valve. Does the whole fitting have to be replaced or is there some trick to getting the stem out.

The car has factory R134.

Thanks