Had a slow leak in the 05 ac system and in the process of installing a dye and a can of 134 I see bubbles down in the base of the schrader valve/housing. I see a selection of these parts in the local parts website but it's a mail order only deal. Any body out there deal with this problem? Or have this part returned after servicing? I'm told Harbor Freight has a vacuum pump and I thought I'd take a crack at a DYI replacement. Like what could go wrong? Ha! Ha!