Drew, there is definitely a simple rubber gasket/washer in there. I replaced mine last year due to seepage, its a little bitty bugger rubber seal that you could find at most any hardware store. Or, pay for through an auto parts place. As you know, the threaded connector has no real torque expectations, its just "tighten till satisfied". Clean off all the grime around that connection and a simple rubber washer will do it for you.