While birddogging a different problem I notice that the brass nipple on the Weber, where you attach the incoming fuel line, leaks fuel. And I can wiggle it a bit back and forth. I don't want to break it by doing the wrong thing so I need to know how to fix this. Does it unscrew so I can then put on some teflon tape and screw it back in? Does it just pull out? Is it supposed to be permanently fixed? Any carb experts out there have a recommendation? And (thinking of my other issue) can this loose nipple, that leaks, prevent the car from running smoothly or even starting? Thanks all.