Damn, had forgotten about that one. Used to do that back in the day with old Volvos as they had no hump on the hose inlets/outlets. We used the el-cheapo hair spray that made the ladies big hair look like a helmet, and just as hard. Don't know if you can even get that stuff today. Permatex Indian Head gasket shellac compound worked well too. I know that's still available, use it all the time on bike stuff.