I'm not sure what you call these, but they're the woven rubberized fuel-carrying lines that run from cylinder to cylinder, glowplug to glowplug. After doing a valve adjustment last weekend, putting the valve cover back on caused one of these to be knocked loose. I can't for the life of me get it all the way back on. I can get it about halfway, but even with needlenose pliers can't get it the last half of the way on that little nozzle. When I run the car I get a fair leak there, enough so that the car really shouldn't be driven. I'm hesitant to add grease or anything... what's the trick? Or do I just need to fetch a burly male neighbor to add some muscle?