I plugged the FHH with a Dorman plug about 8 mos ago, lately I've noticed the sweet coolant smell, and my reservoir level has been fluctuating. Temps have been fine. Long story short, my FHH plug has a minor leak. I've read that a 5/16 hose with a bolt in it is an option, are there any other more permanent options? Like JB weld? Any ideas?