Hey DurangoTaB. I am here just outside Durango in Mancos visiting from SoNV. I am having that sooty issue and the ruuuumble. It was rather loud last night. I slept in a house last night and when I came out I noticed the soot. Also, no water is running, (had a small amount in tank for travel). Would I need to bring it in to be checked and if I am already frozen, how would I winterize?? Antifreeze ~vs~vodka? (watched a video about vodka...funny)any help is appreciated.