Last winter was my first winterization for my Oday 30 and all went well except I think I may have a problem with the Raritan water heater. I couldn't drain all the water out before winter and ended up putting 6 gallons of the non-toxic antifreeze in the water system and ran that through cold and hot taps for a while. I ran the hot for quite some time in hopes of diluting the water that I knew was in there.Anyway, no leaks on the outside of the system and system holds pressure fine. There is a smell when running the faucets though that's got me wondering. First I thought it may be the non-toxic antifreeze which should be fine and should continue to get better I would imagine. But, now I'm wondering if there could be a leak in the heater's heat exchanger which is letting engine coolant into the fresh water which wouldn't be good for for the sake of the engine nor for the crew who use this water for everything but drinking.I've yet to take a look at the engine coolant level. Would this level go down if it was in fact leaking like I suggest? Has anyone else come across anything like this? I'm curious to hear what you all think. Thanks!