By the way, what kind of engine do you have?  The reason I ask is that a friend 
of mine had a Westerbeke, and it turns out there is a guy who fixes Westerbeke 
heat exchangers a lot less expensively than buying new ones.  Westerbekes have 
zincs.  He too was losing antifreeze out the exhaust any time the engine was 
running.Yanmars, by comparison don't have zincs.I am still trying to track down 
what might be a slow leak of antifreeze.  I've put dye in my overflow tank and 
have yet to find any on the outside of the engine using a blacklight.  That 
said, the loss of coolant has slowed down, and I'm thinking I may have simply 
failed to get all the air out of the system when I changed antifreeze (fingers 
crossed!).Bruce Whitmore 1994 C&C 37/40+"Astralis"Madeira Beach, FLSent from 
Samsung tablet.
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