I am hoping to get some new ideas to solve a problem that I have been chasing for several months. We recently replaced the pumps that circulate coolant through our hydronic heating system. The heater and system work very well. However, since replacing the pumps, I have smelled coolant when the system heats up or when the engine heats up (all part of the same system). I know I am loosing some coolant. However, based on the measured loss, the leak is very small. I have cheeked every logical place for the leak and simply cannot find one. I even hired a professional who could not find the leak. I have checked al the obvious connections, hoses that I can see and taken apart some of the storage areas. What is worse, there are no puddles in the coach, under the coach or tell-tail leak trails.
By the way, we have a 1997 Country Coach Affinity. I would welcome any thoughts that you might have or ideas on how to track the leak down.