Thanks for the link. At the moment I can not locate the leak. I can't detect coolant level loss at the overflow tank - I do smell sweet coolant occasionally - I assume it's a very small leak. Some days my wife or I do not smell coolant at all. I did purchase and add Bars liquid copper coloant leak solution to the radiator- hoping it will hold off leak until sumertime when I can do gasket repair if needed. I am thinking about getting the collant system pressure tested if I continue to smell coolant. Any advice on locating the leak or thoughts on the Bars solution?