Have a 1999 Vanden Plas w/ 110k miles - have gone through replacing all of the major hoses and most of the smaller hoses. System is not overheating - gauge remains in the safe range. But coolant comes out the overflow on the passenger side of the radiator. Any ideas? Not well versed in the mechanics of this car but can do most things... Just added "stop leak" to the system for the first time. Thanks for your help.
Tom

 

Check the overflow lines to see if they are crossed-