I've got a 2002 with a 3.8 V6. I've changed the water pump, bypass elbow, thermostat and radiator cap. There are no visible leaks, no coolant on the floor underneath, no water coming out of the tailpipe and there is no coolant in the oil. But continuously the coolant disappears somewhere. The only thing I can think of is it is leaking into the exhaust flow and going out the tail pipe as vapor. Has anyone else heard of or experienced this problem?

 

take a whiff of the exhaust if its got a sweet smell theres coolant there