can't figure it out
 

my 04 concorde was having problems with overheating. took in to a shop and it had a bad radiator fan assembly. replaced that along with the belts, and thermostat. it was also time to replace the timing belt so the water pump was changes as well. it solved the problem with the overheating but after driving for any extended period of time it smells as if it's overheating (very light odor). can smell anti-freeze although the gages are fine and there are no leaks or smoking of any kind. im thinking maybe there is a small leak somewhere and it dripping down on something hot but vaporizes before reaching the ground but i can't find any wet spots, should I be concerned?Ii get a check engine light for a few minute every 3 or 4 weeks but it quickly goes away. should I be worried any suggestions?

Get a pressure test done see where the leaks are