2011 Chevy Aveo. An iIndividual filled surge overflow with straight water and drove it for several months in the summer. Now engine is choppy and overheats after approx 5 minutes idling. I drained only the surge overflow and filled to max with 50/50 antifreeze. I don't see the fan coming on. I don't feel any fluid moving through hoses. Haven't checked fuses yet. I'm still in the process of diagnosing everything. I'm not mechanically inclined, just learning as I go. It looks like there's a lot of components to test.

 

Water in surge no problem unless it froze & cracked tank. Time to seek out a reputable mechanic to help you with current problem. Could be anything from a bad radiator or water pump to a stuck thermostat.