NHTSA Complaint #11691504 — 2018 FORD FOCUS

My wife was driving her car home from work when her car suddenly overheated in light traffic. She pulled over and called me. I came by and we saw that the coolant level was low, so we filled it up to the normal level and she drove it another 20 minutes back to our home. She said it was shuddering the whole way back. I started it in the driveway later that evening and a large amount of white smoke came out of the exhaust pipe and the engine still seemed to be misfiring. I tried starting it again the next day and it would crank but not start. It seems to be an issue with the engine, my guess is a ruptured head gasket. The shuddering caused by the misfires made the car unstable to drive especially if it died while she was at speed with other cars around. The car was towed to a dealer over 30 days ago and they said that it may be related to the open recall, but they won't know until they tear it down. Which they still haven't done. There were no engine codes or prior lamp indications until the overheating event.