I had my car fixed in January 2025, did the head gasket (skim, pressure test, etc), bought most of the components of the cooling system, except radiator, radiator fan and water pipes. 2 months after the car started overheating again. Fan does not come on during slow driving (back to back traffic like it use to when I first bought it) coolant bottle boils over. Fan only comes on when the car overheats (the light goes on to warns me of it overheating or when I switch on the AC (obviously at a slower rpm). Car also started misfiring, especially when I accelerate (put my foot down), If I accelerate slightly or gradually, it's less likely to misfire. I figured it was a sparkplug, so I changed all 4, car drove properly for a trip to town and back, and the next morning it was back to misfiring.