2007 kia sedona overheats inspit of overhauled cylinder, gasket.. on 2007 Kia Sedona

my kia is overheating gasket is ok i changed radiator cover, thermostat, overhaul cylinder head and put new gasket by reputable company still overheats what should i do next . the heating starts after driving 30 kms of driving it goes to read zone i have to stop for hour or to to cool it and proceed thank you

Asked by for the 2007 Kia Sedona