Nissan Tama 2021 Automatic Gasoline mileage: 128 KM Peace, mercy, and blessings of God be upon you. Good evening, gentlemen. My Altima 2021 suddenly overheated. I cleaned the radiator and flushed it. And it returned to normal, but when I push the car and step on the gas hard, its temperature rises. Is there a specific reason for this? And if there is an Altima group, please someone inform us.