Why is the engine very hot but the water temperature is normal?

[JulietDella]

Reasons for the engine being very hot while the water temperature is normal: 1. Insufficient engine coolant; 2. Faulty water temperature sensor or gauge; 3. Driving with tailwind or prolonged low-speed high-load driving in hot seasons; 4. Ignition timing too early or too late; 5. The louver cannot fully open; 6. Overly lean or rich air-fuel mixture; 7. Severe dirt on the exterior or scale buildup inside the radiator, leading to poor heat dissipation, necessitating radiator cleaning or replacement. When the car engine radiator temperature is too high, you should pull over to a safe area, set up a warning sign, open the engine hood, turn off the engine, and then wait for a period until the engine's water temperature has sufficiently dropped before checking the engine's coolant level.