Why is the engine temperature 100 degrees hotter than the radiator?

The engine temperature can be significantly higher than the radiator temperature due to the engine's combustion process, which generates heat from fuel burning. The radiator, on the other hand, is designed to dissipate this heat through coolant circulation and air exposure, keeping it cooler. Additionally, heat transfer losses occur as coolant moves from the engine to the radiator, resulting in a temperature difference. This difference is essential for efficient engine operation and cooling.