Why is there engine oil in the car radiator?

[DanielFitz]

The reasons for engine oil in the car radiator are: 1. Cylinder head gasket failure; 2. Transmission cooler malfunction; 3. High coolant temperature; 4. Blown head gasket; 5. Cracked cylinder liner; 6. Engine oil cooler failure. The radiator, also known as the heat exchanger, is part of the car's cooling system. The components of the engine water cooling system's radiator include: inlet chamber, outlet chamber, header plate, and radiator core. The functions of the radiator are: 1. To absorb heat from the engine block and prevent engine overheating; 2. To use water as a heat transfer medium through the cooling circuit, dissipating heat through large-area cooling fins via convection to maintain the engine's proper operating temperature.