Why is there engine oil in the radiator?

[VonAna]

Here are the reasons for engine oil entering the radiator: 1. Cylinder liner damage. The presence of engine oil in the radiator may be due to cracks in the cylinder liner. Under high pressure, engine oil can seep directly into the car radiator through these gaps. 2. Radiator damage. Additionally, damage to the engine oil radiator or transmission radiator can also cause oil to mix into the radiator, so it's necessary to inspect these components. 3. Cylinder head gasket damage. If there is engine oil in the radiator and the high-temperature warning light is on, it may be due to a damaged cylinder head gasket. Since the fuel in the cylinder is under high pressure for a long time, leading to cylinder liner damage, the oil and water passages can become interconnected. In summary, there are many factors that can cause engine oil to enter the radiator. If any damage is found, simply replacing the affected part with a new one should resolve the issue.