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Causes of Engine Oil Mixing with Radiator Water

09 April 2025
Oli Mesin Tercampur Air Radiator

For vehicle owners, having engine oil mixed with water is one of the most feared situations. How could it not be? Oil in the engine that is mixed with water can cause damage. As a result, the vehicle cannot be used properly and no longer feels safe and comfortable.

Engine oil mixed with radiator water can change the content and chemical structure of the oil, causing it to lose its function. When this happens, the working components of the engine can rub against each other. This can lead to rapid wear and overheating of the engine, making it very easy to experience damage.

How Can Engine Oil Be Mixed with Radiator Water?

One of the causes of engine damage is the mixing of engine oil with radiator water. If you find that the radiator fluid is decreasing, it could be due to a leak or even mixing with the engine oil. This can cause the radiator fluid to seep into the channels and flow into the engine oil.

Before addressing this issue, it is best to know for sure what causes the engine oil in the vehicle to mix with radiator water. Check out the review below to find out the causes.

1. Oil Cooler Has a Leak

A leaking oil cooler can be one of the causes of engine oil mixing with radiator water. There are several types of cars that are now equipped with oil coolers. The presence of an oil cooler has an important function to cool the temperature of the engine oil.

The way it works is that the engine oil is cooled using a fan grid that is supplied with radiator water. During this process, leaks can occur, allowing oil to flow into the radiator water.

2. Engine Block or Head is Corroded

Did you know that corrosion in engine parts can also cause radiator water to mix with engine oil? This corrosion is often found in the upper engine block. To address this, you can weld the corroded part. However, it will be more durable and effective if you replace it with a new one.

3. Cylinder Head is Starting to Bend

Another cause of engine oil mixing with radiator water is a cylinder head that is starting to bend. If this problem occurs in your car, it must be addressed immediately to prevent further damage to the engine components.

To fix this, you can open the cylinder head and then level its surface to stop the leak. If leaks still occur, it would be better to replace that component with a new one.

4. Cylinder Head Gasket is Damaged

Although it is still rare, if the cylinder head gasket is damaged, it can cause engine oil to mix with radiator water. Address this by replacing it with a new component to avoid further leakage issues.

Read Also: Causes of Decreased Engine Oil Volume

Several causes of engine oil mixing with radiator water mentioned above can be addressed according to the problem. Once you know the issue, it will be easier for you to fix it. Do not take this problem lightly, as it can lead to damage to your car's engine.

Surely you do not want this to happen to you, right? Therefore, fix it immediately before the damage worsens. Additionally, you can also get updated and interesting automotive information by visiting the official link Daihatsu. Hopefully, this article can be beneficial for you.

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