Why Does Engine Oil Emulsify?
1 Answers
Engine oil emulsification occurs due to water contamination in the oil. The method to check for emulsification is: 1. Open the engine oil cap; 2. Inspect the inner side of the oil cap and the oil filler neck. If the oil appears milky white or creamy yellow, it indicates emulsification. The causes of water entering the engine oil leading to emulsification are: 1. Cracked water jackets in heat exchangers allowing water to mix with oil; 2. Poor cylinder head sealing, cracked water jackets, leaking cylinder liner water jackets, or cylinder liner cavitation, allowing water from the combustion chamber to enter the oil. Emulsified oil loses its film strength and fails to meet engine lubrication requirements, necessitating replacement.