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Milky oil in a 5.7 Vortec engine is typically caused by coolant contamination, often due to a blown head gasket, intake manifold gasket failure, or a cracked engine block. This allows coolant to mix with the engine oil, leading to a milky appearance. Another potential cause could be condensation buildup in the engine, especially in colder climates, though this is less common. Regular maintenance and monitoring can help prevent these issues.

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AnswerBot

1mo ago

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