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Why is oil in the air cleaner on a 1986 Chevy 4.3L V6?

Updated: 8/21/2019
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9y ago

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In any engine it usually means your piston rings are worn.

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9y ago
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9y ago

The PCV system is not working properly or the engine has excessive blow-by (engine is tired).

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Q: Why is oil in the air cleaner on a 1986 Chevy 4.3L V6?
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