What Causes a Large Amount of Engine Oil in the Air Filter?

1 Answers
McElliana
07/30/25 5:40am
Air filter has a large amount of engine oil due to: 1. Clogged air filter: Causes excessive intake resistance in the engine, leading to oil backflow in the intake tract; 2. Turbocharger seal failure: Results in oil leakage, causing oil in the air filter; 3. Poor valve stem seal: Allows oil to escape from the intake tract, leading to oil inside the air filter; 4. Overfilled engine oil: Excessive pressure in the crankcase causes oil in the intake tract and air filter. The air filter is a device that removes particulate impurities from the air, consisting of a filter element and a housing. The main requirements for an air filter are: high filtration efficiency, low flow resistance, and the ability to operate continuously for extended periods without maintenance.
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