2003 Chevy Cavalier oil in air duct

2003 CHEVROLET CAVALIER
95,000 MILES • 4 CYL • FWD • MANUAL
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THESTON
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when i changed my oil i noticed there was about 1/4 quart of oil in the air duct between the valve cover and the air filter. what is cuasing this
Mar 8, 2010 at 10:51 AM
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DOCFIXIT
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Cloged up PCV most likely
Mar 8, 2010 at 2:25 PM