{"id":509305,"date":"2022-03-22T10:59:32","date_gmt":"2022-03-22T16:59:32","guid":{"rendered":"https:\/\/cartreatments.com\/?p=509305"},"modified":"2022-10-27T09:49:32","modified_gmt":"2022-10-27T15:49:32","slug":"oil-in-intake-manifold","status":"publish","type":"post","link":"https:\/\/cartreatments.com\/oil-in-intake-manifold\/","title":{"rendered":"Why is There Oil in My Intake Manifold (or Throttle Body)?"},"content":{"rendered":"

This article will discuss engines installed in automobiles sold in the United States since 1961. Engines built since that year will include a positive crankcase ventilation (PCV) system, developed to help reduce engine emissions under regulations placed in effect at that time by the Federal Government.<\/p>\n

Positive crankcase ventilation eliminated crankcase venting systems that simply allowed these emissions to be vented directly to the atmosphere. PCV systems capture these emissions and direct them back into the engine to be burned as part of the combustion process.<\/p>\n

Over the past ten years or so, carmakers have been forced to make the PCV systems increasingly complex. These upgrades were required to help reduce the oil these systems can vent back into the engine. Additionally system complexity has increased to deal with the challenges that the use of turbo and superchargers<\/a> have had on blowby to the crankcase<\/a>.<\/p>\n

In this article we will examine how PCV systems can inadvertently direct engine oil into the intake air piping, throttle body and intake manifold and how this problem can be diagnosed and corrected.<\/p>\n

Note:<\/strong> Aside from the PCV system provided on every vehicle, there are no other avenues of entry for oil to get from the crankcase into the engine's intake system.<\/div><\/div>\n

Related: Why is There Oil in My Air Filter?<\/a><\/em><\/p>\n

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Table of Contents<\/p>\n