Chrysler 300M Enthusiasts Club
  • Oil in plenum

  • Getting More Air? A Hot Mod. Discuss here.
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Getting More Air? A Hot Mod. Discuss here.

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 #234706  by 1badbrd
 
should there be oil in the plenum. I'm cleaning the throttle body and replacing he plenum gasket and as i turned the plenum over on its side oil started to drip out
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 #234710  by grayslater
 
1badbrd wrote:should there be oil in the plenum. I'm cleaning the throttle body and replacing he plenum gasket and as i turned the plenum over on its side oil started to drip out
Common occurence. IIRC, I had like cup in mine when I removed the plenum on our 2004 some years ago.
 #234712  by 1badbrd
 
so no real casue that i should be concerned about and fix asap
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 #234721  by JoeKD
 
As mentioned completely normal, had oil in both my Intrepid and 300M when I swapped the plenums

A lot of people with aftermarket intakes bypass the PCV hose adn use a breather to stop the oil form getting in
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 #234775  by FIREM
 
Normal for our engine design to have this happen. PCV vapors add up to some oil deposits in the plenum. My guess is when it reaches a certain level some is drawn in to the engine and burned off. Have not heard of anyone having "hydraulic lock" issue (yet)
Routine PCV maintenance should keep it "normal"