2001 S600 Oil in Intake Manifold
Thread Starter
Newbie
Joined: Oct 2018
Posts: 11
Likes: 0
2001 S600
2001 S600 Oil in Intake Manifold
I have pooled oil in the intake manifold, and blue smoke is coming from exhaust as excess oil burns. I'm pretty certain this is related to PCV issues (I understand bad rings are also possible). I have pulled the cover off the right cylinder head and cleared what was some severe blockage in the venturi for PCV. Issue got better after this was cleared, but it is not cured. Some notes...
1) Car sat for years and was obviously neglected
2) I replaced intake manifold gaskets, though I do question how well they sealed.
3) I have corrected several vacuum leaks, but I know there is still at least one more. Could cracked PCV hoses not allow proper ventilation, cause increased crankcase pressure, and force oil into intake? Or excess vacuum drawing oil into the intake manifold?
Are there any other ventilation components that I should check?
1) Car sat for years and was obviously neglected
2) I replaced intake manifold gaskets, though I do question how well they sealed.
3) I have corrected several vacuum leaks, but I know there is still at least one more. Could cracked PCV hoses not allow proper ventilation, cause increased crankcase pressure, and force oil into intake? Or excess vacuum drawing oil into the intake manifold?
Are there any other ventilation components that I should check?
Super Member
Joined: Sep 2012
Posts: 690
Likes: 76
From: Montreal, Quebec
2009 E350 4M Avantgarde;mistress 2002 S600; wife 2014 C300 4M
The 2000-2002 M137 engine connects the venturi in the right valve cover front to the oil cooler. (it is supposed to at idle suck vapors from the crank case thru this portion of the oil cooler - nothing to do with oil cooling - to the intake. At high engine speed this is bypassed). If this was not working right, the intake manifold may be loaded with oil.
Make sure your oil cooler has not failed due to this engine crankcase ventilation causing overheating it .
Been there, done that!
Make sure your oil cooler has not failed due to this engine crankcase ventilation causing overheating it .
Been there, done that!
Last edited by kraut56; Oct 28, 2018 at 06:12 PM.
