Oil puddled under intake manifold gasket


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Old 03-21-23, 06:39 PM
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Oil puddled under intake manifold gasket

Just removed the intake manifold on my 2011 Acura TL and was surprised to find oil puddled underneath the gasket. How would oil makes its way into this area? No oil inside air passages.



 

Last edited by mossman; 03-21-23 at 07:11 PM.
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Old 03-22-23, 04:50 AM
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...perhaps it came from intake above and seeped down through the bolt hole? Doesn't seem very likely since there isn't really any sign of oil up there, other than an oily film, which I'm assuming is normal. PCV channels are gummed up, but not oily.
 

Last edited by mossman; 03-22-23 at 05:44 AM.
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Old 03-26-23, 03:35 PM
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That bolt hole in the center of the stain looks suspicious...
 
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Old 04-08-23, 12:34 PM
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Oil inside intake manifold passages

I'm in the process of replacing the valve covers on my 2011 Acura TL and found evidence of oil in the passages on the top of the intake manifold. Is this normal? I'm not sure how oil would have even gotten there. There are small holes in each intake runner that lead to this channel, then a vacuum line.







 
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Old 04-08-23, 03:02 PM
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The intake sucks blowby air (and oil) from the PCV valve. Not surprising to find evidence of oil at all. Take the PCV valve out and you'll likely find oily residue in the hose and on the valve.
 
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Old 04-08-23, 04:21 PM
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That bolt hole in the center of the stain looks suspicious...
Yeah, but that's where the oil settled, so it would have had to come from the intake manifold that sits on top, and there shouldn't be that much oil in the intake manifold, right?
 
 

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