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  1. #1
    Join Date
    Jul 2015
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    Maryland
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    Default PCV system and Dirty Intake Ports

    I just finished up replacing the PCV system in my 2006 Xc70. While the intake manifold was off, I noticed that the two ports on the passenger side were noticeably dirtier than the other three. Is this normal since that's were the dirty/oily PCV gasses are brought into the manifold, or is this something that I should be concerned about?

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  2. #2
    Join Date
    Jul 2007
    Location
    Toronto, Canada
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    593

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    Quote Originally Posted by K_G_1 View Post
    I just finished up replacing the PCV system in my 2006 Xc70. While the intake manifold was off, I noticed that the two ports on the passenger side were noticeably dirtier than the other three. Is this normal since that's were the dirty/oily PCV gasses are brought into the manifold, or is this something that I should be concerned about?

    Click image for larger version. 

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Views:	26 
Size:	81.4 KB 
ID:	9410
    How was your PCV system? Was it gummed up? I did mine recently and it was pretty bad but the intake manifold was evenly clean. However, my assistant commented on the #1 and #2 cylinder vale stems having the same colour as your #1 and #2 ports.

  3. #3
    Join Date
    Jul 2015
    Location
    Maryland
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    The PCV wasn't completely blocked, but was pretty close to being so. There is a noticeable increase in the amount of vacuum when performing the glove test on the oil fill hole after the PCV replacement.

    I can't see it being related to the dirty intake ports, but I did also replace the exhaust VVT solenoid as a part of this project, which was in response to a 0027 check engine code. A dirty PCV can apparently sometimes trigger the code, so I did that first, assuming it would need to be done at 125k miles anyway. That by itself didn't clear the code, so I replaced the solenoid and everything seems to be running well now.
    Last edited by K_G_1; 04-07-2021 at 09:07 PM.

  4. #4
    Join Date
    Feb 2010
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    Virginia Beach
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    That’s where the PCV nipple is, so, yeah, oil vapor on that side of the manifold is normal. No worries. That’s not so gummed up as to affect flow, though, personally, I always clean that sort of thing, but I’m pretty picky...and buy brake cleaner by the case..usually...
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  5. #5
    Join Date
    Jul 2015
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    Maryland
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    Quote Originally Posted by Astro14 View Post
    That’s where the PCV nipple is, so, yeah, oil vapor on that side of the manifold is normal. No worries. That’s not so gummed up as to affect flow, though, personally, I always clean that sort of thing, but I’m pretty picky...and buy brake cleaner by the case..usually...
    Thanks for the response, and confirming my thoughts. Also, yes, I'm the same way and cleaned it all up with carb cleaner and a toothbrush before reassembly.

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