1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Oil In Cold air intake

Discussion in 'Engine Building' started by ATLboi81, Oct 3, 2005.

  1. ATLboi81

    ATLboi81 Junior Member

    Messages:
    2
    Likes Received:
    0
    Joined:
    Dec 21, 2004
    I have a 93 accord and oil is leaking into the intake tube but not into the throttle body(think God). Could someone please please please let me know what this is and if it can be fixed. And Could I have your opinion on if an h22 swap is worth it (Auto tranny)?
     
  2. VTECPOWER

    VTECPOWER Senior Member

    Messages:
    1,683
    Likes Received:
    0
    Joined:
    Oct 6, 2003
    Location:
    Winchester, VA
    Do you have a hose going from the valve cover to the cold air intake?
     
  3. drpenguin

    drpenguin Senior Member

    Messages:
    498
    Likes Received:
    0
    Joined:
    Aug 25, 2004
    Location:
    Salem, Or
    Your oil is too high. I had this problem with my HF motor.
     
  4. dohcvtec_accord

    dohcvtec_accord WRX Sellout

    Messages:
    8,433
    Likes Received:
    1
    Joined:
    Sep 29, 2002
    Location:
    The left lane
    It's not the oil being too high. [​IMG]

    The breather hose from the valve cover gets routed back to the intake. Because oil is presentin the head, some of it gets blown into the breather hose and into the intake. This is completely normal.

    To combat this, people will sometimes install an oil catch can. IMO, it's not neccesary unless you have alot of oil accumulating in the intake, and if that's happening, you have other problems to worry about. :)
     
  5. ATLboi81

    ATLboi81 Junior Member

    Messages:
    2
    Likes Received:
    0
    Joined:
    Dec 21, 2004
    Yes I have hose from valve cover to intake. It has not always done this and oil has always been changed with same amount of oil. I was told that it could B a piston ring could be going bad. Thanks for the insight guys [​IMG]
     
  6. robus

    robus Junior Member

    Messages:
    9
    Likes Received:
    0
    Joined:
    Feb 3, 2005
    Btw, what's the purpose of the breather hose? Is it harmful to just block it off?
     
  7. drpenguin

    drpenguin Senior Member

    Messages:
    498
    Likes Received:
    0
    Joined:
    Aug 25, 2004
    Location:
    Salem, Or
    I have seen people take the hose off and put a little filter on. I dont know if its functional or just for show.
     
  8. dohcvtec_accord

    dohcvtec_accord WRX Sellout

    Messages:
    8,433
    Likes Received:
    1
    Joined:
    Sep 29, 2002
    Location:
    The left lane
    It's definitely harmful to block it off.

    Putting a small filter on there is OK, but it's more for show. I imagine you'd have to take it off and clean it periodically, since the oil that was getting blown into your intake tube would be getting trapped in the filter.
     
  9. kyleirwin

    kyleirwin Retired OG

    Messages:
    2,420
    Likes Received:
    2
    Joined:
    Oct 24, 2002
    Location:
    Vegas
    that's correct. do a compression test.
     
  10. robus

    robus Junior Member

    Messages:
    9
    Likes Received:
    0
    Joined:
    Feb 3, 2005
    I did block it off a while back, as I installed a supercharger and didn't think oil could work it way in with compressed air in the charge pipes anyway... but now that I think of it, it would lubricate during vacuum right?
     
  11. confusatron

    confusatron Senior Member

    Messages:
    464
    Likes Received:
    0
    Joined:
    Jul 15, 2005
    Location:
    Chicago area
    The breather functions the same as the hose, but instead of blowing it into your intake, which is a shitty idea if you think about it, it just gets caught in the filter. This also allows you to put a custom homemade pipe intake deal on there if you want, and bypass the need to have a hose nipple on your intake pipe. Christ, I had no idea until this thread what that thing was, but now it all makes sense. Cool. :)
     
  12. EGProject

    EGProject YEEEEAAHHHHH

    Messages:
    2,870
    Likes Received:
    28
    Joined:
    Jun 26, 2004
    Location:
    Whitinsville, Massachusetts
    Problem being, Honda designed these motors with a semi presurized crankcase (PCV = positive crankcase ventilation). By using the vacuum of the engine, it draws air (and sometimes oil) out of the crankcase, and up into the valve cover - and eventually back into your intake. Running normally, you shouldn't have liquid in your intake - rather maybe a trace of oil. For now, run the hose facing down, away from the intake - into the open. either buy a cheapo-Ebay catchcan, or fix the oil blow-by problem (which as stated earlier, could by rings, or ring lands). If you buy the catch can, hook one end to the valve cover, and the other end to the PCV tube behind the motor. Haven't done this myself, so I'm not totally familiar with the PCV system - so maybe PSol could help me out a bit.

    EDIT: Catch cans are a must if you are running forced induction, blow-by is common in boosted engines, and a fine mist of oil into your intake tract can cause detonation, and generally shitty performance.
     
Verification:
Draft saved Draft deleted

Share This Page