Oil darkening quickly and coming out of air filter.

Discussion in 'Mechanic and Repair' started by lawnsaspire, Sep 21, 2012.

  1. lawnsaspire

    lawnsaspire LawnSite Bronze Member
    Posts: 1,541

    I have a Honda mower that everytime I changed the oil it would immediately turn a dark gray color and blow white smoke right after it was started. Then the other day the mower died and oil was coming out of the air filter. What's up?
     
  2. Duekster

    Duekster LawnSite Fanatic
    from DFW, TX
    Posts: 7,961

    Bad rings I guess
     
  3. FYS777

    FYS777 LawnSite Silver Member
    Posts: 2,305

    i would think a blown head gasket. almost positive from your description.
     
  4. cgaengineer

    cgaengineer LawnSite Fanatic
    Posts: 15,782

    Are you overfilling the oil? Like Deukster said, bad rings cause blow by which will cause both smoke and higher crankcase pressures which will force oil through the pcv and into the carb.
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  5. herler

    herler LawnSite Fanatic
    Posts: 5,144

    I'll second the blown head gasket.
     
  6. cgaengineer

    cgaengineer LawnSite Fanatic
    Posts: 15,782

    Not sure how a head gasket would attribute to oil coming into the carb.
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  7. Duekster

    Duekster LawnSite Fanatic
    from DFW, TX
    Posts: 7,961

    You can often hear a blown head gasket as the compression leaks out.
     
  8. mowerknower

    mowerknower LawnSite Senior Member
    Posts: 766

    If this is on your HRX I can 100% promise you that you DO NOT have a blown head gasket.
     
  9. cgaengineer

    cgaengineer LawnSite Fanatic
    Posts: 15,782

    I don't know a lot about this particular mower engine but I agree with you...I think people associate whit smoke from head gaskets blown on water cooled engines...this is not the case here.
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  10. mowerknower

    mowerknower LawnSite Senior Member
    Posts: 766

    The HRX Honda has a CGV engine, it does not have a head gasket.
     

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