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Crankcase Positive Pressure

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by mg48, Mar 24, 2006.

  1. mg48

    mg48 New Member

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    I did my first oil change on an 06. Expecting to need to adjust the oil level I left the oil filler cap off while running the ICE to circulate the oil and fill the filter. While it was running I noticed a lot of gas (not gasoline) blowing out of the oil filler opening. I mean a LOT, more than I have ever seen coming out of a 200k mi V-8.

    Has anyone noticed tis on their Prius?
     
    #1 mg48, Mar 24, 2006
  2. tochatihu

    tochatihu Senior Member

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    Location:
    Kunming Yunnan China
    Vehicle:
    2001 Prius
    Yes my result is the same in 2001 Prius. I tested this in response to a similar post on greenhybrid. Was that you? Anyway, I offer no explanation of this situation.
     
    #2 tochatihu, Mar 24, 2006
  3. mg48

    mg48 New Member

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    Yep that's me. Thanks!
     
    #3 mg48, Mar 25, 2006
  4. Frank Hudon

    Frank Hudon Senior Member

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    most of the fine mist thrown out the oil filler cap when it's off is coming off the timing chain as it's rotating
     
    #4 Frank Hudon, Mar 25, 2006
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