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Oil Leak

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Scott McCoy, Jan 31, 2018.

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  1. Scott McCoy

    Scott McCoy Junior Member

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    I have a 2010 prius. Recently I cleaned the intake manifold and egr valve. When I changed to oil the other day I noticed oil leaking and collected below the oil filter. After changing the oil I noticed oil leaking what , from the oil filter cover. I tightened the filter cover and it slowed down the leak but was still leaking. I then removed the filter cover and reinstalled the O ring. Same results. I am wondering if it may be leak somewhere above the filter and just showing up down hill. Any help would be appreciated.
     
    #1 Scott McCoy, Jan 31, 2018
  2. padroo

    padroo Senior Member

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    #2 padroo, Jan 31, 2018
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  3. Scott McCoy

    Scott McCoy Junior Member

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    Thank You
     
    #3 Scott McCoy, Jan 31, 2018
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  4. padroo

    padroo Senior Member

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    If you try this post how it works. Good luck.

    You can get a version of this at any automotive parts store.
     
    #4 padroo, Jan 31, 2018
  5. JC91006

    JC91006 Senior Member

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    The o ring does not sit on the lowest position on the housing, it sits 1 position higher than the very last position.

    Hope that makes sense
     
    #5 JC91006, Jan 31, 2018
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  6. Scott McCoy

    Scott McCoy Junior Member

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    Are you talking about, right below the treads?
     
    #6 Scott McCoy, Jan 31, 2018
  7. JC91006

    JC91006 Senior Member

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    It doesn't go below the threads, goes one notch up
     
    #7 JC91006, Jan 31, 2018
  8. JC91006

    JC91006 Senior Member

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    Like this Screenshot_2018-01-31-19-05-55.jpg
     
    #8 JC91006, Jan 31, 2018
  9. Scott McCoy

    Scott McCoy Junior Member

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    The picture did not show up
     
    #9 Scott McCoy, Jan 31, 2018
  10. Raytheeagle

    Raytheeagle Senior Member

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    Was it leaking oil prior to changing the oil?

    How fast was it dripping after reinstalling the oring?

    My guess is the gasket is improperly seated;).

    Keep us posted (y).
     
    #10 Raytheeagle, Jan 31, 2018
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  11. JC91006

    JC91006 Senior Member

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    Google where does an o ring go on an oil filter. Look at the images
     
    #11 JC91006, Jan 31, 2018
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  12. Raytheeagle

    Raytheeagle Senior Member

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    There’s a big groove for it too. But easily can be overridden:(.
     
    #12 Raytheeagle, Jan 31, 2018
  13. Scott McCoy

    Scott McCoy Junior Member

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    Yes, I noticed there was a leak before I changed oil, but then it leaked more after I changed it. It is not a drip drip, but is a slow ooze. On the filter cover there is a large space after the threads. does the O ring fit right under the threads or at the bottom?
     
    #13 Scott McCoy, Jan 31, 2018
  14. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    It fits in that space, not at the bottom. Here's a semi-explanatory picture from the Repair Manual. There's a better picture on the oil filter box, but I'd have to dig more to find:

    upload_2018-1-31_19-53-20.png

    Also, there's some component a little further up on the back wall that can leak oil, some sort of oil pressure sensor? There's been one or two instances of leaking from that, reported here.
     
    #14 Mendel Leisk, Jan 31, 2018
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  15. Scott McCoy

    Scott McCoy Junior Member

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    Thank You All. I will check this out tomorrow.
     
    #15 Scott McCoy, Jan 31, 2018
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  16. tvpierce

    tvpierce Senior Member

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    Here's the image Mendel referenced from the filter box. If you can look under my lableing that this is for my 2013 Prius, you can see the left side is designated "OK" the right side is designated "NG" (no good)
     

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    #16 tvpierce, Feb 2, 2018
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  17. Scott McCoy

    Scott McCoy Junior Member

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    Well, I went out this morning and changed the O ring to the correct position, but I still had a slow leak. It is very humbling to find out that after 9 years of doing something, you find out you have been doing it wrong. Like they say "live and learn". But it is not true that "you can't teach an old dog new tricks".

    If any have any ideas where the leak could be coming from and what I have to take off to find it.

    Thanks

    Scitt
     
    #17 Scott McCoy, Feb 2, 2018
  18. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    So oil filter O-ring was in wrong position?

    Here's info on the Oil Pressure Sensor. They suggest to remove front/right wheel, access through wheel well.
     

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    #18 Mendel Leisk, Feb 2, 2018
    Last edited: Feb 2, 2018
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  19. Scott McCoy

    Scott McCoy Junior Member

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    Yes, the O ring was in the wrong place. I will check the Oil Pressure Sensor in the morning. Thanks
     
    #19 Scott McCoy, Feb 2, 2018
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  20. Scott McCoy

    Scott McCoy Junior Member

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    OK, I checked the oil sensor and what I saw was the actual sensor looked fairly clean, but where the wire plugged into it was covered with oil and dirt. The oil went up the wire and down an adjacent wire. Just my thoughts would be that if it were the oil sensor would it not be leaking from around the threads and would not run up a wire. I'm thinking something above is leaking and the oil is running down the cable. I looked around the area and could not find the culprit. Any thoughts?
     
    #20 Scott McCoy, Feb 3, 2018
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