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Oil Catch Can, Eliminate that knock!

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by danlatu, May 22, 2017.

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  1. danlatu

    danlatu Senior Member

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    Oil smell is from an air leak in a connector, hose or occ. Burning very small amounts of evenly distributed oil/water/fuel vapor is not terrible, it just causes fouled spark plugs, clogged piston rings, dirty valves/seats, decreased mpg, early egr failure, clogged egr ports in intake manifold, dirty map sensor (lack of power/stalling) carbon build up on pistons/heads with irregular compression and burning oil. It is the cold start knock from oil/water/fuel that is pooled up in the intake manifold that will blow a head gasket.
     
    #1341 danlatu, Apr 19, 2019
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  2. Grit

    Grit Senior Member

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    I have an oil extractor with a 6ft straight tip, is that something worth syphoning out the oil pool on the terms that no oil gets on the throttle plate and any other surface on engine parts?
     
    #1342 Grit, Apr 21, 2019
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  3. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Who knows how much stuff goes through, doesn't pool there?
     
    #1343 Mendel Leisk, Apr 21, 2019
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  4. The Critic

    The Critic Resident Critic

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    You will have to enlighten us on how that is possible...
     
    #1344 The Critic, Apr 22, 2019
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  5. The Critic

    The Critic Resident Critic

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    This post does not help your credibility. ATP205 has a conditioning effect on rubber seals. Piston rings are metal. ATP205 cannot “swell” piston rings.
     
    #1345 The Critic, Apr 22, 2019
  6. danlatu

    danlatu Senior Member

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    Where did I say piston rings???

    5C4BED55-DEA9-47FB-978E-C87E8E404514.jpeg 880F8E45-89FD-48C1-86D3-A188CABC9ECF.jpeg
     
    #1346 danlatu, Apr 22, 2019
  7. The Critic

    The Critic Resident Critic

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    #1347 The Critic, Apr 22, 2019
  8. danlatu

    danlatu Senior Member

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    D58EA98F-215D-46FA-8118-4796FF2AC9D8.jpeg
    Seals and “O” rings are the same. I just replaced 2 rubber “O” rings on my power steering pump on my truck. Did not need to replace the whole power steering unit.
     
    #1348 danlatu, Apr 22, 2019
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  9. danlatu

    danlatu Senior Member

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    14 parts air 1 part fuel is how combustion works. When an engine has fluid (oil/water/fuel) that is sucked into the combustion chamber, the ratio is no longer 14 parts air 1 part fuel. This creates a temporary knocking/hydro lock inside the combustion chamber that can destroy a head gasket, bend rods and stretch head bolts. Fluid is an incompressible solid. Oil/water/fuel is not suppose to be in the intake manifold. The gen3 prius has an intake manifold that likes to trap this fluid in two area's from the pcv system. Prii in cold, humid, short driving trips will experience more build up in the intake manifold than others. Oil/water/fuel rests in the area's circled in brown.



    Screen Shot 2019-04-22 at 7.03.56 PM.png
    Screen Shot 2019-04-22 at 6.48.16 PM.png
     
    #1349 danlatu, Apr 22, 2019
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  10. danlatu

    danlatu Senior Member

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    Oil/water/fuel accumulates under the throttle body. You can either remove the entire intake plenum to clean, use a rag or vacuum pump it out when throttle body is open.

     
    #1350 danlatu, Apr 22, 2019
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  11. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    I'm trying to ditch my Oil Catch Can accumulations, mixed it in with drained engine oil, took the mix to Mr. Lube to be poured into their waste oil tank. Trouble is, the OCC stuff settles to the bottom. I'll have to give it a swirl just before handing the container to them next time. It's pretty sorry-looking stuff.
     
    #1351 Mendel Leisk, Apr 22, 2019
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  12. Raytheeagle

    Raytheeagle Senior Member

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    Swirl away;).

    At least there’s a way to get rid of it (y).
     
    #1352 Raytheeagle, Apr 22, 2019
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  13. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Yeah, beats shooting it into the combustion chamber, not exactly Top Tier gas. :rolleyes:
     
    #1353 Mendel Leisk, Apr 22, 2019
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  14. Raytheeagle

    Raytheeagle Senior Member

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    Probably similar to the stuff you buy at a place like Rotten Robbie’s:whistle:.

    How fast does it separate when in the waste can?

    You could always change it up and get a non transparent container;).

    That’d save the swirl before return(y).
     
    #1354 Raytheeagle, Apr 22, 2019
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  15. Bay Stater

    Bay Stater Senior Member

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    Or you can take the OCC fluid collections to the recycling center. :eek:
     
    #1355 Bay Stater, Apr 23, 2019
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  16. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    I think you're kosher to add OCC accumulations to waste engine oil. The stuff is coming from a a pcv valve on the crankcase wall, and that valve is at the end of a crude labyrinth, that catches some of the gunk and returns it to the oil, so you're just being a bit more efficient at waylaying the stuff.

    It's not a very nice brew though.
     
    #1356 Mendel Leisk, Apr 23, 2019
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  17. James Powers

    James Powers Senior Member

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    Welp, fellas.... It happened... Got the knock that set off a check engine light with a misfire code on cylinder 1... Took it in, compression test, blooooown head gasket.... The OCC was on my list of mods to do! Looks like after it gets fixed, it will be expedited to the top of the list!
     
    #1357 James Powers, Apr 24, 2019
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  18. scona

    scona Active Member

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    Ouch, how to get your day spoiled. What is the mileage?
     
    #1358 scona, Apr 24, 2019
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  19. Grit

    Grit Senior Member

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    Sorry to hear that, was hoping to see your blizzard pearl at some SF meet up. If there’s any mods your parting out, let me know if decide to pass on the Prius.
     
    #1359 Grit, Apr 24, 2019
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  20. James Powers

    James Powers Senior Member

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    Big time, right? It has 147k on it but I bought it with 82k and while I am pretty sure the regular maintenance was done, but the EGR was probably never cleaned (it was a fleet vehicle so it had all maintenance) - which was on my list to tackle this weekend...
     
    #1360 James Powers, Apr 24, 2019
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