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2014 Prius V want to avoid head gasket problems

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by Mountweasel64, Feb 20, 2024.

  1. Mountweasel64

    Mountweasel64 New Member

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    I just bought a 2014 Prius V for my mother. It has a couple of small issues, but I’ve read here they’re subject to head gasket failure possibly caused by a clogged Egr. I’d like to proactively clean this to avoid future problems. Is there a write-up to show how to do this and what to look for? anything else I need to do or look at on this car?
     
  2. rjparker

    rjparker Tu Humilde Sirviente

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    How many miles?

    Since it is a 2014 the vin you have is important to determine if it has revised pistons and rings. Plus to determine if you have the latest ecu firmware.

    Miles and vin become a big predictor. Egr cleaning is essentially important if it throws an egr code, meaning it’s blocked. Outside of Priuschat, dealer master mechanics and Toyota don’t see egrs as the cause.

    Everyone agrees 5k oil changes are essential. Most agree on coolant changes around 60k intervals.
     
    #2 rjparker, Feb 20, 2024
    Last edited: Feb 20, 2024
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  3. Mendel Leisk

    Mendel Leisk Senior Member

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    See first couple of links in my signature, for EGR cleaning info. There's also a couple of head gasket related links. On a phone turn it landscape to see signature.

    I'd second that.
     
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  4. Mountweasel64

    Mountweasel64 New Member

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    Well that’s interesting.
    I don’t have an Egr code, but I’ll check it anyways.
    Anything’s possible, but a clogged Egr leading to a blown head gasket seems like a stretch at first glance.
    JTDZN3EU9E3324477
    Is there somewhere I can enter the VIN to see if it has updated pistons and rings?
    It has about 144k miles.
    I think I read something about a recall or service campaign on gen 3, is that a thing?
     
  5. Mendel Leisk

    Mendel Leisk Senior Member

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    With 144K miles I would get on EGR cleaning soon. My 2 cents: every 50K would be optimum, and if that's not going to happen, at most 100K before first cleaning.

    Check against the attached doc.
    Hey, you're welcome.
    The one EGR related notice I got was this:
    IMG_3487.jpeg
    I especially like the "while the majority of vehicles will not experience this condition" bit.
     

    Attached Files:

    #5 Mendel Leisk, Feb 21, 2024
    Last edited: Feb 21, 2024
  6. rjparker

    rjparker Tu Humilde Sirviente

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    Looks like your vin is before the piston and ring change. So it’s essential you do 5k oil changes like your wallet depends on it.

    IMG_4369.jpeg

    The ecu update is questionable as well since it is only sure in v’s built in Oct 2014, which normally would have been the refreshed 2015 v wagon.

    But there were egr and intake manifold upgrades that may have installed the latest ecu calibration id (software).

    IMG_4372.jpeg
    You will have one of the three 2014 versions above. Toyota Techstream and Car Scanner Pro can read the current id. A dealer would be the best option for updating if needed but it is likely to be a hours labor.

    Car Scanner Phone App used with Bluetooth OBD2 Interface
    IMG_4330.jpeg
     
    #6 rjparker, Feb 21, 2024
    Last edited: Feb 21, 2024
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  7. Mountweasel64

    Mountweasel64 New Member

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    JTDZN3EU9E3324477
    144k miles
    Where can I check the vin to see if I have updated pistons, rings, firmware?
    Clogged egr causing blown head gasket does seem a stretch, but anything’s possible.
    Will 5k oil changes affect head gasket life, or just engine life in general?
     
  8. bisco

    bisco cookie crumbler

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  9. Mendel Leisk

    Mendel Leisk Senior Member

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    Apologies for my previous response.
     
    #9 Mendel Leisk, Feb 22, 2024
    Last edited: Feb 22, 2024
  10. Mendel Leisk

    Mendel Leisk Senior Member

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    Apparently my attachment might not cover OP's VIN. @rjparker's info does though. Sorry about that.
     
  11. FloridaPriusGuy

    FloridaPriusGuy New Member

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    Clean out the egr radiator once, then install an oil catch can! This was the best thing I did. Several years ago I bought a Prius V with 200k miles and a blown gasket. After weeks of trying workarounds, I ended up replacing the engine. She now has 300k miles and still gets 42mpg average. Accessing the egr manually is very difficult, but it’s doable. The biggest issue is that the pcv valve is sideways - so when the valve redirects gas from the crank case back into the air intake, some oil can go with it. The catch can goes in between the pcv valve and the air intake. Every time we change the oil, several ounces of oil comes out of the catch can! All that oil would have ended up in the air intake system ultimately causing “dirtier” combustion and more gunk in the egr radiator. I change the oil every 6k miles, and when I do the old oil still looks relatively clear and fresh. The engine runs substantially cleaner with an oil catch can installed, it’s a great inexpensive addition I recommend it to anyone.
     
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  12. jzchen

    jzchen Newbie!

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    Replace coolant more frequently…
     
  13. Mendel Leisk

    Mendel Leisk Senior Member

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    Every time I read the stinkers in that missive from toyota (in post 5) I go into a slow burn:

    We are taking this action to assure you that we stand behind our product and to enhance your ownership experience

    Yeah right:

    upload_2024-2-25_11-8-39.png
     
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  14. Tim Jones

    Tim Jones Senior Member

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    Your not going to avoid the Blown Head Gasket.
    Get rid of it while u can.
     
  15. ChapmanF

    ChapmanF Senior Member

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    Seeing how, in that document, "this condition" ⬄ "a sticking EGR valve due to excess carbon buildup", maybe they're right.

    I've personally encountered, and seen reports of, EGR valves with ski-jump ruts, and EGR coolers that are clogged.

    I've never personally seen, and maybe read one PriusChat report of, "a sticking EGR valve due to excess carbon buildup". Maybe that condition really doesn't crop up as often as some others?
     
  16. rjparker

    rjparker Tu Humilde Sirviente

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    Toyota’s solution is a new egr valve and the updated software. That will fix P0401s from sticking, wear, mechanical failure or air leaks, all of which trip the so called “insufficient flow” code because pressure did not change according to the algorithm.

    Totally clogged egr cooler when they get in there to change the valve? Yes a P0401 is possible but Toyota would change the cooler and engine. It takes excessive oil consumption to get there. The intake and head would also be heavily coated as well.

    This is a more typical sequence of events:
     
    #16 rjparker, Apr 5, 2024
    Last edited: Apr 5, 2024
  17. Mendel Leisk

    Mendel Leisk Senior Member

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    Maybe 4th Gen EGR valve has a metal ski ramp?

    I wonder too, if carbon clogging can cause the EGR valve to perform differently, say activating more, or through an increased range, something that taxes the ski ramp more than the designers anticipated.