2011 Prius Head Gasket Failure

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by The Critic, Feb 28, 2019.

  1. mjoo

    mjoo Senior Member

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    Yes it does. Clogged external EGR raises engine temps. An internal EGR cannot clog.

    Pixel XL ?
     
  2. Caballo Prieto Azabache

    Caballo Prieto Azabache Junior Member

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    Good to know. Thank you!
     
  3. Caballo Prieto Azabache

    Caballo Prieto Azabache Junior Member

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    Wow, super clean engine Critic! I can't believe these are the "before" pictures. I hope my engine looks half as good as yours after I'm done with the repair. I removed the cylinder head cover and there is milkshake-like sludge everywhere.
     
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  4. jack black

    jack black Active Member

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    The Critic,
    did you see this HG failure analysis below?
    2010-2012 Head Gasket failure analysis | PriusChat
     
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  5. jack black

    jack black Active Member

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    didn't he say corollas fail too? i guess not as often?
     
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  6. jack black

    jack black Active Member

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  7. The Critic

    The Critic Resident Critic

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    I did a search over on ToyotaNation and this is what I was able to find:

    random missfires? - Toyota Nation Forum : Toyota Car and Truck Forums

    '09 Corolla 1.8L Rough Idle - With a New Twist - Page 2 - Toyota Nation Forum : Toyota Car and Truck Forums

    2009 Corolla with engine misfiring (Codes P0300, P0301, P0302) - Toyota Nation Forum : Toyota Car and Truck Forums

    2009 Corolla Antifreeze Leaking into Cylinder - Toyota Nation Forum : Toyota Car and Truck Forums

    Head Issues - Toyota Nation Forum : Toyota Car and Truck Forums

    2009 Toyota Corolla Rough idle in gear problem - Toyota Nation Forum : Toyota Car and Truck Forums

    Lost my compression - Toyota Nation Forum : Toyota Car and Truck Forums

    Need help after replacing the Head Gasket - Toyota Nation Forum : Toyota Car and Truck Forums

    The common themes are:
    - Misfire, often cyl 1 and 2. Sometimes cyl 4.
    - The issue often develops between 125K-150K.

    There have been failures on the 2014 and 2015 models as well. There are fewer of them at this point due to the age, but it does not appear that the later model years are immune.

    No, stop leak products (unless OEM approved ones, such as the Subaru formula) will clog the heater core and the coolant passages. I would avoid.
     
    #87 The Critic, Apr 16, 2019
    Last edited: Apr 16, 2019
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  8. Raytheeagle

    Raytheeagle Senior Member

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    You should see what he does when he details:

    EGR Evangelist’s car receives a light clean-up and Optimum Gloss-Coat

    A bit OCD, but looks fantastic (y).
     
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  9. The Critic

    The Critic Resident Critic

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  10. Raytheeagle

    Raytheeagle Senior Member

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    Rainy yesterday ;).

    The Prime had some beading but the 2010 was garaged so nothing there:).

    I’ve booted it out for now and the Prime is in its new spot in the garage(y).
     
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  11. SFO

    SFO Senior Member

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    Now I'm curious how we can explain @The Critic 's head gasket failure given his meticulous preventative maintenance, including the EGR circuit service well before the problem surfaced. It seems there was no way he could've avoided such.
     
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  12. The Critic

    The Critic Resident Critic

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    And the Corolla’s without EGR still experienced head gasket failure...
     
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  13. cnc97

    cnc97 Senior Member

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    Bad head gasket design?
     
  14. mjoo

    mjoo Senior Member

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    Preemptive headgasket replacement? At least that way you won't have to machine the block... :D
     
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  15. mjoo

    mjoo Senior Member

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    As I recall, Critic's EGR cooler was first cleaned at 180k miles.

    Unfortunately we can't weed out percentages of HG failures cause by EGR cooler vs poor headgasket design vs poor water pump design without a real ($$$) scientific study...
     
    #95 mjoo, Apr 17, 2019
    Last edited: Apr 17, 2019
  16. Mendel Leisk

    Mendel Leisk Sunday driver DIY’r

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    Maybe a good interval for EGR cleaning would be the same as engine coolant change: 100K miles and 50K miles thereafter. Or if you want to be really safe, just every 50K miles.

    It's often mentioned that it's a good idea to sync EGR cleaning with engine coolant change, since coolant lines need to be disconnected in the course of EGR cooler cleaning.

    I've found though, just draining a couple of quarts from the radiator (into clean container) drops the coolant level below the whole EGR system. When everything is back together pour the coolant back into the reservoir.

    Bottom line, don't think you have to stall till coolant change time.
     
  17. jack black

    jack black Active Member

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    good point. i wonder if the subaru's juice is compatible with Toyota's pink coolant.

    i mentioned that link to a specific product because a 2010 prius owner used that (it came up on google search).

    edit, just found it on BITOG:
    "You would be lucky if anything will work.
    Go to a Subaru dealer, and buy the Subaru coolant conditioner. Last bottle I bought cost about $4. It's made by Holts. Not sure which Holts formulation it is though.
    Subaru SOA635071 OEM Coolant System Conditioner
    Its a Ginger root formula, the same thing as GM or Bars Leak tabs. Holts/Subaru just added the water and mixed it up for you."
    Toyota 1GR-FE V6 head gasket stop leak additive - Bob Is The Oil Guy
     
    #97 jack black, Apr 17, 2019
    Last edited: Apr 17, 2019
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  18. jack black

    jack black Active Member

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    update: i did searches on Bar's Leaks tabs and reviews are great with no problems. some people swear that GM puts 2 of them in the factories in every new car.

    here is my plan: when i do my 100,000 miles coolant/spark plug/EGR/brake fluid change, those tablets go in to prevent small HG leaks. who knows, maybe Toyota will follow Subaru on those?
     
  19. The Critic

    The Critic Resident Critic

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    True, the EGR cooler was first cleaned at 180K miles. However, the cooler was not blocked and the flow was not significantly impeded.
     
  20. The Critic

    The Critic Resident Critic

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    UPDATE:

    It has been almost 4K miles since the head gasket repair. So far there have been no issues with misfires, coolant loss, rattling or unusual oil consumption.

    I plan to do an oil analysis at the 190K oil change to check for any coolant in the oil.
     
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