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blown head gasket P0301 P0302 P0300 ?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Alain D, Aug 11, 2024.

  1. Alain D

    Alain D Junior Member

    Joined:
    May 23, 2019
    25
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    0
    Location:
    Santa Cruz, CA
    Vehicle:
    2014 Prius
    Model:
    II
    Update: took the better part of the day to get to the gasket (those videos make it look so fast ;) - looks like I have some revised HG and not the original 2 tone one. My serial was a few thousands cars after they switched to new o-ring design late 2014 (thank god!) so at least oil burning shouldn't be an issue (hasn't). All the parts are super clean with 0 varnish! looks new. prev owner must have done proper 5k oil changes and not 10k.

    the head bolt are on SO TIGHT even with a very long 1/2" breaker bar it's takes some muscle. make sure to get the exact 'double hex' part as I wouldn't want to take a chance to round them off! and remove any oil in the head to make sure it's 100% seating (maybe not issue with incorrect 12pt as oil can ooze out ?)

    DO GET NEW ONE: I got the felpro ones (should be high quality) as they are less than half (over $100 at dealer!)

    Note: I forgot how hard it is to get that damm egr cooler (been 5y) ! the HG video does mentioned leaving one of the bolt out to make it much easier next cleanup (the back sideway one) which I surely will. By far the hardest part (and the main coolant line bolt access...

    My intake 1 had a ton of oil (OCC was the fullest I've seen as well) so time to replace again the pvc valve (maybe I got a knockoff on amazon. dealer this time).

    now time to put it back(y)
     

    Attached Files:

    #21 Alain D, Aug 25, 2024 at 12:10 PM
    Last edited: Aug 25, 2024 at 12:17 PM
    Mendel Leisk likes this.
  2. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    55,854
    38,877
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    You made it ok, so in the rear-view, but if you haven't seen it, this video is good. Doesn't make it any easier, but tips to avoid snapping off a bolt head:



    Disclaimer: never done any of this personally.