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joining the club... head gasket specific questions

Discussion in 'Gen 3 Prius Technical Discussion' started by Eddie25, Feb 15, 2024.

  1. Eddie25

    Eddie25 Active Member

    Joined:
    Dec 31, 2018
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    Location:
    IL
    Vehicle:
    2011 Prius
    Model:
    III
    Joined the club this week. 222K, Won't bore you with too many details, but I only experienced about 3-4 instances of running rough and no noticeable coolant loss, so I caught it quick at least. CEL came on as I was pulling into the garage. I have a lot of the prep work already done as I await parts.

    First question:

    How are you all torqueing the crankshaft bolt? I know some people just impact it back on, but I'd like to try to get it torqued correctly.

    Any clever DIY tools? I can fabricate decently, should I just build a Y bar with bolts through it? Anything even easier than that?
     
    #1 Eddie25, Feb 15, 2024
  2. JC91006

    JC91006 Senior Member

    Joined:
    Nov 10, 2013
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    Location:
    Los Angeles, CA
    Vehicle:
    2008 Prius
    Model:
    II
    CEL doesn't mean you have a bad head gasket. You might just have some emissions issues. Unless you want to tackle the HG now, you might want to find the reason for the CEL
     
    #2 JC91006, Feb 15, 2024
  3. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
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    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Yeah, you’ve got to restrain it somehow, or just use impact lol. Funny thing is, it’s just to hold on this beltless pulley.

    have you done boroscope inspection?
     
    #3 Mendel Leisk, Feb 15, 2024
    Last edited: Feb 15, 2024
  4. Eddie25

    Eddie25 Active Member

    Joined:
    Dec 31, 2018
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    Location:
    IL
    Vehicle:
    2011 Prius
    Model:
    III
    It’s been confirmed with borescope.
     
    #4 Eddie25, Feb 15, 2024
    Mendel Leisk likes this.
  5. Eddie25

    Eddie25 Active Member

    Joined:
    Dec 31, 2018
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    Location:
    IL
    Vehicle:
    2011 Prius
    Model:
    III
    Anyone know thread pitch for the two crankshaft pulley holes off hand?
     
    #5 Eddie25, Feb 15, 2024
  6. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,671
    39,221
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    M8x1.25, same as the brake rotor threaded holes. They're 86~ mm c/c.
     
    #6 Mendel Leisk, Feb 15, 2024
    Mr. F and Eddie25 like this.
  7. Mr. F

    Mr. F Active Member

    Joined:
    Sep 21, 2020
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    Location:
    Washington
    Vehicle:
    2010 Prius
    Model:
    IV
    I used a loaner fan clutch holding tool with two M8-1.25x45 mm socket head cap screws from Home Depot. Grade 12.9 is necessary to resist yielding.
    [​IMG]
     
    #7 Mr. F, Feb 15, 2024
    TheMainePrius, Eddie25 and Mendel Leisk like this.
  8. Eddie25

    Eddie25 Active Member

    Joined:
    Dec 31, 2018
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    Location:
    IL
    Vehicle:
    2011 Prius
    Model:
    III
    Excellent, I will try exactly that. Thanks!
     
    #8 Eddie25, Feb 15, 2024
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