Shudder, cylinder 3 misfire, check engine light

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Groundpounder17, Mar 6, 2019.

  1. padroo

    padroo Senior Member

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    I see a lot of bad reviews and have not used one myself and it looks like everyone is using the same manufacturer and putting their name on it. Buyer beware!
     
  2. Mendel Leisk

    Mendel Leisk Titanic Social Director

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    The Repair manual says to torque to the spec'd value, paint a mark on the head of the bolt, then go another 90 degree, and a further 45 degrees. This doesn't seem ultra critical.

    Also, has anyone mentioned the bi-hexagonal socket driver. If you google that you'll find lots of sources, on Amazon.

    upload_2019-3-7_16-31-29.png
     
  3. The Critic

    The Critic Resident Critic

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    It's also a 12mm bi-hexagonal wrench, not 10mm. Don't ask me how I know this - I specifically paid $40 for the AST 10mm bi-hexagonal wrench to find out that it is the wrong size.

    Note: I used a triple-square bit in lieu of the proper bi-hexagonal. I heard they are similar but not identical. But it worked fine for me...
     
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  4. Mendel Leisk

    Mendel Leisk Titanic Social Director

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    You were for sure the first one removing those bolts? Grasping at straws...

    FWIW, here's a Toyota tool description and part number:

    Toyota tool: 10MM BI-HEXAGON SOCKET p/n: 09013-7C310
     
  5. Mendel Leisk

    Mendel Leisk Titanic Social Director

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    Noticed this comment, on a replacement head bolt amazon page, coroborates your experience:

    upload_2019-3-7_18-11-22.png
     
  6. Groundpounder17

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    Can anyone give me the correct number for the head bolts? I can’t find it on Camelback Toyota website.

    What about the belt and idler pulley? Do they need replacing too?
     
  7. Mendel Leisk

    Mendel Leisk Titanic Social Director

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    At about 17:50 in the video I linked (first page, post #12), he describes the head bolt socket as "number 12", which I think means 12 mm. Snap-On I think?
     
  8. Mendel Leisk

    Mendel Leisk Titanic Social Director

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    Head bolt part no's are in this tsb:
     

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  9. Groundpounder17

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    Thanks. I’ve added the head bolts to my cart.

    I found the part number for the Toyota wrench but it looks like 10mm and worried the head bolts will be 12mm.

    Nevermind on the serpentine belt question lol
     
    #49 Groundpounder17, Mar 7, 2019
    Last edited: Mar 7, 2019
  10. The Critic

    The Critic Resident Critic

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    Mine were 90910-02166. So it may be different depending on VIN (or it was superseded); I had my parts guy look up by VIN.

    IMG_4756.jpg
     
  11. The Critic

    The Critic Resident Critic

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    I am the original owner of my Prius and I have never had any head work done.

    The socket was still on my workbench. It is definitely a 12mm “XZN.” Not saying it is the correct one, but it fit securely and I was able to do the job.

    IMG_4758.jpg
    IMG_4759.jpg
     
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  12. Avi's Advanced Automotive

    Avi's Advanced Automotive Independent hybrid repair shop

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    You probably used a 12mm triple square. The correct tool is a 10mm double hex. The angles of the points are different, buy the 12mm triple square will usually work.

    If anyone reading this would like to know, here is my recommendation:

    CTA Tools 9295 Toyota Head Bolt Wrenches –Double Hex 1/2-Inch Square Drive Set


    Posted via the PriusChat mobile app.
     
  13. Mendel Leisk

    Mendel Leisk Titanic Social Director

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    Here's a pdf of triple square dimensions:

    http://www.metalnerd.com/content/assets/43/439614/Specialty_Bits_and_Drivers/triplesquaretable.pdf

    The point-to-point dimension of a M12 triple square is indicated as 11.6 mm.

    If I draw a hexagon with 10 mm face-to-face, the point-to-point dimension is 11.547

    Here's a 12mm triple square (magenta) per the pdf dims, superimposed with a bi-hex 10 mm (cyan):

    upload_2019-3-9_19-55-54.png
    The (magenta) triple square protrudes slightly more at the points:

    upload_2019-3-9_19-59-55.png
    That's in mm's, and jives with (11.6-11.547)/2

    There'll be some tolerance factor in the bi-hexagon, I've just drawn it 10 mm face-to-face exact.
     
    #53 Mendel Leisk, Mar 9, 2019
    Last edited: Mar 9, 2019
  14. The Critic

    The Critic Resident Critic

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    Thanks!
    Now that makes perfect sense. Thanks for the analysis.
     
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  15. working1

    working1 Member

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    The "Torque Turn to Tighten" method is done to achieve a consistent clamping force. Suggest following the procedure exactly as described.

    http://www.boltscience.com/pages/a-case-study-in-torque-angle-tightening.pdf
     
  16. Mendel Leisk

    Mendel Leisk Titanic Social Director

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    I recall a while back someone mentioning that a 10 mm hex wrench fit perfectly. Obviously not the right tool, but corroborates the size/shape.

    I'd still like to understand the underlying dimension of the triple square series. An M12 for example, does it have a 12 mm dimension in some direction? You'd think so. AutoCad's good for sussing out stuff like that.

    Off-topic rambling:

    I was a draftsman and checker for years, and one thing I found frustrating was translation of measurement method. A case in point was a tunnel, and conveyor belt line, shown on Materials Handling arrangement drawing with slope of 1.1935 degrees. I went around asking everyone what was with this number; no one could come up with an explanation, recall where it came from.

    One of the Structural draftsmen wandered over, said he recalled it was 1/4" in 12" pitch, at the outset.

    upload_2019-3-10_9-54-49.png
     
    #56 Mendel Leisk, Mar 10, 2019
    Last edited: Mar 10, 2019
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  17. Groundpounder17

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    Picked up the head
     

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  18. Raidin

    Raidin Active Member

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    Had this issue and posted in other threads detailing it from other users. Turned out to be the intake manifold getting gummed up where the EGR system connects to it. Replacing the manifold solved the problem.

    Misfire and Air-fuel ratio imbalance | PriusChat
     
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  19. Groundpounder17

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    I’ve been soaking parts on hot water, oxyclean and purple power. I’ve also pressure washed a lot. The intake and EGR were filthy....so was the injectors
     
  20. Groundpounder17

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    Clean parts. You can see through the cooler when light is in the background, but I still haven’t got that broken wire out
     

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