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My turn for a 2010 head gasket

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by HomeyClown, Nov 5, 2017.

  1. HomeyClown

    HomeyClown Junior Member

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    I am getting to enjoy my first Toyota engine head gasket. I have a question that I am hoping someone will be able to steer me in the right direction. The manual says

    (d) Apply approximately 150 kPa (1.5 kgf/cm2, 22 psi) of air pressure to the hole pricked in procedure A to release the lock pin.

    Where is this lock pin and how do I know its released? It looks like I could just remove the tensioner, remove the left sprocket and that would give enough slop in the chain for the right but this pin thing has me kind of puzzled. Thanks!


    timing.jpg
     
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  2. Raytheeagle

    Raytheeagle Senior Member

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    @leeb18c is going through a head gasket replacement currently.

    Here’s a link to his thread:

    Another blown head gasket.

    Good luck and post some pics(y).
     
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  3. danlatu

    danlatu Senior Member

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    Remove the engine mount pulley and the entire timing chain cover first. The timing chain tensioner is attached to the timing chain cover. This engine is nothing like a honda engine. When the cover is off, you will have enough play to remove the timing chain and then head will come off.
     
    #3 danlatu, Nov 5, 2017
    Last edited: Nov 5, 2017
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  4. HomeyClown

    HomeyClown Junior Member

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    Well I am sorry to say the engine has to come out. Im kind of slow and trying to do this in the car isn't gonna work out for me.

    I have the crank pulley off and have located and removed 8 bolts that separates the engine from the ecvt. Its kind of hard to see around the engine. I have looked around for pictures to get a count of how many bolts there are holding them together without luck.

    can anyone point me to a picture or provide a count of bolts holding the two together and if there is anything else secret to getting the engine off the transmission so I can get it popped apart?

    I will provide pictures when I have something interesting.
     
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  5. danlatu

    danlatu Senior Member

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    This will help. Here is the ----> manual
     
  6. HomeyClown

    HomeyClown Junior Member

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    I have it thanks, just finding information like how many bolts are used to connect the engine to the transmission in 7500 pages of crap is challenging. Plus I say vibration dampner they say crank pulley so its all one great adventure.

    if you would answer these two questions it would be appreciated! :)

    provide a count of bolts holding the two together and if there is anything else secret to getting the engine off the transmission so I can get it popped apart?


    I mean in a regular car you have the torque converter to get the bolts out of, does the spline just pull out of this engine or are there any bolts inside I need to worry about.
     
  7. ChapmanF

    ChapmanF Senior Member

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    When my dad was teaching me to swim, he said I shouldn't worry how deep the water is because the idea was to swim on the top. :) Likewise the manual may be however many pages it is, but the contents links and hyperlinks are usually the way to swim around in it.

    But another resource that's often valuable can be the parts diagrams at parts.toyota.com. Like this one:

    [​IMG]

    Does that help?

    -Chap
     
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  8. danlatu

    danlatu Senior Member

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    8 bolts + or - Sorry don't remember. Spline pulls straight out like a manual. You will still need to look through the manual for all the torque specs. It is impossible for me to remember. I have personally owned 22+ cars.
     
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  9. HomeyClown

    HomeyClown Junior Member

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    [QUOTE=" Spline pulls straight out like a manual..[/QUOTE]
    That's what I wanted to hear thanks! These little toy engines and my pry bar can break something quick so I rather ask to keep me safe
     
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  10. HomeyClown

    HomeyClown Junior Member

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    Thanks for the picture chapman. site appears to be acting up this morning.
     
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  11. HomeyClown

    HomeyClown Junior Member

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    Tree.jpg A true shade tree mechanic!
     
  12. Mendel Leisk

    Mendel Leisk Senior Member

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    A long way from the Japanese assembly plant, lol.
     
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  13. HomeyClown

    HomeyClown Junior Member

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    Looks like cylinder 1 and two were leaking. But no bent rod yea!!! piston 1.jpg piston2.jpg
     
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  14. Mendel Leisk

    Mendel Leisk Senior Member

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    Number one at right end?
     
  15. danlatu

    danlatu Senior Member

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    Cylinder 4. Closest to the transmission/drivers side.

    Screen Shot 2017-11-19 at 7.54.33 PM.png
     
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  16. HomeyClown

    HomeyClown Junior Member

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    The head appears to be clogged with crystals from the coolant. I would guess that would come into the cause. It has 200k on it. It looks pretty good otherwise. I was going to work the head myself but if the machine shop can get it cleaned out and right before thanksgiving it would give me some time to finish the battery on my gen 2. pack.jpg


    Its repair has suddenly become a priority since my son modified his civic last week

    ben2.jpg

    No injuries, his fault, hope he learned something from it. Shame about the car cause it was mint, and I had reworked the head with studs, would have lasted another 100k but now he will get a prius and get better gas mileage.
     
    #16 HomeyClown, Nov 19, 2017
    Last edited: Nov 19, 2017
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  17. leeb18c

    leeb18c Active Member

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    Your water leak into piston has prominent marks and looks like water injection really cleanup those two pistons from deposits. On my engine blocks I don't see such marks.
     
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