2010 over fueling cylinder 1

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Sharnold, Apr 8, 2025.

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  1. Sharnold

    Sharnold Active Member

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    If one is misaligned, I figured you would have to take it back apart, unless there's a way you can use a punch to tap it back into place correctly
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    #21 Sharnold, Apr 18, 2025
  2. ASRDogman

    ASRDogman Senior Member

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    Depending on where it is, you might be able to get away with loosening and raising the camshaft.
    You can cable tie the chain to the sprocket. You might have to loosen, and remove, slowly, the
    chain tensioner to be able to carefully rotate the sprocket to remove it. Mark the chain and where
    it is on the sprocket so you can reinstall it in the same place.
    Reinstall the tensioner, and rotate the engine 720 degrees.
    And make sure the engine is at TDC!!

    Either way you look at it, if you want to fix it, you have to do something. If you have to remove the
    timing cover to reset the chain, it's less than a new engine.

     
    #22 ASRDogman, Apr 18, 2025
  3. Sharnold

    Sharnold Active Member

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    Timing and chain should be pretty straightforward and simple.
    I paint marked everything before I did the head
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    #23 Sharnold, Apr 18, 2025
  4. ChapmanF

    ChapmanF Senior Member

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    I wouldn't worry myself just over seeing the chain go limp-taut-limp-taut between the sprockets. The cam lobes have strong valve springs riding on them, so as you're cranking by hand the camshafts and sprockets will go from trailing to leading the chain and back again as the peaks of the cam lobes pass under the rockers.

    I don't have any advice to give about the tick you were hearing. Just wouldn't be worried by your description of the chain.
     
    #24 ChapmanF, Apr 18, 2025
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  5. Sharnold

    Sharnold Active Member

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    After loosening ( Loosening is the key word ) all the cam carrier bolts with the chain tensioner removed I could inspect all the rockers and caps.

    Nothing was out of the ordinary and the caps are all seated.
    So either I'm dealing with a lifter that's not oiling up or there's a possibility the cam carrier could have been over torqued on my behalf.
    My snap on big torque wrench only goes down to 30lbs and my little one only goes to 200 inch lbs so I guesstimated the initial 20ft lbs
    So now I'll be borrowing a torque wrench to reassemble and try again.
    Any more ideas before I reassemble again would be appreciated

    Posted via the PriusChat mobile app.
     
    #25 Sharnold, Apr 19, 2025
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  6. rjparker

    rjparker Tu Humilde Sirviente

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    Were all the head parts placed back in their original locations?

    IMG_8103.jpeg
     
    #26 rjparker, Apr 20, 2025
    Last edited: Apr 20, 2025
  7. Sharnold

    Sharnold Active Member

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    Yes I grew up building high performance engines and vehicles and always mark and disassemble in order and lay everything out on my work station.
    The caps are even in order.
    I've been doing prius a few years now and it's a first out of many many headgasket replacements.
    I'm thinking lifter tick like most of the dreaded Chrysler pentastar engines get.
    In those the rocker rollers fail and crush the lifter
    Posted via the PriusChat mobile app.
     
    #27 Sharnold, Apr 20, 2025
  8. Mendel Leisk

    Mendel Leisk Senior Member

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    Sounds like a 1/2” and 1/4” drive respectively? Get a 3/8” drive. There’s lot of inexpensive but decent ones with 5-50~ lb/ft range.
     
    #28 Mendel Leisk, Apr 20, 2025
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  9. Sharnold

    Sharnold Active Member

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    I'm just gonna borrow one till I break down and spend that kinda money for something I'd rarely use. Although a cheap harbor freight to throw around might not be a bad idea
    Posted via the PriusChat mobile app.
     
    #29 Sharnold, Apr 20, 2025
  10. Mendel Leisk

    Mendel Leisk Senior Member

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    My torque wrenches are all of the $30~40 CDN variety, none have died, and they all tested accurate, at least by my low-tech, DIY method. .
     
    #30 Mendel Leisk, Apr 20, 2025
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