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Timing mess up

Discussion in 'Gen 3 Prius Technical Discussion' started by blairsie, Nov 2, 2021.

  1. blairsie

    blairsie Junior Member

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    I replaced the head gasket, got everything back together. Fired it up, have a loud ticking from the engine and a p0016 code. Obviously I screwed up the timing when I put the chain back in. I thought I had it lined up correctly to all three marks. Is there any way of fixing this short of tearing it back down all the way to the timing chain.
     
  2. ASRDogman

    ASRDogman Senior Member

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    You'll have to remove the timing cover to be able to get it set correctly.
     
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  3. blairsie

    blairsie Junior Member

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    Yep. That’s what I thought. Man, I really got in over my head (no pun intended) with this one
     
  4. rjparker

    rjparker Tu Humilde Sirviente

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    Some guys have opened it up three times to get the timing right
     
  5. Bossoutlaw

    Bossoutlaw Junior Member

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    I’ve done the same thing. Replaced head gasket, then a P0016. I don’t have a tick/knock but I am getting the code, the engine is running fine, so I’m guessing that I’m off by very little. I’m trying to figure out how to do it properly before I redo it. Does anyone know of the vvt-i is supposed to be advanced or retarded when setting the chain? I’m having trouble finding a definitive answer. I’m working on a 2011. If it’s supposed to be advanced/retarded what is the procedure?
     
  6. edthefox5

    edthefox5 Senior Member

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    Pretty good video. Like how you get to see the results of using head gasket sealer. Dumbest product ever.

    He address the tick tok too.

    I don't see him rotating the engine to release the chain tensioner actuator though after re-installing it. Maybe its different than the Corolla.

    He does the whole job in an hour not counting the sealer mess that took out the rad too.

     
    #6 edthefox5, Feb 15, 2022
    Last edited: Feb 15, 2022
  7. ChapmanF

    ChapmanF Senior Member

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    I'm not convinced it would matter much, just because the timing marks are on the same part with the chain sprocket anyway. As long as those are lined up properly and the chain doesn't skip, the timing adjuster will just do its own thing.
     
  8. James P OHare

    James P OHare New Member

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    Here's another timing chain video I found useful.

    The tensioner can also be released via long screwdriver if the valve cover is off.
     
  9. Mendel Leisk

    Mendel Leisk Senior Member

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    The Repair Manual does say to do a slight counterclockwise rotation (opposite of normal rotation) to release the tensioner.

    upload_2022-2-15_9-36-11.png
     

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    Paul E. Highway and edthefox5 like this.