Noise in prius engine

Discussion in 'Gen 3 Prius Technical Discussion' started by Wahid D, Nov 15, 2017.

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  1. bisco

    bisco cookie crumbler

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    :(
     
    #21 bisco, Nov 20, 2017
  2. Wahid D

    Wahid D Junior Member

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    Sir You are right, I,ll check the belt morrow, the noise not end after getting warmer, and one more thing i note today that is On POWER Mode Or ECO Mode when i suddenly accelerate the sound comes like when we try to drive manual transmission vehicle at 40 speed in 4th or 5th gear, the second thing is my prius gear is smooth when i drive, back or use parking didn't feel any noise aur disturbance, and when i drive just on battery then noise ends.
     
    #22 Wahid D, Nov 21, 2017
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  3. Wahid D

    Wahid D Junior Member

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    Thank You :)
     
    #23 Wahid D, Nov 21, 2017
  4. Wahid D

    Wahid D Junior Member

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    Im Using ZIC 10/40 5 thousand mileage 4 liter
     
    #24 Wahid D, Nov 21, 2017
  5. Wahid D

    Wahid D Junior Member

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    Sir what kind of Info you need? tell me i,ll provide
     
    #25 Wahid D, Nov 21, 2017
  6. Wahid D

    Wahid D Junior Member

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    What I,ve to do then?
     
    #26 Wahid D, Nov 21, 2017
  7. Wahid D

    Wahid D Junior Member

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    :cry:
     
    #27 Wahid D, Nov 21, 2017
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  8. Jayw13702

    Jayw13702 Active Member

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    You need to have the engine tested for head gasket leak.
    Here in the uk we have a “sniffer” test, it tests for oil in the water and water in the oil. That would be my first place to start


    2010 Gen 3
     
    #28 Jayw13702, Nov 21, 2017
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  9. bisco

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    is 10/40 the recommended oil? seems thick, but i suppose a warm climate.
     
    #29 bisco, Nov 21, 2017
  10. Dxta

    Dxta Senior Member

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    Can you just place the recorder close to the engine immediately you start the car?

    After you've done that, try revving the engine some bit, to see if that noise is proportional to it.
     
    #30 Dxta, Nov 21, 2017
  11. Tbkilb01

    Tbkilb01 Active Member

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    I hear it in the background.
    It's a knocking thump sound.
    At cold start mine does it too.
    sounds close to CVT but hard to tell. Hasn't increased nor decreased last 10k miles.
     
    #31 Tbkilb01, Jan 5, 2018
  12. Arjen

    Arjen Junior Member

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    Hi Wahid D,

    Same noise experienced. It has something to do with bad fuel mixture or misfires at some times. Possibly caused by an old type Intake manifold. There has been a TSB for it, see:
    NEW!!! Service Bulletin for Engine Knocking at Startup T-SB 0012-10 | PriusChat
    Can you tell me the partnumber which is stamped on the Intake manifold?

    Can also be slightly/more worn sparkplugs, causing random misfires, when was the last change milage? or EGR or TB dirty.

    Greetings Arjen.
     
    #32 Arjen, Jan 8, 2018
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  13. milkman44

    milkman44 Active Member

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    I think you're in the right ballpark, I had the same random sound and was experiencing misfire. Sure sounds the same and I think it comes from the clutch plate that they use for a damper between the engine and electric motor. I fixed the misfire and never heard it again. The noise in the video is NOT a connecting rod as his "mechanic" suggested.
     
    #33 milkman44, Jan 8, 2018
    Last edited: Jan 8, 2018
  14. Danny3xd

    Danny3xd Active Member

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    "TB", Arjen?
     
    #34 Danny3xd, Jan 8, 2018
  15. Mendel Leisk

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    You can remove and clean the intake manifold, that would also determine if it's indeed IM clogging that's the issue. I'm not sure that the revised intake manifold solved anything, it's expensive, wasteful of resources, especially when simple cleaning is a good first step. Watch @NutzAboutBolts video for intake manifold cleaning, it is one video in the set, here:

    intake manifold cleaning

    One comment on the above: it is possible to remove the throttle body without disconnecting coolant hoses.
     
    #35 Mendel Leisk, Jan 8, 2018
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