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W164 Machine gun!!

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by StevieBox, Dec 6, 2018 at 11:49 AM.

  1. StevieBox

    StevieBox Active Member

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    Hi all
    My 2009 ML W164 has developed a very strange noise under hard acceleration from standstill or very low speed, it sound like a machine gun!!
    Normal driving is all ok no vibrations or noises.

    Any ideas please
    Thanks in advance
    Steve
     
  2. John Laidlaw

    John Laidlaw Senior Member

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    From which area Steve?
     
  3. OP
    StevieBox

    StevieBox Active Member

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    Difficult to pin point but sounds front half of the car, gearbox forward, gearbox working fine
     
  4. alexanderfoti

    alexanderfoti MBO Forum Supporter Authorised Forum Supporter

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    Could be loads, front driveshafts/CV's?

    Something stuck on something rotating.

    is it speed dependent or RPM dependent?
     
  5. John Laidlaw

    John Laidlaw Senior Member

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    Little sound clip/video might help....
     
  6. Blobcat

    Blobcat Moderator

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    Playing card in the spokes? :p
     
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  7. John Laidlaw

    John Laidlaw Senior Member

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    Lollipop stick in my day :p
     
  8. PaulG

    PaulG Senior Member

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    If "someone" has had rthgew front suspension apart letely, it's very easy to pull the splined driveshaft out of the CVJ.

    It will usually push back in, but not all of the balls will be in place.

    Guess how I know?

    Do you get vibration as well? that might be the cause.
     
  9. OP
    StevieBox

    StevieBox Active Member

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    I have checked for cards in the spokes :)

    It is literally when you boot it from stand still or very low speed, once it's up to 10-15mph it stops, nothing has been apart drives perfectly at all other times
    I'll try and record the sound
     
  10. Uncle Benz

    Uncle Benz Senior Member

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    Chain jumping in the transfer box. Done a load recently. The chain will have stretched. It's a big old morse type thing. Catch it early or it'll break the metal pedestal that the chain tensioner bolts to.
     
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  11. Craiglxviii

    Craiglxviii Senior Member

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    The muzzle ;)
     
  12. John Laidlaw

    John Laidlaw Senior Member

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    Boom boom....:)
     
  13. OP
    StevieBox

    StevieBox Active Member

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    New
    What does that involve to fix it uncle benz?
     
  14. Taffy7hfa

    Taffy7hfa Senior Member

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  15. Uncle Benz

    Uncle Benz Senior Member

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    I've replaced the chain in quite a few of them. You'll find the chain on eBay. I had one where the casing had broken. I put a secondhand unit in that one. I have the broken one here and will be investigating a repair to the broken bit soon.
    Don't keep hammering it or you will bust your casing. Get it opened up sooner rather than later.

    Transfer box

    [​IMG]

    Chain

    [​IMG]

    [​IMG]
     
  16. Uncle Benz

    Uncle Benz Senior Member

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    Video above is a w163. Job is similar, but not exactly the same.
     
  17. OP
    StevieBox

    StevieBox Active Member

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    Thanks guys. All very helpfull.
    Well most of you!!
    I spent ages looking for cardboard in the spokes
     
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  18. Taffy7hfa

    Taffy7hfa Senior Member

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    No worries, don't forget to check that your balls are in place :)
     

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