Timing Chain Rattle

Discussion in 'Engine' started by RightTool, Jan 16, 2017.

  1. RightTool

    RightTool New Member

    Messages:
    4
    Joined:
    Jan 16, 2017
    Car:
    C180, 2 Litre Petrol, 2001
    Hi guys

    I'm hoping someone here can help me.

    I'm getting a rattling noise from the engine (C180, 2Litre Petrol, 2001. 111 series engine). The noise is akin to marbles in a can.

    It only occurs at idle however.

    I've recorded a 30 second video and put it on youtube.

    https://www.youtube.com/watch?v=advQJBURBkg

    Can anyone confirm if this noise is from a worn timing chain? Or maybe the tensioner?
    Would it make sense for this noise to only occur at idle?

    Thanks for any help!
     
  2. pembssurf

    pembssurf Hardcore MB Enthusiast

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    677
    Joined:
    Oct 23, 2014
    Car:
    toyota
    Sounds like timing chain rattle to me. Get the rocker cover off ASAP and check it. Does not sound healthy!
     
    1 person likes this.
  3. OP
    OP
    RightTool

    RightTool New Member

    Messages:
    4
    Joined:
    Jan 16, 2017
    Car:
    C180, 2 Litre Petrol, 2001
    Thanks for the reply pembssurf.

    I'll take the cover off this weekend and have a look. Being completely honest I haven't got much experience with timing chains but I'm interested in addressing this as a project!

    If I take the cover off I'll see the two cam sprockets and the chain across the top. Is that enough to tell if the chain is slack?

    It's the M111.951 engine. I know the later M271 was more prone to wearing out timing chains.
     
  4. OP
    OP
    RightTool

    RightTool New Member

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    Joined:
    Jan 16, 2017
    Car:
    C180, 2 Litre Petrol, 2001
    Can anyone offer any further advice on this? I'm pretty certain the chain is slack. Does that indicate a worn chain or a worn/faulty timing chain tensioner? Would it be worth getting a new tensioner and fitting that first to see if that fixes the problem?
     
  5. alecmascot

    alecmascot Hardcore MB Enthusiast

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    Location:
    North East UK
    Car:
    C220 CDI 57 plate
    It could be the timing chain, but it also sounds like a failed alternator clutch. I am just not sure if one was fitted to your car.
    Does the alternator pulley have a flat plastic cap fitted or can you see the retaining nut ?
     
    RightTool likes this.
  6. Dizz

    Dizz Hardcore MB Enthusiast

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    Car:
    CLK320 (w209)
    Could also be the water pump failing
    (When did you first post this???)
     
    RightTool likes this.
  7. Petrol Pete

    Petrol Pete Hardcore MB Enthusiast

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    Location:
    Petrol stations ...everywhere
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    C55 AMG Wagon
    Looks like January 2017....19 months ago. it's either blown up or fixed by now I should think. :dk:
     
  8. Dizz

    Dizz Hardcore MB Enthusiast

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    Car:
    CLK320 (w209)
    Yep, but he has posted the same problem yesterday so has the rattling returned or was it just pushed back into a garage and forgotten for 19months.


    Sent from my iPad using Tapatalk
     
  9. Petrol Pete

    Petrol Pete Hardcore MB Enthusiast

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    No idea, but I hope we find out soon, can't bear to wait another 19 months , the suspense will kill me :p !
     
    RightTool, bme63 and Dizz like this.
  10. OP
    OP
    RightTool

    RightTool New Member

    Messages:
    4
    Joined:
    Jan 16, 2017
    Car:
    C180, 2 Litre Petrol, 2001
    Sorry about the delays guys!

    The car is used once or twice a week, it’s not my daily driver.

    I don’t think it’s an alternator or water pump issue, because I’ve never had problems with a flat battery or overheating.

    I’m just unsure as to whether or not it’d be worth buying and fitting a new timing chain tensioner and seeing if that stops the noise? (Right now I’m thinking the current tensioner is no longer operating correctly and the sufficient tension isn’t being kept on the chain) do those chain tensioners fail? Or is it more likely to be the chain has stretched to the extent that even a perfect tensioner can no longer take up the slack? The car was born in 2001... so the chain & tensioner are a few years old at this stage
     
    Last edited: Jul 28, 2018
  11. Mr Filipov

    Mr Filipov Hardcore MB Enthusiast

    Messages:
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    Dec 30, 2015
    Car:
    2017 BMW 535d Gran Turismo
    Did you ever get anyone to take the cover off to check the chain? If you haven’t even done that then I don’t know what you’re waiting for.
    For what it’s worth and if you want to keep the car change both chain and tensioner as a preventative measure. Otherwise wait till it goes pop and write off the car.
     

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