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Timing Chain Eclass

Discussion in 'Introduce yourself' started by Paul VIP Taxi, Dec 1, 2017.

  1. Paul VIP Taxi

    Paul VIP Taxi New Member

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    Hi everyone, just joined to passing advice about timing chain.

    I've had 7 MB, latest car a 2012 Eclass that I had for the last 3 years from 37k, now at 153K.

    Broke down last night, car just died. Turns out that timing chain snapped and came out through the back of the engine. I've not noticed any odd noise from the engine, no rattles, nothing, car had been running normally.

    MB advise me that the timing chain should last the life of the car. My advice would be to change the timing chain as garage advises I now have £13000 worth of damage. Gutted as this could have been avoided.

    Hopefully, this will help someone make a right decision if there's any concern about whether to renew a timing chain. Cheers for now.
     
  2. star

    star Forum Supporter Authorised Forum Supporter

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    Generally the timing chain will rattle on start up and especially after an oil change, they rarely just snap. It a shame it wasn’t picked up on. Sorry it’s not good news.
    Mercedes gave you the wrong info, the chains on a 651 engine can start to rattle from 75k.
     
  3. John Laidlaw

    John Laidlaw Senior Member

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    Welcome Paul, wish it was better circumstances for you....
     
  4. OP
    Paul VIP Taxi

    Paul VIP Taxi New Member

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    Thanks, live and learn.
     
  5. EmilysDad

    EmilysDad Senior Member

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    I'd be looking at AN Other engine. :oops:
     
  6. ajlsl600

    ajlsl600 Senior Member

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    same as emilysdad . plenty of change left over from good used engine change just make sure you see a guage reading cold, warm, oil press and you ear it running before you part with yr cash. unless yr financially nicking it. and can live with an overhaul cost ,
     
  7. mersum1es

    mersum1es Senior Member

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    Yeah its known that OM651 has 'weakest' timing chain in MB diesels (lets forget OM628 which has ridiculously long chain, wonder how they managed to improve it in OM629) plus PITA to change because location in back of block. Similar 'feeble chain' is found in M271 gasolines. OM642 chains will stretch but rarely snaps.
     
  8. OP
    Paul VIP Taxi

    Paul VIP Taxi New Member

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    No warning. Spoke to MB again today and was advised the same, it should last the car. I'm wondering about multiple start stops in cold weather?
     
  9. AJD

    AJD Senior Member

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    Hi Paul, welcome to the forum. What a blow, I'm very surprised that there were no indicators before this happened. I feel your servicing supplier has failed you there, surely them as experts should have heard a bell ring, so to speak. I'm shocked and surprised :confused:
     
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  10. OP
    Paul VIP Taxi

    Paul VIP Taxi New Member

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    Every service made on schedule and twice changed oil inbeteeen services. But there was no warning and I'd only started the car about 2 or 3 minutes before moving off, reached about 20mph and the car just died. AA thought it was the battery at first. Then we saw this: image shows chunk of metal and oil at side of engine.
     

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  11. Wighty

    Wighty Senior Member

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  12. star

    star Forum Supporter Authorised Forum Supporter

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    I’m still think stop/start/eco technology adds to timing chain wear by the constant snatching on engine start and stoppping.
     
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  13. ajlsl600

    ajlsl600 Senior Member

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    star, sure yr right there. dissable that when resolved ,another load of aggro it sure wont be making timing chain dramas easier......
     
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  14. OP
    Paul VIP Taxi

    Paul VIP Taxi New Member

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    Good point.
     
  15. turbopete

    turbopete Senior Member

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    agreed with this. It does seem to be common on cars with stop start or those used for shorter trips (rather than pounding up and down the motorway etc, regardless of annual mileage)
     
  16. John Laidlaw

    John Laidlaw Senior Member

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    Seeing above I think I’ll stop using Eco mode at all
     
  17. malcolm210

    malcolm210 Senior Member

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    I did soon after the I bought the car, it’s a faff turning it off every journey though wish I could turn it off permanently
     
  18. John Laidlaw

    John Laidlaw Senior Member

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    Agreed! Although to be honest my daily work journey consisted of leaving on Eco through the village then into sport on the M53 then back to Eco at the other end the village where my works are...I’ll just stick it in sport from the beginning now and leave it
     
  19. ajlsl600

    ajlsl600 Senior Member

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    my son in law has this on his motor , i think a blxxdy ballache designed to have you back at benz parts dept, and others. in quarter the time one might normaly expect, engineered premature death . not interested....bet london taxi dont have that enabled for long !!!!!!!
     
  20. Frontstep

    Frontstep Senior Member

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    I would be thinking I needed a beefed up chain/belt in my stop start enabled engine but then I don't design engines for MB and report to their bean counters.
     

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