1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

OM651 diesel engine

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by Uncle Benz, Jan 20, 2014.

  1. Uncle Benz

    Uncle Benz Senior Member

    Messages:
    2,575
    Likes Received:
    845
    Joined:
    Mar 31, 2006
    Location:
    West Sussex
    Your Mercedes:
    Mainly Mercedes
    Seems Mercedes have not resolved their recent M271 timing chain issues with the new oM651 engine.

    [​IMG]

    This is with the tensioner still in. Note the pile of chain on the right side of the picture.
     
    Last edited: Jan 20, 2014
  2. Cole@MBS

    Cole@MBS Forum Supporter Authorised Forum Supporter

    Messages:
    13,492
    Likes Received:
    500
    Joined:
    Dec 1, 2008
    Location:
    Hedge End, Southampton
    Your Mercedes:
    124 300 CE 24 Coupe, 209 240 CLK
    They never learn G, have heard MB have been throwing chains at that engine for a while........
     
    matthew k likes this.
  3. Frontstep

    Frontstep Senior Member

    Messages:
    6,954
    Likes Received:
    851
    Joined:
    Apr 22, 2007
    Your Mercedes:
    T210 320cdi
    Thats within manufacturers tolerance sir !
    Or "we have never had that before"
     
    matthew k likes this.
  4. turbopete

    turbopete Senior Member

    Messages:
    14,204
    Likes Received:
    317
    Joined:
    Feb 4, 2009
    Location:
    Spennymoor
    Your Mercedes:
    2010 '60' Ford Mondeo 2.0TDCi Zetec (sorry)
    how many miles has that engine done, for that to happen?
     
  5. OP
    Uncle Benz

    Uncle Benz Senior Member

    Messages:
    2,575
    Likes Received:
    845
    Joined:
    Mar 31, 2006
    Location:
    West Sussex
    Your Mercedes:
    Mainly Mercedes
    120k, but apparently they can go bad much earlier.
     
  6. star

    star Forum Supporter Authorised Forum Supporter

    Messages:
    5,220
    Likes Received:
    666
    Joined:
    Oct 6, 2004
    Location:
    Reading
    Your Mercedes:
    Smart + others :)
    Yes we have seen several at 70-90k that rattle so bad after draining the oil and a filter change, I was praying it wasn't going to jump a tooth or so. :(

    I'm still waiting for the tool from Mercedes hat determines what parts require replacing depending on the streatch.

    Few broken teeth there too, they going to be a pain to fetch out of the sump.
     
    Last edited: Jan 20, 2014
  7. ernieh

    ernieh Senior Member

    Messages:
    1,435
    Likes Received:
    65
    Joined:
    Nov 20, 2006
    Location:
    Scotland, East
    Your Mercedes:
    205 / 67 / C220 d
    Is this an engine-out job or does it depend on the damage? Looks like our next C could be a petrol...but then that's a 271, isn't it?

    Ernie
     
  8. grober

    grober Senior Member

    Messages:
    2,938
    Likes Received:
    21
    Joined:
    May 15, 2002
    Location:
    Scotland
    Your Mercedes:
    W204 C200cdi estate
    Problem with the OM651 is the timing gear is at the rear of the engine, so if extensive work is required its an engine out job I think. The OM651 in various states of tune is almost ubiquitous across the Mercedes range from the A class to the CLS/ ML. Lets hope there's an insitu fix or modification [ duplex chain??] in the pipe line.

    ps if its any consolation BMW had similar problems on their recent 4 cylinder diesels fitted from Mini to 5 series --- its all to do with shorter/shallower engine blocks to afford more air space under the bonnet for pedestrian collision safety I am led to believe.
     
    Last edited: Jan 21, 2014
  9. turbopete

    turbopete Senior Member

    Messages:
    14,204
    Likes Received:
    317
    Joined:
    Feb 4, 2009
    Location:
    Spennymoor
    Your Mercedes:
    2010 '60' Ford Mondeo 2.0TDCi Zetec (sorry)
    educate pedestrians to LOOK for cars before crossing roads etc and that the PAVEMENT is for pedestrians, the roads are for CARS

    after all, i dont see many 'pedestrian friendly' shaped buses, HGV's etc
     
  10. Stability

    Stability Senior Member

    Messages:
    159
    Likes Received:
    11
    Joined:
    Jan 11, 2014
    Location:
    UK
    Your Mercedes:
    Mercedes
    MB changed the chain they used on the 271 because it used to stretch.

    Now they have the chain problem sorted - they obviously did bugger all about the sprocket quality.

    With all the crap they had with the 272 engines you think they would have sorted this crap out.

    But……….. it keeps us indies busy
     
  11. star

    star Forum Supporter Authorised Forum Supporter

    Messages:
    5,220
    Likes Received:
    666
    Joined:
    Oct 6, 2004
    Location:
    Reading
    Your Mercedes:
    Smart + others :)
    You'd think they would have learnt from the 102 engine........... wait the DID and then fitted a duplex chain to later 102 engines. Perhaps the young deigners/engineers of today can't remember that far back.
     
    matthew k likes this.
  12. Stability

    Stability Senior Member

    Messages:
    159
    Likes Received:
    11
    Joined:
    Jan 11, 2014
    Location:
    UK
    Your Mercedes:
    Mercedes
    dawn right - recently done a 113 heads and had to stand back with a fag admiring the chain for 5.
     
  13. star

    star Forum Supporter Authorised Forum Supporter

    Messages:
    5,220
    Likes Received:
    666
    Joined:
    Oct 6, 2004
    Location:
    Reading
    Your Mercedes:
    Smart + others :)
    Not looking good for the 651 engine, we had 2 cars delivered by recovery truck last week, both new to us and both 10 plates, one had a loose timing chain tensioner and lost its oil and threw a rod (only ever been serviced at merc). The other which also had been serviced at mb and to be fair they did report a noisy chain has now got a snapped chain.
     
    Last edited: Feb 4, 2014
  14. stumo

    stumo Senior Member

    Messages:
    384
    Likes Received:
    15
    Joined:
    Sep 4, 2008
    Location:
    VIC, Australia
    Your Mercedes:
    ML270CDI 2002 facelift| Sprinter 316CDI 2003 LWB
    What mileage did they have on them?
     
  15. star

    star Forum Supporter Authorised Forum Supporter

    Messages:
    5,220
    Likes Received:
    666
    Joined:
    Oct 6, 2004
    Location:
    Reading
    Your Mercedes:
    Smart + others :)
    The one with the loose tensioner and thrown a rod has 70,000m and the other 110,000m. Both main dealer serviced and maintained, not seen either car before.

    I expect we will start to see alot more of them with similar problems, we have ordered all the special tools for the job.
     
    matthew k likes this.
  16. star

    star Forum Supporter Authorised Forum Supporter

    Messages:
    5,220
    Likes Received:
    666
    Joined:
    Oct 6, 2004
    Location:
    Reading
    Your Mercedes:
    Smart + others :)
    Edit that, 50,000 and 78,000. :(
     
    matthew k likes this.
  17. television

    television Always remembered RIP

    Messages:
    164,074
    Likes Received:
    277
    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    Do not these lengthy jobs upset the normal running of a workshop, 2 or 3 of them at the same time must upset the normal flow of work.
     
  18. star

    star Forum Supporter Authorised Forum Supporter

    Messages:
    5,220
    Likes Received:
    666
    Joined:
    Oct 6, 2004
    Location:
    Reading
    Your Mercedes:
    Smart + others :)
    Yes it can but we tend to set aside one man to do these type of jobs. We sent the 50k mile car to mb as it was only just out of warranty and had only been worked on by them, £320 +vat later, no goodwill. :( so it's going to be back with us.
     
    matthew k likes this.
  19. Corned

    Corned Senior Member

    Messages:
    1,470
    Likes Received:
    5
    Joined:
    Jun 25, 2012
    Location:
    East Midlands
    Your Mercedes:
    2005 S211 E320CDI Avantgarde
    I'm amazed MB have any customers left.

    But it's great news for the indies - you're going to be very busy for years to come with these continuing problems MB repeatedly wash their hands of.

    I was thinking of a new career anyway - I think I now know what to go and do!
     
    matthew k likes this.
  20. star

    star Forum Supporter Authorised Forum Supporter

    Messages:
    5,220
    Likes Received:
    666
    Joined:
    Oct 6, 2004
    Location:
    Reading
    Your Mercedes:
    Smart + others :)
    We would rather not being carrying out these sort of repairs, its too time consuming and I'm sure some customers think it down to us for the design and poor materials used. :(

    I feel for the customer who has the short end of the deal.
     
    matthew k likes this.

Share This Page