m271 engine woes

Discussion in 'Engine' started by dubnut16v, Jun 27, 2014.

  1. dubnut16v

    dubnut16v New Member

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    Hi all.
    I have a 05 c180 which was running fine and then wouldnt start.
    Threw a inlet cam sensor fault and garage
    Replaced. Car still wouldnt start.
    Removed cam cover and cams are way out of timing. One cam is out by about 90 degrees.
    Worn teeth on cam gears and oil in loom.

    Is this beyond repair?
     

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  2. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    You will also need a new chain.

    Its up to you if you think its worth it. Lack of fluid changes and/or crappy oil is usually the cause of the wear.
     
  3. rorf

    rorf Hardcore MB Enthusiast

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    Wow that is the worst I've seen on a 4 pot:crazy:

    Cam out by 90 deg surely the pistons have hit the inlet valves by now.
     
  4. OP
    OP
    dubnut16v

    dubnut16v New Member

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    And it hasnt run. Happened on turn of key.
    Owner repeatedly tried to start.
    Cheapest cam gears ive found is 400+ for the pair 2nd hand!!!
    Engine has done 140000.
    Without internal damage (unlikely) it needs...
    Inlet cam sensor
    Both camshaft adjuster sensors
    Both cam gears
    Chain and guides
    Really cant see it being financially viable

    Oil in loom is quite extensive..has reached ecu...maf..inlet sensor
     
  5. OP
    OP
    dubnut16v

    dubnut16v New Member

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    Serviced regular every 10000
     
  6. martyz

    martyz Hardcore MB Enthusiast

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    Sell it spares or repair.
     
  7. jaymanek

    jaymanek Authorised Forum Sponsor Authorised Forum Sponsor

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    Buy a guaranteed engine from a breaker for around £1500.
     
  8. shorty

    shorty Hardcore MB Enthusiast

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    I had simlar problems with a 200k , the chain had only jumped 3 teeth and I didnt damage any valves .
    I remember contacting Dronsfield and they where qouting me 150 each for the cam gears or 500 for a complete head . I ended up buying two new timing gears for MB , cost me 320 euro each .
     
  9. OP
    OP
    dubnut16v

    dubnut16v New Member

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    Thanks all
    Contacted dronsfields today
    They have a couple low mileage at reasonable cost
    Seems like best idea
     
  10. M271

    M271 Member

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    You can buy re manufactured gears online
     
  11. WG M-B

    WG M-B Auhorised Forum Sponsor Authorised Forum Sponsor

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    How can they re manufacture the gears??
     
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  12. Auto-mobile

    Auto-mobile Hardcore MB Enthusiast

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    Liquid metal?
     
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  13. M271

    M271 Member

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    M271 Timing gear replacement

    The old gear face is removed and a new steel hub attached making it stronger and more durable than the original as they are made from cast iron and wear down very quickly thus you hear the rattling on start-up. Replacing the chain only helps but only very slightly, its the play on the chain and gear teeth that cause this noise. Mercedes wont admit it but they made a mistake by using a single row chain as in the older kompressor motor the M111. I think the reason was because the crank sprocket has a double row but one row drives the oil pump/lanchaster balancer and the other the timing gears. So all the load is on the chain and gears and with the gears being made of cast iron and the chain of steel the weaker metal wears first thus the gears and the inlet (E) more than the other.

    On start up the adjusters are locked in place by pins inside but as the oil pressure builds these pins are released and the adjusters outer surface with the teeth on can move on the central hub and thus the rattle disappears.
    Funny enough the chain replacement isn't even on the Mercedes service schedule so its presumed to be there for life strange but true.

    My advice is if your engine has above 80k miles i would start budgeting for gear and chain replacement, sooner if it has not been maintained properly (regular oil and filter changes)

    Check M271 Parts - Home to buy these gears
     
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  14. zenman63

    zenman63 Hardcore MB Enthusiast

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    I have some Sprockets on the way, there struck in UPS!
    I will get some pictures up when they arrive.
    My chain had stretched a full link!
     
  15. E270 Owner

    E270 Owner Hardcore MB Enthusiast

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    The oil deposits on the cam cap bolts suggest burnt oil or incorrect oil or poor servicing or ............ add whatever else

    Bottom line is replace the engine.
     
  16. M271

    M271 Member

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    Yes replace the engine with new new one as you never know the condition of a used one it might last a few miles then have the same problem better to take the head off check it and repair if needed then fit a new timing chain kit and Camshaft adjusters then you are sure its good for thousands more miles.

    Used engines are like russian roulette most come out of accident damaged cars and are rarely tested and if it starts it doesn't tell you the condition of the timing parts not until its too late. But it carries a warranty which normally turn out to be not worth the paper they are written on and don't cover all the labour/parts involved in taking it in and out.
    So best advice better the one you have than taking on another unless the piston has come through the block or something drastic like that
     
  17. ABTguy

    ABTguy New Member

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    Hi all, I have a R170 SLK 230 Kompressor while my younger has a R171 SLK 200 Kompressor.

    So I am on the M114 Evo and he is on M271 engine. Wondering anyone has any idea whether Mercedes solved this weakest link in their M271 engine in the subsequent years ?

    I meant let say car built after 2008, do they still experience the same timing chain issue ?
     
  18. M271

    M271 Member

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    The R171 used the M271 engine upto 2011, a rule of thumb if it has a kompressor it has the M271 engine from late 2002. On the newer engine with the turbo some bits are the same but different timing gears and chain setup.
     
  19. WG M-B

    WG M-B Auhorised Forum Sponsor Authorised Forum Sponsor

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    I've had a later cgi engine in with a rattling chain as well :eek:
     
  20. M271

    M271 Member

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    Same engine just different injection system
     
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