ssssmokin!

Discussion in 'Engine' started by Carlos2k, May 16, 2019.

  1. Carlos2k

    Carlos2k New Member

    Messages:
    23
    Joined:
    Dec 16, 2018
    Location:
    Derby
    Car:
    W219 CLS
    Hi All,

    My 08 CLS 320 CDI (OM642) seems to have started smoking fairly heavily over the past couple of weeks, its done 123k miles, has full service history and had a refurb turbo fitted in Feb.

    The MOT guy said it would struggle to get through an MOT in its current state.

    It smokes when rev'd from idle and if I hold at 1500 for 5-10 secs and then rev it can deploy a good smoke screen. Mostly the smoke is black.

    The car was fully serviced in feb - oil, filters etc inc fuel filter and glowplugs.

    Any help on what the issue could be would be appreciated.

    So far i've;

    1. Checked the EGR - fully functional, seemed pretty clean. Cleaned the pipe that goes into the inlet.
    2. (TO DO) Fit new cam breather value that plumbs into the intake.
    3.... Advice please?

    Thanks
     
    Last edited: May 16, 2019
  2. flowrider99

    flowrider99 Hardcore MB Enthusiast

    Messages:
    2,145
    Joined:
    Aug 25, 2011
    Location:
    Hertfordshire
    Car:
    SL500 (R230) / Audi S5 Sportback
    Turbo seals? Does your car have a DPF?
     
  3. OP
    OP
    Carlos2k

    Carlos2k New Member

    Messages:
    23
    Joined:
    Dec 16, 2018
    Location:
    Derby
    Car:
    W219 CLS
    Thanks. I'd hope it's not the turbo as it was replaced a couple of k ago, I don't think it has a DPF although I'm not sure.. would an 08 have one?

    I should probably add that ive noticed no change in MPG
     
  4. Teego

    Teego Active Member

    Messages:
    78
    Joined:
    Feb 2, 2018
    Location:
    Derbyshire
    Car:
    CLS55 AMG
    Is it smoke or soot? An Italian tune-up used to work for me. Take it up the bypass and accelerate hard to hit the revs at 4k. After 2 or 3 squirts the soot cleared. Scared the crap out of anyone following me though.
    Always did this immediately pre-MOT.
     
  5. kid-jensen

    kid-jensen Hardcore MB Enthusiast

    Messages:
    1,063
    Joined:
    Dec 16, 2002
    Location:
    Epsom Downs
    Car:
    ML 320 W164
    Black smoke is unburrnt fuel.

    As above, a good Italian tuneup should fix it, maybe some Diesel Cleaning chemicals in the tank for good measure - Wynns, STP or even RedEx, £2 in the Pound shop[?] at the moment.

    If you normally have sooty exhaust end caps (before the problem started) then chances are you don't have a DPF.
     
    Last edited: May 16, 2019

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