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Diagnosing faulty injector w/s203

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by Clockwork, Mar 13, 2018.

  1. Clockwork

    Clockwork Active Member

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    Hi all,

    On the V6 320 auto is it correct that all 6 injectors need to be taken off and tested to determine faults?

    It currently drives perfectly but a bit smokey on cold starts and everything else has been ruled out so want to address it asap.

    Cost to send off 6 to be tested is almost the same as 6 new ones

    Cheers
     
  2. bob 6600

    bob 6600 Senior Member

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    Your Mercedes:
    Audi S8 V10, S210 E320 CDI (R.I.P.)
    STAR and possibly some other diagnostic equipment can check injected quantities and if they are in tolerance
     
  3. Pathfinder

    Pathfinder Senior Member

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    Your Mercedes:
    CLC 220 CDi Sport Diesel Year 2008
    Is white or black smoke and what is the milage?
     
  4. OP
    Clockwork

    Clockwork Active Member

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    155k, white/blue but has had alot of work done on it recently. Oil cooler kit changed, new turbo, gaskets changed, oils all changed, terraclean equivalent.

    I don't think injectors have been changed ever. I did think about having them all changed due to mileage to prolong it's life anyway
     
  5. Pathfinder

    Pathfinder Senior Member

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    Your Mercedes:
    CLC 220 CDi Sport Diesel Year 2008
    May I ask the reason for the turbo change, was the bearing shot?
     
  6. OP
    Clockwork

    Clockwork Active Member

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    Smoking was the initial reason for check but yes inspection showed the bearing was on its way out. This is all according to the mechanic but he is an mb specialist with rave reviews
     
  7. Westheath

    Westheath Senior Member

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    Your Mercedes:
    Empty garage, awaiting new toy :)
    Diesel Bob has a very reasonably priced test service.

    Injector testing:
    Conventional style injectors (not common rail) £8:00ea
    Common rail injector testing £22:00ea
    PD/Unit injector testing (e.g. 1.9 TDI VW) £30:00ea

    A no nonsense geezer as well :)

    http://www.dieselbob.co.uk/injectors.aspx
     
  8. Pathfinder

    Pathfinder Senior Member

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    If the turbo bearing was on the way out, it is possible that the piston rings or valve seals are also on the way out, as it was the same engine oil that had been lubricating both surfaces. Could try a compression test on each cylinder.
     
  9. OP
    Clockwork

    Clockwork Active Member

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    Thanks guys

    Diesel Bob sounds good shame he is so far away! I'm in Bournemouth
     
  10. alexanderfoti

    alexanderfoti MBO Forum Supporter Authorised Forum Supporter

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    W221 S65 AMG - W204 C63 AMG + Various other MB's
    Post them! He has a set of my kubota injectors at the moment.
     
  11. Pathfinder

    Pathfinder Senior Member

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    Your Mercedes:
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    Blue ish smoke issually indicates burning oil. Don't rule out the piston rings and valve seals just yet. Get a compression test done before throwing money at injectors.
     

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