Can anyone tell me what this is?

Discussion in 'Engine' started by glynn09, Oct 28, 2008.

  1. glynn09

    glynn09 New Member

    Messages:
    4
    Joined:
    Jun 27, 2007
    And should it be making a clicking noise? Seems to be some sort of pump, that turns on and off. It's only clicking when its on. I've not noticed it before, but I could just be being paranoid, as I'm in the process of selling the car.

    It's a w210 e55, just in case it's engine specific.

    Regards

    Glynn
     

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  2. stevesey

    stevesey Hardcore MB Enthusiast

    Messages:
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    Sep 3, 2007
    Location:
    Bristol
    Car:
    Alfa 156 1.8TS
    Valve for the fuel evapotative loss control system.

    Vents the charcol canister (under front wing) connected to the fuel tank into the inlet manifold. Often "tick", sometimes more than others (mine is disconnected from the mouning block to reduce noise tranmitted into the body).

    Value is closed for first couple of minutes after a start, then pulsed (hence ticking) to vent the fumes from the charcol canister/fuel tank (regulations prevent you releasing fuel vapour to the atmosphere).
     
  3. OP
    OP
    glynn09

    glynn09 New Member

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    Jun 27, 2007
    Thanks for that, greatly appreciated. :)

    Kind regards

    Glynn
     
  4. Smiley

    Smiley Hardcore MB Enthusiast

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    My R129 SL500 ticked quite loudly; first time I heard it I had the fright of my life!
     
  5. recycled

    recycled Hardcore MB Enthusiast

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    i blame the green people. scared me as well when mine was ticking
     

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