What's this?

Discussion in 'Engine' started by ItalianTuneUp, Apr 12, 2014.

  1. ItalianTuneUp

    ItalianTuneUp Hardcore MB Enthusiast

    Messages:
    1,357
    Joined:
    Nov 20, 2013
    Location:
    Hampshire
    Car:
    S320CDI
    Does anyone know what this is...the long rectangular thing to the immediate left of the engine/oil cap? See pic.



    ForumRunner_20140412_090737.jpg
     
  2. M11GUL

    M11GUL Hardcore MB Enthusiast

    Messages:
    129
    Joined:
    Sep 23, 2006
    Location:
    Rugby
    Car:
    W211 E320 Sport
    The air filter box
     
    1 person likes this.
  3. OP
    OP
    ItalianTuneUp

    ItalianTuneUp Hardcore MB Enthusiast

    Messages:
    1,357
    Joined:
    Nov 20, 2013
    Location:
    Hampshire
    Car:
    S320CDI
    Thanks very much. I was vacuuming out all the leaves and debris out of the engine bay yesterday and noticed that one of the three spring clips was missing from this air filter box.

    Foolishly I decided to open the lid by removing the remaining 2 clips, and the clip went ping and disappeared forever to the bottom of the engine bay...probably resting now on the engine bay cover. I can't see it anywhere! :doh:

    1. Is the loss of 2 out of 3 clips likely to cause a problem?
    2. Can I purchase new clips anywhere without having to buy a whole new air filter box?
     
    Last edited: Apr 12, 2014
  4. buster651

    buster651 Member

    Messages:
    31
    Joined:
    Feb 21, 2012
    Location:
    Gloucestershire
    Car:
    1992 r129 500sl
    drop sump/engine guard and you'll prob have 2
     
    1 person likes this.
  5. evdok

    evdok Hardcore MB Enthusiast

    Messages:
    2,519
    Joined:
    Sep 26, 2006
    Location:
    Stourport
    Car:
    BMW 330D xDRIVE M/SPORT INDIVIDUAL
  6. OP
    OP
    ItalianTuneUp

    ItalianTuneUp Hardcore MB Enthusiast

    Messages:
    1,357
    Joined:
    Nov 20, 2013
    Location:
    Hampshire
    Car:
    S320CDI
  7. OP
    OP
    ItalianTuneUp

    ItalianTuneUp Hardcore MB Enthusiast

    Messages:
    1,357
    Joined:
    Nov 20, 2013
    Location:
    Hampshire
    Car:
    S320CDI
    Also I noticed that the rubber plastic air duct that feeds air from the front of the engine bay to the air filter box had become loose and was no longer attached, so it wasn't supplying air to the box. What is the likely effect of that? Reduced fuel economy, drop in performance? Other effects?
     
  8. evdok

    evdok Hardcore MB Enthusiast

    Messages:
    2,519
    Joined:
    Sep 26, 2006
    Location:
    Stourport
    Car:
    BMW 330D xDRIVE M/SPORT INDIVIDUAL
    It will do a bit of difference, prob not enough for you to notice so long as its not sucking warm air in.
     
  9. grober

    grober MB Club Veteran

    Messages:
    24,149
    Joined:
    Jun 22, 2003
    Location:
    Perth, Scotland
    Car:
    W204 C200CDI Estate
    Probably nothing much but theoretically by feeding hotter ,less dense air from the engine compartment rather than cooler denser air from the front intake might prevent the engine running better/ slightly more economically. Governed by the difference in the 2 temperatures i.e. more likely to be of benefit after a long journey in hot conditions. Technically since the MAF unit works on the thermal principle ----the sensor is one leg of a heated wheatstone bridge circuit and measures the density of air passing by how much its cooled by the passage of the engine air charge it should compensate anyway.
     
  10. Druk

    Druk Administrator Staff Member

    Messages:
    5,309
    Joined:
    May 28, 2004
    Location:
    Not far from Edinburgh.
    Car:
    2011 S212 E350CDi. 1981 R107 300TurboDiesel.
    " I expect MB want gazillions of pounds for some of them "



    Air filter housing spring. A000 993 17 25.

    0.43p each approx. Look closely...there are seven in total.

    :D
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.