Crank Sensor Replacement (A140 W168)

Discussion in 'Engine' started by TazzyK, Sep 26, 2015.

  1. TazzyK

    TazzyK New Member

    Messages:
    15
    Joined:
    Sep 25, 2013
    Car:
    A140 Avantgarde
    I need to replace the crank sensor on our old Mercedes A140 (W168).

    I managed to get the old sensor out (just about) but destroyed it in the process as it was a VERY, VERY tight fit. Now I can't get the new one in as again, it's a VERY, VERY tight fit.

    I don't know much about these sensors as such, so I guess I'm asking if I can safely use any sort of lubrication to aid fitting? There's not much space (even though the sensor is on the front face near the gearbox, access is awkward). If anyone has done this on this particular model (or any other as the same sensor fits other models too) can you please advice on how to go about refitting
     
  2. Auto-mobile

    Auto-mobile Hardcore MB Enthusiast

    Messages:
    1,600
    Joined:
    Oct 1, 2011
    Location:
    Birmingham
    Car:
    2x c43 Amg clio 172 turbo 314bhp
    Run some sandpaper around where the sensor sits then smear a small amount of grease around the sensor, not on the end though.
     
  3. OP
    OP
    TazzyK

    TazzyK New Member

    Messages:
    15
    Joined:
    Sep 25, 2013
    Car:
    A140 Avantgarde
    Thanks for the reply. Sorted now but my hands are aching and finger tips are well and truly cut!!

    I cleaned out the hole it sits it with some brake cleaner and 1000 wet n dry paper. Also, the sensor itself had a slight lip (where the two plastic halves joined together???) and I flatted these out with the sandpaper. It wasn't much, but it was possible to force most of the sensor in to be able to get the torx screw on. Then I drove the rest of the sensor home by tightening the screw. If it fails again I feel sorry for the next person having to take it out (in another 150k miles lol)
     
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