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Discuss '99 E240 V6 Water Pump Change Query in the alt.auto.mercedes forum at Car Dealer Forums; My water pump has failed and I'm considering replacing it myself but I'm unsure whether ...
  1. #1
    Mitch
    Guest

    Default '99 E240 V6 Water Pump Change Query

    My water pump has failed and I'm considering replacing it myself but I'm
    unsure whether it needs a special coolant bleeding process afterwards to
    make sure there are no airlocks. I heard for some cars (Ford Sierras) this
    is essential to avoid overheating hassles but is this necc for a MB? The
    'special process' I believe amounts to briefly undoing various bleed valves
    round the engine and heater to clear air pockets.

    Thanks

    Si






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  2. #2
    Roland Franzius
    Guest

    Default Re: '99 E240 V6 Water Pump Change Query

    Am 08.12.2012 23:48, schrieb Mitch:
    > My water pump has failed and I'm considering replacing it myself but I'm
    > unsure whether it needs a special coolant bleeding process afterwards to
    > make sure there are no airlocks. I heard for some cars (Ford Sierras) this
    > is essential to avoid overheating hassles but is this necc for a MB? The
    > 'special process' I believe amounts to briefly undoing various bleed valves
    > round the engine and heater to clear air pockets.


    There is no problem with MB engines. They all have a coolant expansion
    system now. The last engine with such a problem may have beenin
    W114/115's in the seventies.

    --

    Roland Franzius

  3. #3
    Mitch
    Guest

    Default Re: '99 E240 V6 Water Pump Change Query

    Thanks Roland,

    Just out of interest why do MB cars use Torx hexagonal heads (eg water pump
    bolts) and also Torx screw heads (eg MAF sensor) instead of hex heads and
    standard allen screws?

    M



  4. #4
    trader4@optonline.net
    Guest

    Default Re: '99 E240 V6 Water Pump Change Query

    On Jan 6, 10:35*am, "Mitch" <m...@mitchelmores.plus.com> wrote:
    > Thanks Roland,
    >
    > Just out of interest why do MB cars use Torx hexagonal heads (eg water pump
    > bolts) and also Torx screw heads (eg MAF sensor) instead of hex heads and
    > standard allen screws?
    >
    > M


    Why to make it more interesting to work on.
    Just about everyone has a set of sockets. Not
    everyone has a set of Torx. Could be worse.
    BMW X5 uses a 27mm socket for the oil filter.
    Go figure. Like who has that large of a one?

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