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Newbie E300 question about air leaks....

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by hoopyfrood, Sep 11, 2011.

  1. hoopyfrood

    hoopyfrood New Member

    Messages:
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    Joined:
    Sep 7, 2011
    Location:
    Norfolk
    Your Mercedes:
    W210 E300 CDi 1998
    Seems I have an air leak somewhere in the fueling system of my W210 E300d; resulting in no fuel in the system when I come to start and then having to crank the engine over for ages for it to prime up and fire...

    Once running it's fine though.

    Before pulling the whole fueling system apart, is there a usual list of suspect areas I should look at to start with?

    Can't see one, but is there a manual priming system on the engine somewhere? (saves my battery and that of the other car I need to get a jump start from)

    Thanks...
     
  2. television

    television Always remembered RIP

    Messages:
    164,074
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    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    Do look in the pipe from the fuel filter to the engine for air bubbles, it should just need new O rings,50p each from MB
     
  3. Cole@MBS

    Cole@MBS Forum Supporter Authorised Forum Supporter

    Messages:
    13,571
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    652
    Joined:
    Dec 1, 2008
    Location:
    Hedge End, Southampton
    Your Mercedes:
    124 300 CE 24 Coupe, 209 240 CLK
    There's an O ring between the pump and shut of valve, that gets hard and no longer makes a seal and let's air in, and also as Malc above.......
     
  4. SilverSaloon

    SilverSaloon Active Senior Members

    Messages:
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    Joined:
    Apr 15, 2004
    Your Mercedes:
    w124/1994/om606
    start with the clear pipe connection furtherthest back to the tank - fix the bubble there, and see if it fixes the rest.

    replace all the orings as a matter of course.
     

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