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SL 1991 m119 engine

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by stoneage, May 14, 2019.

  1. stoneage

    stoneage Active Member

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    Joined:
    Apr 18, 2010
    Location:
    east midlands leicester
    Your Mercedes:
    alfa, and merc 500sl
    Good eveing all, can some help with this problem? my 91/sl 500 has started get oil in the plug wells, ive change the rocker cover gaskets and the rubber gommet that sit in the rocker covers,but stiil the problem excits ,no oil in water not smoking no water lost ,on start up it miss for a few second then rums ok ,but when in traffic on tic over it mis fire, ive change all ignistion conponent? is this piston rings or head gasket, mileage is 150.000 thanks
     
  2. LostKiwi

    LostKiwi Senior Member

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    Location:
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    Your Mercedes:
    '93 500SL-32, '01 W210 Estate E240, 02 R230 SL500 (Malcolm Spec), 04 Smart Roadster Coupe
    Check you don't have a blocked engine breather.
     
  3. OP
    stoneage

    stoneage Active Member

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    Joined:
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    Location:
    east midlands leicester
    Your Mercedes:
    alfa, and merc 500sl
    Thanks for you infor, clean all breathers, runs and starts better still has a miss fire on tick over, will now check all electrical ignistion parts , LostKiwi thanks
     
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  4. Richard Moakes

    Richard Moakes Senior Member

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    Joined:
    May 19, 2002
    Location:
    Newton Abbot, Devon, UK
    Your Mercedes:
    1991 R129.066 M119.960; 2005 W164.175 M113
    Increase spark plug gap to 1mm, it will smooth out the idle.


    Sent from my iPhone using Tapatalk
     
  5. OP
    stoneage

    stoneage Active Member

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    Your Mercedes:
    alfa, and merc 500sl
    your suggestion,plug gas 0.8 factoty set will increase to 0.9 Richard ill post results,:)
     
  6. Richard Moakes

    Richard Moakes Senior Member

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    Joined:
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    Location:
    Newton Abbot, Devon, UK
    Your Mercedes:
    1991 R129.066 M119.960; 2005 W164.175 M113
    I would be interested, just finished an injector and associated pipework overhaul, and as part of the service I fitted new plugs gapped to 1mm, and it’s probably just my perception, but I think it’s idling much smoother than it ever has.
     
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  7. OP
    stoneage

    stoneage Active Member

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    Your Mercedes:
    alfa, and merc 500sl
     
  8. OP
    stoneage

    stoneage Active Member

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    Joined:
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    Location:
    east midlands leicester
    Your Mercedes:
    alfa, and merc 500sl
    Richard Moakes, set plugs at 1mm, as you suggested and my old 91/500 does tick over better than it ever did, again thanks you and all other member who offered suggestions ,stoneage
     
  9. LostKiwi

    LostKiwi Senior Member

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    Joined:
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    Location:
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    Your Mercedes:
    '93 500SL-32, '01 W210 Estate E240, 02 R230 SL500 (Malcolm Spec), 04 Smart Roadster Coupe
    Great tip Richard!
     

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