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270 CDI Head off, really stuck injector. Suggestions please!

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by Sponcom, Nov 22, 2012.

  1. Sponcom

    Sponcom Senior Member

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    Hi All

    I have a stuck injector, see picture!

    injector stuck.JPG

    The head of the injector had to be cut off in order to remove the cam cover and get to the head bolts.

    It would not come out with an injector removal tool - wouldn't budge at all.

    I have soaked it in carb cleaner for days and have had a 24" spanner on it and can't loosen it or rotate.

    Does anyone have any suggestions before I attempt a last resort of drilling it out? I'm a little worried about doing this and damaging the head.

    Many thanks
     
    Last edited: Nov 22, 2012
  2. WG M-B

    WG M-B Senior Member Authorised Forum Supporter

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    I had one once. Sent it to engineering company to be removed, and told me the head was scrap!!!!!
    This was a 611 lump
     
  3. Corned

    Corned Senior Member

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    If the head is off, can't you attempt to drift/knock it out from the combustion chamber end?

    Edit, or is it still screwed down in its thread?
     
    Last edited: Nov 22, 2012
  4. Corned

    Corned Senior Member

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    Or a Stilson wrench?
     
  5. OP
    Sponcom

    Sponcom Senior Member

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    Thanks for the reply. I've tried drifting it out but the injection end is very small and difficult to get a drift to stay. Maybe if I drill it a little I can get better purchase.
     
  6. mersum1es

    mersum1es Senior Member

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    This won't be a big help, but I once read from finnish mb forum that they have used some kind of inductive/electric heater (or welding machine type?) to heat up the injector body, and then managed to pull it away. Of course problem is that if injector body is hotter than cylinder head, are the tolerances 'wrong way', but clearance should be so large that it doesn't matter. Instead the tar in between the hole and body will be more fluid and shouldn't be so adhesive.
    Good luck.
     
  7. Ian Parkin

    Ian Parkin Senior Member

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    warm the head up with a gas blowtorch and then stilsons

    if you bring it to me i can mill it out...but prob to far for you ...sheffield..
     
    Last edited: Nov 22, 2012
  8. OP
    Sponcom

    Sponcom Senior Member

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    Thanks for the tips.

    Sheffield is a little out of my way but thanks for the offer!

    I'll try some stilsons and heating it this evening first.
     
  9. kebo57

    kebo57 Senior Member

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    Hi get some heat in to the injector red hot
    Turn head over and grip injector in a bench
    vice a good one with good jaws, turn the head
    by hand don't snap it of at this stage let it cool
    down try again in the vice rotate clock & anticlockwise
    Take it out of vice give the injector a whack with a
    hammer as to knock it further in this could compress
    the copper washer seal in the bottom of the hole
    Your trying to move it but only minutely slowly slowly
    catch a monkey, put it back in vice try rotating the head
    with you hands, if it shears off it doesn't matter at
    this stage as it will need to be machined out the head
    will not be scrap, some one local could easily drill/bore/mill
    it out.
    I can machine it out I'm 165 miles from you
    Get back to us ASAP

    Kev

    Edit the picture look like you have turned it slightly
    if so turn it the other way
     
    Last edited: Nov 22, 2012
  10. OP
    Sponcom

    Sponcom Senior Member

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    Vice is a great idea and I just realised I've lost my Stilsons!

    I'll give it a go and report back. If it doesn't work then it's off to the machine shop!

    Thanks
     
  11. WG M-B

    WG M-B Senior Member Authorised Forum Supporter

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    Do not warm the cylinder head up with a blow torch pleeeeeeeeease!!!!!!!!!
    Applying heat directly to the injector will help although it goes against the laws of physics :confused:
    Heat the injector while trying to turn it and you may have joy. Although I don't think so :(
    But good luck!!!!
     
  12. OP
    Sponcom

    Sponcom Senior Member

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    I was a little worried about warping the head. I'll try a lot of heat on the injector first and try the vice method first and then off to find a machine shop near Cirencester to mill it out I expect!
     
  13. Steve@Avantgarde

    Steve@Avantgarde Forum Supporter Authorised Forum Supporter

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    As WG has said do not, in any circumstance apply blow torch heat to the head. You will definately wreck it then.

    Im just wondering what the OP has tried to remove the injector so far because in all my years of working on MBs, I have never had a problem in removing injectors, even the most stubborn, some take more time, effort and skill than others but I have always removed them. If you have the right tools they should come out, eventually.
     
  14. mersum1es

    mersum1es Senior Member

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    http://www.youtube.com/watch?v=0J2KxdN84RM
    :shock::rolleyes::lol:
     
  15. peterwhayward

    peterwhayward Senior Member

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  16. Corned

    Corned Senior Member

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    ^ I was actually a little disappointed. I hoped they would come out of there like two bullets out of a rifle!
     
  17. Steve@Avantgarde

    Steve@Avantgarde Forum Supporter Authorised Forum Supporter

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    Ive seen those monkeys on that video before, they obviously didnt hear of the special tool that works an absolute treat on A classes. I hope that kind of practice doesnt go on in any garage.
     
  18. paul hayward

    paul hayward Senior Member

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    :shock:..yep it sure is!! ... i would just take it to Cole at MBS and let them sort it..right people for the right jobs etc!!......

    same as most things in life.... i know what im good at ..i also know what im bad at ...only do the things your better at!!! makes life less stressful!!:lol:
     
  19. peterwhayward

    peterwhayward Senior Member

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    Yep thats why I dont do the washing and ironing;).
     
  20. Rockall

    Rockall Senior Member

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    Just send him the head via a courier
    Regards
    Bill
     

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