Changing the injectors on an M57 engine (not N2 or M47) lots of pictures
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  1. #1
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    Changing the injectors on an M57 engine (not N2 or M47) lots of pictures

    As most BMW diesel owner will know that injectors can be bloody temperamental and changing them can be a pain, so I figure out a way of changing them without taking off the inlet manifold. This only works on the M57 engine and not the 4 cylinder M47 or the newer M57N2 which has a different design of injector.

    Here are some of the tools you will need, a 17mm limited access socket



    A round rasp, socket set, screw driver and long nose and circlip pliers



    Take the engine over off and then undo the three screws that hold the injector electrics on, it is an E7





    The tuck out of the way (handy windscreen washer pipes!)



    Now pull out the circlips that hold the leak off pipes in, using the circlip pliers



    Then pull out the leak off fittings



    Now this is the dodgy bit, the cut outs in the inlet manifold are not big enough and so you need to make then bigger. To do this you need to make it bigger with a rasp, it take about 2-3 mm all round



    Now undo the two 10mm nuts that hold the injector collar on, of a turn on each side at a time.



    Now using the 17mm limited access socket, loosen off the common rail feed pipe



    And finish off with the circlip pliers



    And then move the nut over the pipe



    Then lever the pipe back and wobble the injector at the same time



    It should come free if it is not stuck



    And cleanly out



    Replacement is the same but make sure the collar is on the right way, this is right



    And this is WRONG



    When doing the 10mm collar nuts up again, do them "wrist tight" 1/4 of a turn at a time, each side at a time
    Last edited by E61 Trouble; 02-12-2012 at 20:24.

  2. The Following 6 Users Say Thank You to E61 Trouble For This Useful Post:

    chr15gb (07-04-2013),Ferret (03-12-2012),mjojom (02-12-2012),nutter426 (03-06-2014),Ronnie (02-12-2012),Stal1878 (03-12-2012)

  3. #2
    George - 287k miles :)
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    Did you have any that were stuck? I'm used this as a guide for an M47 and it's pretty similar, although I did it the manifold off way, and injector number 3 won't budge, even after 6 hours of plusgas

  4. #3
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    I was lucky, I have not had one that stuck, the trouble is there's nothing really to lever off, where they've been tight I've used scraper tools are free mounting studs against the bottom of the large hex bolt on top of the injector

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    nutter426 (08-08-2014)

  6. #4
    George - 287k miles :)
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    It came off eventually, after 3 or 4 or 5 days of soaking with plusgas and EGR cleaning solvent it just popped out.

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