W124 300D Injector leaking - help needed identifying parts

[roadhog]

Hi all,
I have done a search on leaking injectors but failed to come up with an answer.
My '93 300D has sprung a leak and I need help identifying the culprit. With the engine (603.912, 12 valve) running I can see fuel bubbling out from underneath the #6 Injector, between the cylinder head and what looks like a black plastic adaptor/bush (?). This is the part I need to identify.
I have the German equivalent of a Haynes manual and it calls it a 'Abdichthuelse' which roughly translates into Sealing Bush but when I tried to order a new one from my local Merc stealer it was the wrong part.
So far I've not dismantled my car as I need to use it, I was trying to get the parts before starting the job.
Is this part likely to cure my leak or is there anything else causing it?
Any help appreciated.

 

[Parrot of Doom]

Hi there.

Might I suggest that you try asking here:

http://www.mercedesshop.com/shopforum/index.php

Not because you won't get good answers from this forum, but because there are loads of 603 owners on there, and they'll know exactly what you need.

 

[roadhog]

Cheers for that, I'll give them a try as well.

 

[roadhog]

Well, my leak turned out to be nothing more than perished return lines. Thanks to the excellent link by Mr Parrot I was able to cure it.
However, I've yet to find an explanation for the bubbles appearing at the base of the injector. Having removed them (for a refurbish there appears to be a small hole next to the thread in the cylinder head. I vaguely remember someone else asking about them on here but can't seem to find the thread. Anyone know why that hole is there?

 

[carvedonrock]

Hi Roadhog,
I posted a question about a fuel leak,I cant find the thread either.So far,it seems that the injectors are screwed into a steel sleeve.The leak appears to be between the steel sleeve and the aluminium cylinder head.I think the sleeve will screw out if I can find a splined bar approximately 25mm diameter.If all this is correct,Iwill post the results.

 

[roadhog]

As above, check your return lines first. I took my injectors out for a refurb a while ago, I shied away from taking out the chambers, too scary if it goes wrong.
Good luck and let us know how you go.