Hello,
One of my SIEMENS injectors leaks diesel between the injector body and the bottom of the fitting (see the image). First I though it was leaking from the top of the fitting where it meets with metal fuel line (because pipe was wet as well) so I spend 4 hours to remove everything, refit the pipe. But when I check after a few days of driving, I realized that it leaks from the bottom of the fitting. 

Now, how can I fix it? Is there an o-ring there? If so what size? If there's no o-ring, should I just remove it and put some teflon tape on, will that work?

Thank you!

 

Hi, I don't know the Siemens injectors, but I do know that diesel dissolves 'normal' O ring rubber, but don't know about teflon.

18 minutes ago, nicam49 said:

Hi, I don't know the Siemens injectors, but I do know that diesel dissolves 'normal' O ring rubber, but don't know about teflon.

You're right. I've seen a video. Seems like there's a metal seal under that fitting but cannot find it anywhere also no info about the dimensions. I don't know what to do at this point. 

The fuel pressure is incredibly high there, soft seals won't work.  I think the best idea is to contact an injector refurbisher to ask if they'll supply you a single metal seal.

Swadlincote Diesels, or Bob Beck, Leamington Spa both on the web, you could contact..

 

14 hours ago, nicam49 said:

Swadlincote Diesels, or Bob Beck, Leamington Spa both on the web, you could contact..

 

I don't live in UK, but I will check my local injector shops. Thank you!