Air bubbles arround injectors

[Hooked_on_HP]

I ran my 1900 out of fuel today and when I was bleeding the injectors the fuel was running down arround the base where they screw into the head and I noticed air bubbles. I checked to make shure they were tight and they were. Is there a some type of seal there or is it a machined fit. It isn't leaking bad but it shouldn't leak at all. My service manual wasn't a lot of help.

Bill

 

[Hooked_on_HP]

I should make it clear that it is leaking compression arround the base of the injectors

 

[DieselMonk]

if I remember right my old MF165 had a seal there.

 

[MDM]

Probably some type of brass washer under the injector.