Originally Posted by piccolovic

don't know if they have o-rings where the top and bottom of the body screw together, but I had a set where they had disintegrated. Put them on a bench vice, put new o-rings, and snugged them up and put them back in car. Unless you are hearing the nailing, indicating a bad one, I'd just replace 0-rings, snug up, and replace the heat shields or snap gaskets . .. whatever is called for.

Are you seeing pooling at the base where they screw in? That's what my problem was, in addition to needing return lines, and new o-rings for the primer pump!!!!

If all that fail . . . then look at bringing someone else into it to pressure test them, or replace them.

BTW, what's the full description of your auto? year, model, engine?

Originally Posted by Lycoming-8

If I remember correctly, your 220D is a '70 model. Does it not have an all metal banjo bolts and metal tubing return system until the one rubber connection toward the filter? If that is the case, there is only a very small likelyhood that any of that metal system just started leaking. The rubber leaking should not appear to show up as an injector leak, since it is so far away. Could well be the injector to block or PC chamber joint.