99 606 injectors rebuilt about 5,000 ago. I pulled the cover of the the top of the injectors to inspect the plastic breather tubing that is leaking and I found this in the third injector well (full of diesel)



I swapped out some return line from another injector to see if it was the new return line that I replaced at the same time with the injectors. With engine running it looks like bubbles at the bottom of this injector so I pulled injector to see if I installed the seal wrong and it I think its correct (above pic) and I re-torqued but I still get bubbles at the bottom of the injector.

This is what I think is the wrong way to install the injector seal:

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1999 E300 TD 190,000
1996 Passat TDI 225,000-sold
1996 E300 120,000-sold
1998 Jetta TDI 186,000 -sold
1983 Chev Suburban C20 6.2-sold