Fuel leaking around bottom of injector

[willrev]

1982 300sd. Fuel recently started leaking out around the bottom of the first injector. I replaced all the return lines with new braided line. It looks like it is coming from the bottom of the injector, not where the metal line connects or where the braided line connects. It is definitely where the injector screws into the head.

See picture.

[meltedpanda]

looks like the compression seal around the injector. Do you hear a "spitting" sound in that area, like air escaping? Are these original?