Hi

Fairly new ti these cars, during an oil & filter change today I noticed what seems to be a slight leak on the no.3 injector (pic below)

Being fairly new to diesel engines I'm hoping someone here advise me:

1) Is it worth trying to fix the leak, or should jump straight to replacing the injector?

2) If it has to be replaced, can I change just the one injector, or does it need to be a set?

3) Anything in particular to look out for when doing the job?

Tis

 

Biggest problem you'll have to change it is getting the injector out.
There's a copper washer and an O-ring in there.
When my copper washer or o-ring went, there was a black sticky gunk buildup around it. Ticking sound and a smell of fumes inside the cabin coming through the ventilation.

Although, thinking about it, the leaks more likely from the metal pipe attached to the injector? I'd try a little tighten of that first, gently and slowly to make sure it's not going to distort or snap. Failing that, I'd renew the pipe.

Pretty sure the injectors aren't coded on the GV, and changing 1 would be fine.