Fuel injector, replace tip cover, or just seals? 240 '86

[DL152279546231]

My parts store sells a Bosch fuel injector seal kit for my '86 240 which
includes 4-5 pieces, 3 seals, a small gray round plastic thing which looks like
a spacer, and a plastic cap with a pin hole in it which I believe covers the
end of the injector. Do I need all of these parts, should I use them or just
leave them alone if I am trying to stop a fuel leak on one injector?

 

[Vic]

where is the injector leaking? where it meets the fuel rail?

Vic [email protected] Ithaca, NY

 

[James Sweet]

My parts store sells a Bosch fuel injector seal kit for my '86 240 which
includes 4-5 pieces, 3 seals, a small gray round plastic thing which looks like
a spacer, and a plastic cap with a pin hole in it which I believe covers the
end of the injector. Do I need all of these parts, should I use them or just
leave them alone if I am trying to stop a fuel leak on one injector?

A fuel leak? As in into the injector or is it leaking and flooding the
intake?

I replaced the caps on some injectors recently just because the kit came
with new ones, probably wouldn't bother unless the originals were cracked or
otherwise damaged though.