Injector Seals

[fuzzman]

Put this in the wrong forum yesterday, sorry if you are reading it twice...

I have a stiction issue and an occasional hard start. I'm going to pull my injectors and clean the spool valves, replace the dummy plugs and stand pipes. While I'm at it I'll of course replace the injector o-rings and copper washers at the tip. My question is should I replace the injector high pressure oil seals?

Only reason I ask is that sometimes I seem to cause more problems than I'm solving, and if these things don't fail maybe I won't open it up...

Here's a link to a picture of the seal I'm talking about:

http://www.thedieselstore.com/templa...Num=APPAP0002#

I'm talking about the seal labeled "B" in the second image.

Thanks!