you could be talking about any of 3 parts. if any of them are missing it can leak. there are 3 hard plastic spacers between the rain and the manifold (blue arrows), 4 rubber seals on top of the injectors (yellow arrows) and 4 seals at the base of the injectors (red arrows). if any of them are missing it can cause a leak. sometimes the ones on top of the injectors get stuck in the rail and dont come out with the injector. find out which one(s) missing and replace it. but, no you dont HAVE to replace them unless they disintigrate or ou lose them.


yes i jacked your pic