Thread: What is the name of the plastic piece on the very tip of the injector? (pic inside)

Originally Posted by BillBoost37

If you are talking about the piece that holds the o-ring on, it's unnecessary. It's only there to hold the ring. And the rings will hold on to install w/o worries, will sit on the head when you remove. They won't go into the head as they are larger than the injector hole.

X3...But I believe its called the pintle cap.

It appears as if the O-ring is seated on the piece; so it's fine if it's seated directly on the injector?