Injector question

[Dad]

I changed all the o-rings on my injectors a week ago. Yesterday #4 started leaking so I popped the rail off to re-seat. All the injectors came out with the rail and popped out of the manifold as well. One of them the o-ring and the little plastic(?) collar below the o-ring came off and were down in the manifold opening. I was able to get the o-ring but the little collar went through and is gone forever. Do I need to replace that thing? There are no leaks now after reassembly.

 

[RLF9409]

I know this! Experienced the same...
Pintle cap.
Used to hold the o ring and center the injector.

https://www.mrinjectorparts.co...Injector_Service_Kits_002.html

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[01yellerCobra]

So the plastic piece is stuck in the fuel rail?

 

[Dad]

No, it went down the intake. I have no leak currently, but I am guessing that is a very real possibility in the future. I also figure that little sucker went past the valves and is melted in the cat converter.