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Mystery part from cylinder head

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Old Nov 30, 2021
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Mystery part from cylinder head

Hi all,
Hoping someone can help identify this piece that may or may not have fallen out of a 99 civic head. I was turning the head over to clean it and this piece dropped on my work bench.
I'm thinking it's a piece of a fuel injector that may have found it's way into the head valley. The injectors were replaced recently, probably while the valve cover was off. I didn't replace the injectors, so I don't know for sure.


Side view

Small pinhole. Piece is about 1 inch across.

Hard to tell from the pics, but top and bottom are brown with black oring in between. The metal piece on one end seems to be a clip holding it all together.

Just want to make sure it's nothing before I toss it.

Thanks in advance.
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Old Nov 30, 2021
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Re: Mystery part from cylinder head

That definitely looks like a broken piece of a fuel injector. Specifically the squirty end
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Old Dec 1, 2021
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Re: Mystery part from cylinder head

Very good. Thanks for the quick reply!

+1 for "squirty end"
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Old Dec 1, 2021
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Re: Mystery part from cylinder head

I like to be silly sometimes. lol. It was the best description I could come up with at the time

But yeah, the first picture, the top of the plastic portion that has the fin-like structures. Kinda looks like it has an uneven shear surface so it leads me to believe that part sheared off of the main injector body
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