Lost Timing Chain Tensioner Piston --Possibly fell into engine?

[lebowski9]

Hi,

2001 X5. 4.4 --Today I was re-replacing the exterior timing chain tensioner because I forgot the crush washer the first time I installed it. (the one that screws into right side of engine).

In case their are any doubts, this is the part no. I am referring to: 11317531813

Well, it was now fully extended and required some force to get the cap's threads to seat. I almost had it but lost my grip at the last second and the tensioner went flying!

So far I have found the cap, crush, washer, and main body + spring of the tensioner. However the end plunger (the smaller part) is nowhere to be found.

Is it possible for this piece to have fallen inside the engine or does the design prevent that?

No good deed goes unpunished...