4.0L SOHC timing chain question

[Red_Ex_98]

I am doing a timing chain job on my '98 Explorer. Both the front and back cassettes went, however that is not my question. I purchased a DNJ Engine components timing chain kit and it has a part in it that I am not familiar with. It has a plastic rod that is 5 1/4 inches long, 1/4 inch in diameter with both ends tapered to 1/8 inch diameter. Can anyone tell me what this is and where it goes? If it helps, I have yet to take the old timing chains off of the motor yet, so it is not completely torn down.

 

[2000StreetRod]

volume reducer

That's the volume reducer. You carefully remove the galley plug near the front hydraulic tensioner and drop the reducer in the opening. You should have received a new galley plug with the kit. See my helpful threads "starting 00m12 kit installation".