Thats not a PD.. the PD has a yellow-orange cap (depending on how much it has been leaking). If you have a FSM or a Haynes, you should be able to tell where it is. It sits beneath the 4 pipes coming from the dynamic chamber (the one with the 13B written on it)

 

Dude.. the 4 O-rings cost $4.44 at NAPA. I have 3 left. Pay for shipping and they are yours.

 

hey i already got o rings. thanks for the offer tho.