First, my current engine is a d15b7. I am swapping the head out for a d16z6 head. Ive heard about this oil control jet. Is the jet on the d15 block? If so what do I do with it? I ran a search and someone said you pull it out. Is that all you need to do? or must you pull it from the d15 block and put it in the d16 head? Im confident I can do the swap, but this is the last thing I need to know, its got me really confused. Thanks for any help