Working on a 77 Volare power steering. The nipple looks like it may have been leaking (kinda hard to tell for sure) I removed the metal nipple and I was surprised there wasn`t a copper washer between the nipple and the aluminum piece. I didn`t see anything in the parts book. I just went out to a 76 p/s box I had that was OE and it has the angled nipple on it. I removed the nipple to see if it has a washer and it didn`t have one either. Whats up with that???? Now I`m really confused. Should it have a washer? If not how does it seal? Older parts book show 1618611 for a washer.