Boss,. Do you know the correct capacity if oil for the rack?
BTW. Clean everything with alchol5 or brake cleaner squeaky clean then, I'd try Honda (grey) or Chrysler silicone. Seems to work best for oil. It's our go to for potential problem gaskets. Coat the rack and let it skin over to the touch. Should fill any surface irregularities. Let it set at least overnight before you mess with it.