Wet vac pump question

In my continuing effort to plug all the oil leaks in my Continental 0-300 I
have a final question about wet vacuum pumps. How much oil out the vent is too
much? This is a '61 C-172 with the factory standard oil recovery system off the
wet vac. About twice as much oil comes out the vacuum vent as out the engine
vent. Is that normal and if not what is the fix? Are there seals in the pump
that wear out or something? Any info would be appreciated.

Jim