1940 super oil leaking from vent in vacuum pump

[Justinlb]

I have the same exact symptoms as the post linked below. How can I fix this issue? I rebuilt my pump probably a year ago, but I don't remember there being anything stopping the oil from going through the vent from engine blow by. Any help would be greatly appreciated 🙏

 

[kgreen]

Would the crankcase ventilation system be plugged or restricted?

[Justinlb]

Checked the crankcase ventilation,  it was all Good! But I found the issue.. there's a seal inside the pump. and when I aligned it with the hole it's supposed to seal I get this, no matter how I turn it. Either it was a defective part or the diaphragm plate shifted over from Installation error (most likely).

Edited October 5, 2022 by Justinlb (see edit history)

[Bloo]

Oh wow. Even with your big red arrows I had to look at that several times before I saw it.

 

[EmTee]

Hmmmm, I see the misalignment of the plate on the diaphragm, but where is the oil coming from?

[Justinlb]

17 minutes ago, EmTee said:

Hmmmm, I see the misalignment of the plate on the diaphragm, but where is the oil coming from?

Since the plate was offset, it was making the seal offset too, this hole is where the rocker arm is so it was just blowing oil up and draining out the square vent.