OK
![Grin ;D](http://forums.sohc4.net/Smileys/default/grin.gif)
, I give you that, let's say almost zero pressure.
![Grin ;D](http://forums.sohc4.net/Smileys/default/grin.gif)
The oil return to the tank goes into the bottom of the tank - means it goes against the pressure of 6? or so inches of oil.
While ago I was thinking about hooking up a gauge to measure this
![Smiley :)](http://forums.sohc4.net/Smileys/default/smiley.gif)
The other hose gravity feeds the oil pump - again no big pressure to be concerned about. You can use a hose and clamp and it will hold the oil just fine.
Please, look at the oil schema, it will give you better understanding than my clumsy English.
I think Mafia has a point, custom tank could be missing a vent.