About to go through this process this week, so good timing.
I need some clarification though:
-Slip flange seal over the tube so the end with the o-ring is all the way through
-Place pipe into opening on the engine, gently press into place, assist the flange seal into the opening with your fingers (easy) That's it!
On the first point:
'over the tube' - Where does the flange seal finally end up being? Over the tube and keep sliding it until......? I'm guessing that what you mean is that the flange seal is sitting in the middle of the tube at this point (not it's final resting spot)
'end with the o-ring' - I thought both ends already have o-rings on them at this point?
On the second point:
I'm guessing that you mean to place the pipe into the opening from the bottom side (underneath) of the oil sump and start to pull the pipe UP from underneath? Then, when the flange seal starts to make its way through the hole, keep pulling the tube up and get the flange seal to finally work its way up until it's seated in the correct spot?