Question for 914/6 oil tank/oil change, Does it need a supplemental way to drain? Options

[Krieger]

I have seen some of the members here adding ways to drain the oil tank. 911s have a tank drain, but their tanks are mounted fairly low in relation to the engine. The bottom of the 6 tank is close to being near the same height as the top of the engine caes. Won't the oil just run into the engine case?

[ArtechnikA]

911's and 914.6 have a drain plug in the bottom of the case for oil that has returned to the sump. There's always some. You always drain both places.

If the car has not been sitting long after shutdown, there probably won't be much oil in the sump. The oil pump kinda acts as a one-way check valve, and while a little oil may ooze back through a tight pump, it's not that much. As the pump wears and clearances increase, more gets back through.

In place of the tank drain, 914.6 has a separable fitting in the lower oil line. You use your BIG wrenches in a tight space to open the union, hoping you're prepared for the torrent of 9 quarts draining through a big hose.