Oil pan screw

[Naileyou]

Does anyone know the specific type of screw that goes into the oil pan that's just behind the flywheel under the engine?

[Surcouf]

in the middle hole: NONE

It is a "safety" drain, for any oil that would make it past the seal around the shaft, and get to the flywheel; goal is to avoid any oil accumulation around a rotating flywheel. Oil passing the seal should normally first flow through (3?) dedicated drains hole toward the oil pan.

If you see oil flowing here, most likely cause is overfilling the engine with oil, or tilting it toward the front why lifting the engine (do not ask me how I know that)

[Naileyou]

in the middle hole: NONE

It is a "safety" drain, for any oil that would make it past the seal around the shaft, and get to the flywheel; goal is to avoid any oil accumulation around a rotating flywheel. Oil passing the seal should normally first flow through (3?) dedicated drains hole toward the oil pan.

If you see oil flowing here, most likely cause is overfilling the engine with oil, or tilting it toward the front why lifting the engine (do not ask me how I know that)

Cool thank you a lot. That has salved a lot of thought.

[Surcouf]

Cool thank you a lot. That has salved a lot of thought.

I tried every screw I had on hand, started to try to run a tap into it, with cold sweat on my back... and realized this was being stupid, had to stop and start thinking... I actually put that in my "overhaul walk of shame" in the Captain section of that forum