It seems that Lycoming has (at least) two different oil pan designs for the IO-540.
The first design is a system where the intake tubes are cast into the oil sump so this means that the engine oil is dripping down on to the outside of the cast intake tubes that run through the oil sump.
The second design has two separate cavities for the oil sump and intake system where the oil sump is its own cavity above and the intake cavity is a completely separate cavity below.
Does anyone know why they would have the intake tubes run through the oil sump?
Was one a first generation design and then they changed their thought process or was it a carbureted engine verses a fuel injection engine design??
Do they still make both systems?
What are the advantages/disadvantages to each design?
Anyway just curious if anyone has any intel because it seems like such different thought processes.
Thanks
The first design is a system where the intake tubes are cast into the oil sump so this means that the engine oil is dripping down on to the outside of the cast intake tubes that run through the oil sump.
The second design has two separate cavities for the oil sump and intake system where the oil sump is its own cavity above and the intake cavity is a completely separate cavity below.
Does anyone know why they would have the intake tubes run through the oil sump?
Was one a first generation design and then they changed their thought process or was it a carbureted engine verses a fuel injection engine design??
Do they still make both systems?
What are the advantages/disadvantages to each design?
Anyway just curious if anyone has any intel because it seems like such different thought processes.
Thanks