Curiousity Q: Oil path/flow in an engine
 

I've been looking at Wayne's engine rebuild book and realized that though I consider myself knowledgeable on how an internal combustion engine works, I have no clue how the oil moves throughout a motor.

Can someone describe the flow path for me from the point the oil goes through the pump? Specifically:

-How does the oil get to the journals on the crankshaft?
-How does it get on the cylindar walls?
-How does it get to the camshaft, rockers and valve stems?

I realize there are oil holes/squirters in the engine but are there oil passages built into the case that recieve pressurized oil from the pump?

A graphic would be awesome. Any engine type exemplifying oil flow would suffice. I assume the principles are similar enough (i.e. nothing unique about a 911 engine oil flow outside of the dry sump system).

Thanks, Gordo

This is a nice diagram. Unfortunately I didn't record the source when I downloaded it.
Perhaps someone will recognize this and credit the source. http://forums.pelicanparts.com/uploa...1140924586.jpg

Perfect!
 

Thanks 2.7 Racer, exactly what I was looking for. First time I have seen that diagram.

Further questions:

-Are the lines that run to the crankshaft and up to the cam towers oil passages built into the block?

-How does the oil get to the cylindars and piston pins?

Thanks, Gordo

The above figure is just a schematic; oil is pumped down drilled passageways in the center of the crankshaft and through a spray bar in the cam towers.

The source of that picture is from a PCA Panorama magazine from a few years ago... Lou

I added the piston squirters (red dots) and the internal
crankshaft drilling (green lines). The rod journals are
fed from the #1 and #8 main bearings.

http://forums.pelicanparts.com/uploa...1140983340.jpg


Best,
Grady