Tutorial how to make engine part 13

Crankcase - 2
-
Step 1:
open a sketch on the front of the body and draw a circle
-
Step 2:
extrude it at two directions
-
Step 3:
open a canal
-
Step 4:
open a sketch under the body and draw circles like this
-
Step 5:
use cut extrude command
-
Step 6:
open a sketch same surface again. draw circles like this. we will use cut revolve command, so don' forget the axis
-
Step 7:
use cut revolve command. select the circles and axis
-
Step 8:
now oil canals are ready