Basic Engine Building DVD - Chapter 49: Valve Lash Adjustment
You should have done this previously in the "Pre-Assembly" section. This
time it's for real. You want to leave as much of the internal lubrication
in place as possible. If you follow the firing order of your motor, you'll
only have to turn the crankshaft one complete rotation. This section has
some of the more detailed 3D models to show you the internals of a working
motor.