Lingenfelter L200010000 Lingenfelter Air Oil Vapor Separator Kit v1.1 - Manual (Page 7)

Page 6.
9. Run the hose from the bottom of the
seperator oil return pipe fitting to the oil sump.
Some fabrication may be required in order to
install the fitting or bung for a return line that runs
into the oil sump. If possible, select a location
that is below the oil level in the pan or sump tank.
10. If you are running a turbo system that has
an oil return line with a scavenge pump, you may
also T into your turbo return line. Be careful as
some turbos are very sensitive to back pressure.
Ensure that no back pressure is being made or
install a fitting or bung on your oil pan instead.
11. If your return line returns the oil to a
location that is above the oil pan level, make
sure to install an in-line check valve (part
# L200030000). This check valve is one-
directional, so make sure to install the valve in
the correct direction. The oil should flow into the
valve through the barbed end and out of the valve
through the straight end, as shown by the black
arrows in the adjacent illustration.
12. Start your vehicle and check for any oil
leaks. Your installation is now complete.