Daewoo MUSSO Service Manual page 211

1B2-20 M161 ENGINE MECHANICAL
Operation When Full-Load at Partial Load
The throttle valve (6) is partially opened or fully opened.
The air flows very rapidly through the vent line(5)s
connection(D) and the intake air duct when full-load at partial
load.
Consequently, most of the low-by gases are supplied to the
combustion chamber through the timing gear case
cover(15), chain housing(17), oil separation chamber(3),
vent line(5), throttle valve(6), and intake manifold(8).