Engine Body; Cylinder Block; Positive Crankcase Ventilation (Pcv) System; Pcv Valve - Kubota WG1605-G-E3 Workshop Manual

WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM

1. ENGINE BODY

[1] CYLINDER BLOCK

[2] POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM

[3] PCV VALVE

The engine has a high durability tunnel-type cylinder
block in which the crank bearing component is a
constructed body. Furthermore, liner less type, allow
effective cooling, less distortion, and greater wear
resistance. The noise level is reduced to a minimum
because each cylinder has its own chamber.
To increase the rigidity of the cylinder block, parts of
engine block which support main bearing case has
thicker rib for additional rigidness to improve noise and
vibration.
During normal compression stroke, a small amount
of gases in the combustion chamber escapes past the
piston. Approximately 70 % of these blowby gases are
unburned fuel (HC) that can dilute and contaminate the
engine oil, cause corrosion to critical parts, and
contribute to sludge build up.
The purpose of the Positive Crankcase Ventilation
(PCV) system is to remove these harmful gases from the
crankcase before damage occurs and combine them
with the engine's normal incoming air / fuel charge.
The PCV valve consists of a spring and a valve, and
it is installed between an engine body and an intake
manifold.
The PCV valve controls the inhalation volume of
blow-by gas and the volume of fresh air according to the
engine operation status.
(1) PCV Valve
1-M1
ENGINE
9Y1210661ENM0001US0
9Y1210661ENM0014US0
9Y1210661ENM0015US0
KiSC issued 01, 2012 A