Engine Body; Cylinder Head - Kubota EA330-E4 Series Workshop Manual

EA330-E4, WSM

2. ENGINE BODY

[1] CYLINDER HEAD

As the cylinder head is subjected to high
temperature and high pressure, it is made of special
alloy iron.
The cylinder head is installed on top of the cylinder
block, it houses the intake and exhaust valves (4), rocker
arm (1), injection nozzle (3), and others.
It is also equipped with a decompressor to reduce
compression in the cylinder so the crankshaft rotates
with less force for staring.
The area of the cylinder head that faces the piston
head and forms the combustion chamber has the intake
and exhaust holes and nozzle hole. In the other area, a
lubricating oil gallery, coolant gallery, screw hole, and
others are machined symmetrically with the cylinder
block.
The EA330-E4 engine is equipped with the glow plug
for easy starting even in cold weather.
(1) Rocker Arm
(2) Decompression Shaft
The intake port (1) and exhaust port (2) are cross
flow type which open respectively at both sides of the
cylinder head. In this cylinder head, less exhaust heat is
hardly conducted to the intake port, so that high density
air is always inhaled into the cylinder for stable
combustion.
(1) Intake Port
1-M2
ENGINE
(3) Injection Nozzle
(4) Valve
9Y1211018ENM0002US0
(2) Exhaust Port
9Y1211018ENM0003US0
KiSC issued 05, 2015 A