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CONSTRUCTION AND SERVICING OF CYLINDER HEAD
Cylinder Head
The cylinder head is made of a cast iron and has great rigidity and
excellent cooling property.
It is of the overhead valve type and the
intake port and exhaust port are of cross-flow type,
and the valve
seats and guides are replaceable.
Swirl chamber and glow plug are provided at the left-hand side of the
head to insure complete fuel combustion and better engine starting.
Cylinder Head Gasket
The cylinder
head gasket
is
made of air-tight and durable
material
and
has
stainless
steel grommets in the cylinder
bore
area.
The
gasket
is
coated wi th
sealant on both
sides except where the cylin-
der bore periphery is to pre-
vent oil and water
leakage;
therefore,
no gasket sealant
is needed during assembling.
An
engine
model
mark
is
stamped on the upper side of
the
gasket
(cylinder
head
side)
to help insure proper
positioning.
Valve and Valve Spring
c
C
E
.~
The intake valve has a large diameter
head
to
increase
the
intake
effi-
c iency.
Both the intake and exhaust
valves are steel and the exhaust valve
has
a
welded
special
heat-resistant
steel head to withstand a higher heat.
The upper part of the valve guide is
provided
with
a
valve
stern
seal
to
prevent oil leakage into the cylinder.
The valve spring
is made of a high-
rigidity
valve
spring
steel.
The
spr ing,
spr ing
retainer
and
retainer
lock of the intake valve are identical
to
those
of
the
exhaust
valve.
37
Stem seal
Valve guide
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