4-4
CONNECTING
ROD
and
PISTON
I
The
connecting rod is forged of aluminum alloy,
0
small
ends.
which itself serves as bearings at 'both the large and
The piston
is
cast of aluminum alloy, and has grooves
for receiving two compression rings and one
oil
ring.
(See Fig.
5.)
Fig.
5
4-5
CAMSHAFT
The camshafts are integrally built with a cam gear of
special cast iron, and have intake and exhaust cams.
Also
the camshafts have aluminum plain bearing
attached to both ends.
(No
ball bearing is used.)
(See Fig.
6.)
4-6
VALVE ARRANGEMENT
The exhaust valve is located upstream of the cooling
air with the result that the exhaust valve is intensive-
ly cooled for improved engine durability. The inner
side of the valve head is reinforced with hard alloy
fused to it for added durability. (See
Fig.
7.)
Top
Ring
Second Ring
Oil
Ring
Connecting Rod
2
Fig..
6
I
Exhaust
Valve
-
DirecGon
of
Coolin'g
Wind
Fig.
7
-5-
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