ENGINE
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
1-M3
[6] PISTON AND PISTON RING
Piston and Piston Ring
The piston has a slightly oval shape when cold
(in consideration of thermal expansion) and a concave
head.
Top Ring:
The top ring is of plain barrel face type. The barrel
face type has an arc sliding surface easy to run in and
prevents abnormal wears by providing a maintained oil
film against the lined wall.
Second Ring:
For the second ring, the tapered outer surface area
that comes in contact with the lined wall is reduced to
obtain a high surface pressure for the prevention of gas
leakage, compression leakage and oil spillage.
Oil Ring:
Oil ring consists of three steel components, that is
upper and lower rails and one spacer being held
between two rails. This function is particularly effective in
preventing oil-up because of high boost at the time of
engine coasting.
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[7] CONNECTING ROD
The connecting rod (2) is used to connect the piston
with the crankshaft. The big end of the connecting rod
has a crankpin bearing (3) (split type) and the small end
has a small end bushing (1) (solid type).
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[8] CAMSHAFT
The camshaft (1) is made of special cast iron, and
the journal and cam sections are chilled to resist wear.
The cams on the camshaft cause the intake and
exhaust valves to open as the camshaft rotates. The
bearing and journals are force-lubricated.
A rotation detective pin is attached to the cam gear.
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(1) Combustion Chamber
(2) Top Ring
(3) Second Ring
(4) Oil Ring
(1) Small End Bushing
(2) Connecting Rod
(3) Crankpin Bearing
(4) Connecting Rod Cap
(5) Connecting Rod Screw
(1) Camshaft
(2) Feather Key
(3) Camshaft Stopper
(4) Cam Gear
(5) Pin
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