Mitsubishi S12A2, Руководство по обслуживанию

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7-11
Chapter 7 ASSEMBLY OF BASIC ENGINE
2.5 Cylinder Liner Inside Diameter - Measure
Measure the inside diameter of the cylinder liner at three
levels, i.e., upper (position of No.1 compression ring when
piston is at the top dead center), liner middle position, and
O-ring installed position, in both parallel and perpendicular
directions to the piston pin direction.
Replace the cylinder liner if the value exceeds the limit.If
the liner is distorted, pull-out the liner and re-install paying
attention to O-rings.
Cylinder Liner Inside Diameter - Measure
Cylinder liner dimension measuring position
2.6 Piston and Connecting Rod - Assemble
(1)
Apply engine oil to the piston pin, and assemble the
piston and the connecting rod.The orientation of piston
and connecting rod is shown in the illustration.
Note: The piston and piston pin are made for a clearance fit.
However, the piston pin is more easily inserted into the
piston if the piston is warmed up with a heater or with
hot water.
(2)
Install the snap ring with ring pliers.Make sure that the
snap ring is fully inserted into the ring groove.
Assembling Orientation of Piston and Connecting Rod
Piston and Connecting Rod - Assemble
Item
Nominal
value
Standard value Limit value
Inside diameter
ø150 mm
[5.9 in.]
150.000 to 150.040 mm
[5.9054 to 5.9069 in.]
150.140 mm
[5.9109 in.]
Roundness -
0.02 mm
[0.0008 in.] or less
-
Cylindricity -
0.02 mm
[0.0008 in.] or less
-
Cylinder liner
Direction traverse to piston pin
Direction parallel
to piston pin
100 mm [3.93 in.]
30 mm [1.18 in.]
250 mm [9.84 in.]
(
Right bank Left bank
Part No.
Piston
weight
Direction mark
“F (Front)”
means
engine front
Camshaft
Match mark
A
View A
A
Snap ring