Isuzu C240 - Page 71

TCM sHoP MANUAL
2. Cylinder Liner Installation Using Dry Ice
Cooling the cylinder liner with dry ice will cause the
cylinder liner to contract, thus making installation
easier.
Note:
It is important that the cylinder liner be inserted to the
cylinder body immediately after it has been cooled.
WARNING:
DRY ICE MUST BE USED WITH GREAT CARE. CARE-
LESS HANDLING OF DRY ICE CAN RESULT IN SEVERE
FROSTBITE.
Piston Grade Selection
The term “piston grade” refers to the piston diameter
and cylinder liner bore combination.
Selection of the proper piston grade will ensure efficient
engine operation, free from cylinder liner and piston
problems.
Cylinder Liner Bore Measurement
Measure the cylinder liner bore after installing the
oylinder liner. Then select the appropriate piston grade
for the installed cylinder liner.
1, Measure the cylinder liner bore.
Refer to “Cylinder Liner Bore Measurement”.
Measuring Points @: 20 mm (0.79 in)
140 mm (5.51 in)
2. Measure the cylinder liner bore at measuring point
@ and @ in four different directions (W - W, X - X,
Y-Y, and Z -Z).
3. Calculate the average value of the eight measure-
ments.
Cylinder Liner Bore mm (in)
86.021 — 86,060 (3.389 - 3.390)
Note:
It is most important that the correct piston
used. Failu
result in engine failure. Always measure the cylinder
bore and select the correct piston grade.
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