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Group 21 Engine Body
96
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When replacing cylinder liner
1.
Remove the cylinder liner (Refer to section Re-
place cylinder liners) and observe the cylinder
liner contacting surface to the crankcase.
2.
If the cylinder liner contacts the crankcase only
on one side, use a rotary grinder to grind the
surface to keep the differences of depth in four
positions within 0.05 mm [0.0020 in.].
3.
Use the Projection plate (B) and measure the
counter bore depth of the crankcase in four po-
sitions and obtain the average.
4.
Subtract the Projection plate thickness from the
measured counter bore depth to obtain the ac-
tual counter bore depth from the top surface of
the crankcase.
Crankcase counter bore depth (A), mm [in]
Assembly standard ... 14.00–14.05 [0.5500–0.5520]
5. Measure the thickness of the cylinder liner collar.
Thickness of cylinder liner collar, mm [in]
Assembly standard ... 14.16–14.20 [0.5563–0.5579]
7. Subtract the crankcase ridge depth from the cyl-
inder liner collar thickness. This value is the cylin-
der liner protrusion.
8. If the value is less than the assembly standard,
insert a shim under the collar of the cylinder liner.
Measuring step height of cylinder liner collar
1. Place a dial gauge on the rim of the liner collar,
and set the indicator to 0 (zero).
2. Measure the cylinder liner step at four locations,
and obtain the average.
Cylinder liner step height, mm [in]
Assembly standard ... 0.16–0.24 [0.006–0.010]
3. If the average is less than the assembly standard
or if the step has sectional chipping, replace the
cylinder liner.
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