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Checking Cylinder Block
1.
Check
damage
repair
block.
the
cylinder
block
for
or cracks.
If necessary,
or
replace
the
cylinder
2.
Check to see that the oil pas-
sages
and
coolant
passages
of
the cylinder block are open.
If
clogged, remove with compressed
air or a wire probe.
3.
Check
the
cylinder
block
for
distortion.
If it exceeds the
limit,
repair
or
replace
the
cylinder block.
4.
5.
Warp limit:
0.15 mm (0.006 in)
Check for scratches or burns on
the
cylinder
walls.
If
necessary,
repair
by bor ing or
replace the cylinder block.
Measure the wear on the cylinder
bores at the six positions shown
in
the
figure
with
an
inside
micrometer.
(The wear
is
the
difference
between
the
maximum
X_X'IS the thrt/$! direotion
and minimum diameters.)
If the wear
limit, rebore the cylinder.
is more than the specified
Standard bore diameter:
11 KW:
77.0 - 77.019
mm
(3.03l5 - 3.0323 in)
6.5
&
8 KW:
70.0 - 70.019
mm
(2.7559 - 2.7567 in)
Maximum difference in bore:
0.15 mm (0.0059 in)
Inner diameter error of each cylinder:
0.09
mm
(0.0035 in)
or more
Select
oversize
pistons
according
to
the
maximum wear
on
the
cylinder bore.
Oversize pistons available:
0.25
mm
(0.010 in)
0.50
mm
(0.020 in)
*0.75
mm
(0.030 in)
*1.00
mm
(0.040 in)
*for 6.5
&
8 KW only
40
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