Westerbeke 6.5KW - Page 46

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