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Westerbeke 6.5 MCG - CRANKSHAFT, BEARING AND OIL SEAL; MEASURE THE CRANKSHAFT OIL CLEARANCE

Westerbeke 6.5 MCG
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CRANKSHAFT,
BEARING
AND
OIL
SEAL
R -
0.059/N
[1.5MM]
MEASURE
THE
CRANKSHAFT
OIL
CLEARANCE
The
crankshaft
oil
measured
by
using
a plastic
gauge
as
follows:
1.
The
oil
and
grease
and
other
foreign
matters fonn the
crankshaft
journal
and
bearing
inner surface.
2.
Install
the
crankshaft.
3. Cut the
plastic
gauge
to
the
same length
as
the
width
of
the
bearing
and
place
it
on
the
journal
in
parrallel
with
its
axis.
4.
Gently
place
the
main
bearing
cap
over it and
tighten
the
bolts
to
the
specified
torque.
5.
Remove
the
bolts
and
gently
remove
the
main
bearing
cap.
Measure
the
width
of
the
smashed plastic
gauge
(at
its
widest
section)
by
using
the
scale printed
on
the
plastic
gauge.
SCALE
PLASTIGAUGf·
INSPECTING
THE
CRANKSHAFT
REAR
OIL
SEAL
1.
Inspect
the
oil
clearance
lip
for
wear
or
damage.
Check
the
rubber
portion
for
deterioration
and
hardening.
Replace
the
seal
if at all
suspect.
2.
Check
the
oil
case
for
cracks
and
damage.
If
here
is
damage,
replace
the
case.
32
CRANKSHAFT
BEARINGS
SPECIFICATIONS
Upper
and
Lower
.
When
the
bearings
are
to
be
replaced,
select
the
correct
ones
and
install
them
in
positions
according
to
the
identification
marks
stamped
on
the
crankshaft
and
the
top
surface
of
the
cylinder
block.
CRANKSHAFT
JOURNAL
DIAMETER
Identification
Marks
1
2
3
Journal
Diameter
1.5746-1.5748
in
~39.994-
40.0DOmmJ
1.5743-1.5746
in
39.988-
39.994mm
1.5741
·1.5743
in
39.982
•
39.988mm
N0.2
ARM
CRANKSHAFT
BEARING
THICKN~SS
CAMSHAFT
JOURNAL
Identification
Colors
brown-
blue
yellow
green
Bearing
Thickness
0.0783-0.0784
in
(1.988
-1.991mm!
0.0784
•
0.0785
in
{1.991
•
1.994mm
0.0785
•
0.07861n
1.994
·1.997mm
0.0786
•
0.0787
in
1.997
•
2.000mm
0.0787
-
0.0789
in
{2.000
-
2.003mm
CYLINDER
BLOCK
CYLINDER
BLOcK
BEARING
DIAMETER
Identification
MarkS
0
I
][
Bearing
Inner
Diameter
·1.7323
-1.7325
in
~44.000
•
44.006mm}
1.7325-1.7328
in
44.006-
44.012mm
1.7328
-1.7330
in
44.012-
44.018mm
BEARING
IDENTIFICATION
MARKS
CRANKSHAFT
BEARING
SELECTION
CHART
Crankshaft
Journal
Crankshaft
Bearing
Cylinder
Block
Bearing
ldentlfJCatlon
Marks
Identification
Marks
Identification
Marks
1
brown
0
I
blue
][
2
0
blue
I.
yellow
:u:
3
blue
0
yellow
I
green
][

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