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CYLINDER/PISTON INSPECTION
CYLINDER
Inspect the cylinder bore for scratch, wear
o
r dam-
age.
Measure
the cylinder
I.D.
in
the X
and
Y axes at
three levels.
Take
the maximum reading to determine
the
cylin-
der
wear.
SERVICE
liMIT:
78.025
mm
(3.0718
in)
Calcu late
the
piston-ta-cylinder clearance.
Take
a maximum
readi
ng to determine
the
clear-
ance.
For
piston O.D (page
9-6).
SERVICE
LIMIT:
0.085 mm (0.0033 in)
CYLINDER/PISTON
Calculate the taper and out-ot-round at three levels
, -
-- - - - -
--
-- - - - - - - -
i
n the X and Y axes. Take the maximum reading to
determine the
cylinder
condition
.
SERVICE
LIMITS:
Taper:
0.010 mm (0.0004 in)
Out-ot-round
:
0.010 mm
(0.0004
in)
Inspect
the
top of the cylinder
for
warpage.
SERVICE
LIMIT:
0,05
mm
(0.002
in)
PISTON/PISTON RING INSPECTION
Remove
the carbon or deposits from the piston
head
or
piston
ri
ng grooves.
Inspect
the
piston for damage and the ring grooves
for wear.
TOP
MIDDLE
SOnOM
y
.....
--
-
-
X
,
' -
----'
.
/
- ---
. ....
/
"
-
.............
_-
/
--
---..
.
. ...
,
-
/
~
PISTON RING
9-5
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