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CYLINDER HEAD AND CYLINDER
7. Eliminate:
•
NOTE:
Sand in a crisscross pattern. Do not sand exces-
sively.
SCH5160
8. Measure:
•
Measurement steps:
1st step:
•
Measure the cylinder bore (C) with a cylinder bore
gauge 1.
NOTE:
SCH5170
Measure the cylinder bore (C) parallel to and at right
angles to the crankshaft. Then find the average of the
measurements.
Cylinder bore
Taper (T)
Out of round
C = Maximum D
T = (Maximum of D
R = (Maximum of D
•
If out of specification, replace cylinder, and re-
place piston and piston rings as a set.
SCH5180
5-10
Score marks and lacquer deposits
(from the piston wall)
Use 600 ~ 800 grit wet sandpaper.
Piston-to-cylinder clearance
Standard
70.500 ~ 70.520 mm
(C)
(2.7756 ~ 2.7764 in)
_
_
(R)
or D
) –
1
2
(Maximum of D
or D
)
5
6
, D
or D
1
3
(Minimum of D
, D
or D
2
4
ENG
Wear limit
70.600 mm
(2.7795 in)
0.05 mm
(0.002 in)
0.01 mm
(0.0004 in)
) –
5
)
6
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