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CYLINDER AND PISTON
4 - 34
2. Measure:
Piston-to-cylinder clearance
Piston-to-cylinder clearance measure-
ment steps:
1st step:
Measure the cylinder bore "C" with the cyl-
inder bore gauge.
NOTE:
Measure the cylinder bore "C" in parallel to
and at right angles to the crankshaft. Then,
find the average of the measurements.
54.000 ~ 54.019 mm
Cylinder bore "C"
Taper limit "T"
Out of round "R"
"C" = maximum of D
~ D
1
"T" = maximum of D
, or D
1
maximum of D
or D
5
"R" = maximum of D
, D
1
minimum of D
, D
2
If out of specification, replace the cylinder,
and replace the piston and piston rings as
set.
2nd step:
Measure the piston skirt diameter "P" with
a micrometer.
a 5 mm (0.20 in) from the piston bottom edge.
53.977 ~ 53.996 mm
Standard
(2.1251 ~ 2.1258 in)
If out of specification, replace the piston
and piston rings as a set.
3rd step:
Calculate the piston-to-cylinder clearance
with following formula.
Piston-to-cylinder clearance =
Cylinder bore "C" –
Piston skirt diameter "P"
Piston-to-cylinder clearance:
0.020 ~ 0.026 mm
(0.0008 ~ 0.0010 in)
<Limit>: 0.15 mm (0.006 in)
ENG
(2.126 ~ 2.127 in)
0.05 mm (0.002 in)
0.05 mm (0.002 in)
6
–
2
6
or D
–
3
5
or D
4
6
Piston size P
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