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ENG
CYLINDER AND PISTON
2.Measure:
●Piston-to-cylinder clearance
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Measurement steps:
1st step:
●Measure the cylinder bore “C” with the
cylinder bore gauge.
N
OTE:
Measure cylinder bore “C” by taking side-to-
side and front-to-back measurements of the
cylinder. Then, find the average of the
measurements.
●If out of specification, replace the cylinder,
and the piston and piston rings as a set.
Cylinder bore “C” 84.500 ~ 84.510 mm
(3.3268 ~ 3.3272 in)
Max. taper “T” 0.05 mm
(0.0016 in)
Out of round “R” 0.01 mm
(0.0004 in)
“C”= maximum of D1 ~ D6
“T”= maximum of D1, or D2 –
maximum of D5 or D6
“R”= maximum of D1, D3 or D5 –
minimum of D2, D4 or D6
2nd step:
●Measure piston skirt diameter “P” with a
micrometer.
a5.0 mm (0.20 in) from the piston bottom edge
●If out of specification, replace the piston and
piston rings as a set.
Piston skirt diameter “P”
Standard 84.445 ~ 84.460 mm
(3.3246 ~ 3.3252 in)