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ENG
CYLINDER AND PISTON
Cylinder bore “C”
47.000 ~ 47.005 mm
(1.8504 ~ 1.8506 in)
Taper limit “T” 0.05 mm (0.002 in)
Out of round “R” 0.05 mm (0.002 in)
“C” = Maximum D
“T” = (Maximum D
1 or D2)
– (Maximum D
5 or D6)
“R” = (Maximum D
1, D3 or D5)
– (Minimum D2, D4 or D6)
● 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 4 mm (0.16 in) from the piston bottom edge.
Piston size P
Standard
46.960 ~ 46.975 mm
(1.8488 ~ 1.8494 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:
0.025 ~ 0.045 mm
(0.0010 ~ 0.0018 in)
<Limit>: 0.15 mm (0.0059 in)
● If out of specification, replace the cylinder,
and replace the piston and piston rings as
set.