CYLINDER AND PISTON ENG

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 D1 or D2)

–(Maximum D5 or D6)

“R” = (Maximum D1, 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.

a4 mm (0.16 in) from the piston bottom edge.

Piston size P

46.960 ~ 46.975 mm

Standard

(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.

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