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CYLINDER AND PISTON
Piston pin
ASSEMBLY AND INSTALLATION
Piston
NOTE:
G
G
4 - 44
1. Inspect:
Piston pin
G
Blue discoloration/grooves → Replace,
then inspect the lubrication system.
2. Measure:
Piston pin-to-piston clearance
G
Measurement steps:
Measure the outside diameter (piston pin)
G
a.
If out of specification, replace the piston
pin.
Outside diameter (piston pin):
18.991 ~ 19.000 mm
(0.7477 ~ 0.7480 in)
Measure the inside diameter (piston) b.
G
Inside diameter (piston):
19.004 ~ 19.015 mm
(0.7482 ~ 0.7486 in)
Calculate the piston pin-to-piston clear-
G
ance with the following formula.
Piston pin-to-piston clearance =
Inside diameter (piston) b –
Outside diameter (piston pin) a
If out of specification, replace the piston.
G
Piston pin-to-piston clearance:
0.004 ~ 0.024 mm
(0.00016 ~ 0.00094 in)
<Limit>: 0.07 mm (0.003 in)
1. Install:
Piston rings
G
Onto the piston.
Be sure to install the piston rings so that the
manufacturer's
marks
located on the upper side of the rings.
Lubricate the piston and piston rings liberally
with engine oil.
ENG
or
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