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Replace the piston if scratches or
seizure is evident on its surfaces (especially the
thrust surface). Replace the piston if it is
cracked.
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1.Insert the piston pin into
the piston pin hole with a thumb. You should feel a slight
resistance. Replace the piston pin if it can be easily
inserted or there is excessive play.
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2.The piston and piston pin
must be replace as an assembly.
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1.Check for side
clearance.
If the limit is exceeded, replace the ring or
piston, or both.
Standard
value:
No.1: 0.03 -
0.07 mm
No.2: 0.02 -
0.06 mm
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2.Install the piston ring
into the cylinder bore. Force the ring down with a piston,
the
piston crown being in contact with the ring, to correctly
position it at right angles to the
cylinder wall. Then, measure the end gap with a feeler
gauge.
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If the end gap is excessive,
replace the piston ring.
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Standard value:
No.1 ring:
0.25 -
0.40 mm
No.2 ring: 0.35 -
0.50 mm
Oil ring: 0.10 -
0.35 mm
Limit:
No.1, No.2
ring: 0.8 mm
Oil ring: 1.0 mm
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1.Remove oil from the
crankshaft pin and connecting rod bearing.
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2.Cut the plastigage to the
same length as the width of bearing and place it on
crankshaft
pin in parallel with its axis.
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3.Install the connecting rod
cap carefully and tighten the nuts to the specified torque.
(See "Connecting rod cap nut tightening"
procedure.)
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4.Carefully remove the
connecting rod cap.
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5.Measure the width of the
plastigage at its widest part by using a scale printed on
its
package.
Standard value: 0.028 -
0.046 mm
Limit: 0.1 mm
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