MECHANICAL
01-10–33
01-10
3. Calculate the cylinder-to-piston clearance from the cylinder bore diameter and the piston outer diameter.
•
If the clearance exceeds the maximum specification, replace the piston or cylinder block.
Standard clearance between piston and cylinder
0.025—0.045 mm {0.0010—0.0017 in}
Maximum clearance between piston and cylinder
0.066 mm {0.0026 in}
4. Measure the piston-to-ring groove clearance
along the perimeter using a feeler gauge. For the
O-ring, measure the clearance with the O-ring
assembled to the piston.
•
If the clearance exceeds the maximum
specification, replace the piston or piston ring.
Standard clearance between piston ring and
ring groove
Top: 0.04—0.08 mm {0.002—0.003 in}
Second: 0.03—0.07 mm {0.0012—0.0027 in}
Oil: 0.04—0.12 mm {0.002—0.004 in}
Maximum clearance between piston ring and
ring groove
Top: 0.12 mm {0.0047 in}
Second: 0.10 mm {0.0039 in}
Oil: 0.17 mm {0.0067 in}
End Of Sie
PISTON RING INSPECTION
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1. Using the piston, press the piston ring parallel into
the cylinder to
43.9 mm {1.73 in}
from the upper
end of the cylinder block.
2. Measure the piston ring end gap using a feeler
gauge.
•
If it exceeds the maximum specification,
replace the piston ring.
Standard piston ring end gap
Top: 0.13—0.18 mm {0.0052—0.0070 in}
Second: 0.18—0.28 mm {0.008—0.011 in}
Oil (Rail): 0.10—0.35 mm {0.004—0.013 in}
Maximum piston ring end gap
Top: 0.35 mm {0.014 in}
Second: 0.45 mm {0.018 in}
Oil (Rail): 0.52 mm {0.020 in}
End Of Sie
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PISTON RING
PISTON
CYLINDER BLOCK
43.9 mm {1.73 in}
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PISTON RING
bpe2ue00000095
1A36-1U-12L.book 33 ページ ２０１２年１２月１０日 月曜日 午前９時２５分
