82E-5 – 98E-5 SERIES 4-39
4. DISASSEMBLY, INSPECTION AND REASSEMBLY OF ENGINES
(c) If the limit is exceeded or any surface defect
is found, repair by boring and honing. Use
an oversized piston (and new piston rings)
as required.
Oversized piston (0.25 mm, with piston rings)
Piston ring ass’y for oversized (0.25mm)
Cylinder dimension after boring and honing
Model Part No. Standard (mm)
3D82AE YM719802-22900 82.250
(S)3D84E, 4D84E YM129004-22900 84.250
S4D84E YM129508-22900 84.250
3D88E, 4D88E YM129005-22900 88.250
4D94LE YM729906-22900 94.250
4D98E YM129902-22700 98.250
Model Piston ring part No.
3D82AE YM7719802-22950
(S)3D84E, 4D84E YM129004-22950
S4D84E YM129004-22950
3D88E, 4D88E YM129005-22950
4D94LE YM729906-22950
4D98E YM729907-22950
Model
Cylinder dimension
(mm)
Honing angle
(deg.)
Surface
roughness
Roundness/
Cylindricity
(mm)
3D82AE 82.250 – 82.280
30 – 40
Rmax
1.0 – 3.5 S
0.01 or less
(S)3D84E, (S)4D84E 84.250 – 84.280
3D88E, 4D88E 88.250 – 88.280
4D94LE 94.250 – 94.280
(S)4D98E 98.250 – 98.280
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