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 82E-5 – 98E-5 SERIES 4-39 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