4. DISASSEMBLY, INSPECTION AND REASSEMBLY OF ENGINES Dimension R and finishing precision of crank- shaft journal and pin As for grinding processing of journal and pin, machine it by using the grinding wheel of the dimension R of below table. Surface finishing precision standard on journal and pin: Ry=0.8S super polishing Surface finishing precision standard on the thrust side of crankshaft arm: 1.6 mm [NOTICE] 1) If the oil clearance is excessive though the thickness of the journal and crankpin metals are normal or if partial uneven wear is observed, re-grind the crankshaft and use an oversized metals.
2) If rust or surface roughening exists on the rear side of the metals, coat it with blue or minimum. Then assemble the crankpin metal to the connecting rod, and tighten the rod bolt to the specified torque to check the metal for contact. If the contact surface occupies 75% or more, the metal is normal. If the contact surface is insufficient, the metal interference is insufficient. Replace the metal with a new one. (3) Thrust metal inspection (a) Inspect any damage or wear. (b) Measure side gap and thrust metal thickness Side gap and thrust metal thickness mm If the side gap is exceeded, use an oversized thrust metal.
(Refer to point 4 of 4.4.4.) Oversized metal (0.25mm) 82E-5 – 98E-5 SERIES 4-43 Model Finishing precision stan- dard of dimension R 3D82AE – 4D88E 3.5+0.3 +0 4D94LE, (S)4D98E 4.0+0.3 +0 Model Side gap Thrust metal thickness Standard Limit Standard Limit 3D82AE – 4D88E 0.14 – 0.22 0.28 1.930 – 1.980 1.850 4D94LE, (S)4D98E 0.13 – 0.23 1.930 – 1.980 1.850 Model Part No. (Up-down combination) 3D82AE YM119810-02940 (S)3D84E – 4D88E YM129150-02940 4D94LE, (S)4D98E YM129900-02940