4. DISASSEMBLY, INSPECTION AND REASSEMBLY OF ENGINES (2) Valve guide Mainly check damage and wear on the inside wall. Apply the service part No. when replacing a part. Valve stem clearance mm 4-20 82E-5 – 98E-5 SERIES Model Service part No. 3D82AE (2-valve) Suction YM124060-11800 Exhaust YM119802-11810 4D84E (S)3D84E 3D88E, 4D88E (2-valve) Suction YM120130-11860 Exhaust YM129150-11810 S4D84E (4-valve) Suc./ Exh. YM119717-11800 4D94LE (S)4D98E (4-valve) Suc./ Exh. YM129907-11800 Model Part name Place Standard Limit 3D82AE (2-valve head) Intake valve Guide I.D. 7.000 – 7.015 7.08 Stem O.D. 6.945 – 6.960 6.90 Clearance 0.040 – 0.070 0.18 Exhaust valve Guide I.D. 7.000 – 7.015 7.08 Stem O.D.
6.940 – 6.955 6.90 Clearance 0.045 – 0.075 0.18 4D84E (S)3D84E 3D88E 4D88E (2-valve head) Intake valve Guide I.D. 8.010 – 8.025 8.10 Stem O.D. 7.955 – 7.975 7.90 Clearance 0.035 – 0.070 0.18 Exhaust valve Guide I.D. 8.015 – 8.030 8.10 Stem O.D. 7.955 – 7.970 7.90 Clearance 0.045 – 0.075 0.18 S4D84E (4-valve head) Intake valve Guide I.D. 6.000 – 6.015 6.08 Stem O.D. 5.960 – 5.975 5.90 Clearance 0.025 – 0.055 0.15 Exhaust valve Guide I.D. 6.000 – 6.015 6.08 Stem O.D. 5.945 – 5.960 5.90 Clearance 0.040 – 0.070 0.17 4D94LE (S)4D98E (4-valve head) Intake valve Guide I.D. 7.000 – 7.015 7.08 Stem O.D. 6.945 – 6.960 6.90 Clearance 0.040 – 0.070 0.17 Exhaust valve Guide I.D.
7.000 – 7.015 7.08 Stem O.D. 6.940 – 6.955 6.90 Clearance 0.045 – 0.075 0.17