Isuzu N-Series. Manual — part 357
6A3-80 ENGINE (4HF1 / 4HF1-2 / 4HE1-TC / 4HG1 / 4HG1-T)
2) Tighten the oil pan nuts and bolts to the speci-
fied torque in the numerical order as shown in
the illustration.
marks are located on nut positions.
Tighten:
Oil Pan nuts and bolts to 11 N
⋅m (1.1 kg⋅m/8 lb⋅ft)
Except 4HE1-TC
• Tighten bolts (1), (2), (3), and (4) in numerical
order.
• Tighten the remaining bolts (numerical order is
not requred).
Tighten:
Oil pan nuts and bolts to 11 N
⋅m (1.1 kg⋅m/8 lb⋅ft)
For 4HE1-TC
2. Spacer Rubber
Tighten:
Spacer rubber bolts to 76 N
⋅m (7.7 kg⋅m/56 lb⋅ft)
• Tighten the spacer rubber together with the
stiffener.
Tighten:
Spacer rubber bolts to
• Cylinder body RH side: 48 N
⋅m (4.9 kg⋅m/35 lb⋅ft)
• Cylinder body LH side: 128 N
⋅m (12.9 kg⋅m/93 lb⋅ft)
• Flywheel housing side: 76 N
⋅m (7.7 kg⋅m/56 lb⋅ft)
Legend
1. Gasket
2. Oil pan
3. Rubber assembly
N6A0552E
N6A0553E
N6A0554E
ENGINE (4HF1 / 4HF1-2 / 4HE1-TC / 4HG1 / 4HG1-T) 6A3-81
• 4HE1-TC engines use a larger rubber spacer
than other engines.
Tighten:
Space rubber bolts to 76 N
⋅m (7.7 kg⋅m/56 lb⋅ft)
• Install the rubber spacer to the bracket from the
outside of the spacer. Tighten the stiffener to-
gether with the rubber spacer.
For 4HE1-TC
Legend
1. Right side
2. Left side
Legend
1. Flywheel housing
2. Stiffener
3. Space rubber
N6A0555E
N6A0556E
6A3-82 ENGINE (4HF1 / 4HF1-2 / 4HE1-TC / 4HG1 / 4HG1-T)
OIL PUMP ASSEMBLY
Component
Legend
1. Engine assembly
15. Engine control wire
2. Nozzle cover
16. Engine control lever assembly
3. Cylinder head cover
17. Oil pipe
4. Head cover gasket
18. Injection pump assembly
5. Rocker arm shaft assembly
19. Flywheel
6. Valve cap
20. Rear oil seal
7. Camshaft bearing cap
21. Slinger
8. Camshaft bearing upper
22. Spacer rubber
9. Camshaft assembly
23. Oil pan
10. Camshaft bearing lower
24. Power steering pump idle gear cover
11. Cylinder head assembly
25. Power steering pump idle gear
12. Cylinder head gasket
26. Flywheel housing
13. Clutch pressure plate assembly
27. Idle gear A
14. Driven plate
28. Oil pump assembly
N6A1637E
ENGINE (4HF1 / 4HF1-2 / 4HE1-TC / 4HG1 / 4HG1-T) 6A3-83
Removal
Preparation
• Disconnect battery ground cable.
• Tilt the cab.
• Drain coolant and engine oil
1. Engine Assembly
Above works refer to “ENGINE ASSEMBLY” sec-
tion in this manual.
2. Nozzle Cover
3. Cylinder Head Cover
4. Head Cover Gasket
5. Rocker Arm Shaft Assembly
6. Valve Cap
7. Camshaft Bearing Cap
8. Camshaft Bearing Upper
9. Camshaft Assembly
10. Camshaft Bearing Lower
Above works refer to “ROCKER ARM SHAFT AS-
SEMBLY AND CAMSHAFT ASSEMBLY” section
in this manual.
11. Cylinder Head Assembly
Above works refer to “CYLINDER HEAD” section
in this manual.
12. Cylinder Head Gasket
Caution:
Do not reuse the cylinder head gasket.
13. Clutch Pressure Plate Assembly
14. Driven Plate
Above works refer to “TIMING GEAR REPLACE-
MENT” section in this manual.
15. Engine Control Wire
16. Engine Control Lever Assembly
17. Oil Pipe
18. Injection Pump Assembly
1) Remove the injection pump bracket bolts and
the injection pump rear bracket bolts.
2) Then remove the injection pump assembly.
19. Flywheel
20. Crankshaft Rear Oil Seal
21. Crankshaft Rear Slinger
Above works refer to “CRANKSHAFT REAR OIL
SEAL” section in this manual.
22. Spacer Rubber
Remove the stiffener before removing the spacer
rubber.
23. Oil Pan
24. Power Steering Pump Idle Gear Cover
25. Power Steering Pump Idle Gear
26. Flywheel Housing
N6A0422E
N6A0425E
N6A0426E
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