Isuzu N-Series. Manual — part 498
Engine Mechanical (4HK1-TC) 6A-97
• Use a scale or other equipment to inspect
whether the flexure of the belt when it was
pushed by hand with pressure of 98 N (22 lb) is
within the designated range.
• Tighten the locknut of the tension pulley with
the designated torque after adjusting the
tension of the belt.
Tighten:
Lock nut to 27 N
⋅m (2.8 kg⋅m/20 lb⋅ft)
Legend
1. Tension Pulley Lock Nut
2. Tension Pulley Adjusting Bolt
28. Install the intake pipe.
• Install the bolt and clip band, tighten the bolt
with the designated torque.
Tighten:
Bolt to 10 N
⋅m (1.0 kg⋅m/87 lb⋅in)
•
• Install the fan guide bracket.
29. Install the EGR valve and EGR cooler.
For details of installation, refer to “EGR Valve and
EGR Cooler” in Section 6F.
Legend
1. EGR Adapter
2. Water Return Pipe
3. EGR Cooler
4. EGR Pipe
5. Water Feed Pipe
30. Install the oil level gauge and guide tube.
31. Install the exhaust pipe.
• Install the front exhaust pipe and tighten with
the designated torque.
Tighten:
Nuts to
Exhaust manifold side: 67 N
⋅m (6.8 kg⋅m/49 lb⋅ft)
Exhaust brake side: 17 N
⋅m (1.7 kg⋅m/13 lb⋅ft)
32. Install the engine harness.
33. Replenish the coolant.
A/C belt flexure
mm (in)
New belt
16 (0.63) – 20 (0.79)
Reused belt
18 (0.71) – 22 (0.87)
N6A6122E
N6A6121E
N6A6025E
6A-98 Engine Mechanical (4HK1-TC)
Torque Specifications
Special Tool
N6A6184E
Illustration
Tool Number /
Description / Remarks
5-8840-0019-0 (J-23907)
Sliding Hammer
5-8840-2628-0 (J-43272)
Valve Guide Replacer
584000190
5-8840-2833-0
(EN-47685)
Valve Stem Seal Installer
5-8840-0266-0 (J-45059)
Angle Gauge
Illustration
Tool Number /
Description / Remarks
EN47685
Engine Mechanical (4HK1-TC) 6A-99
5-8840-2624-0 (J-43266)
Nozzle Sleeve Installer
5-8840-2626-0 (J-43268)
Bridge Guide Installer
5-8840-2627-0 (J-43269)
Oil Seal Installer
5-8840-2623-0 (J-43265)
Nozzle Sleeve Remover
5-8840-2826-0
(EN-46720)
Fuel Injector Remover
5-8840-2621-0 (J-43263)
Valve Spring Replacer
Illustration
Tool Number /
Description / Remarks
EN46720
5-8840-2808-0
(EN-46721)
Pivot Assembly
5-8840-2222-0
(EN-47690)
Sealing Cup Installer
Illustration
Tool Number /
Description / Remarks
6A-100 Engine Mechanical (4HK1-TC)
Piston and Connecting Rod
Component
Legend
1. Snap Ring
2. Piston
3. Bearing
4. Connecting Rod Cap
5. Connecting Rod
6. Piston Pin
7. Piston Ring
Removal
1. Remove the oil pan.
Refer to “Oil Pan”.
2. Remove the cylinder head cover.
Refer to “Cylinder Head Cover”.
3. Remove the rocker arm shaft assembly.
Refer to “Rocker Arm Shaft Assembly”.
4. Remove the camshaft assembly.
Refer to “Camshaft Assembly”.
5. Remove the cylinder head.
Refer to “Cylinder Head”.
6. Remove the connecting rod cap.
1
2
3
4
5
6
1
7
N6A6649E
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