Isuzu N-Series. Manual - part 590

6A1-48 4JB1/4JB1-TC/4JG2/4JH1-TC - ENGINE

Tighten:

• AC generator fixing bolt to 40 N

⋅m (4.1 kg⋅m / 30 lb⋅ft)

• Adjust plate fixing bolt to 19 N

⋅m (1.9kg⋅m / 1.4 lb⋅ft)

• Adjust plate lock bolt to 19 N

⋅m (1.9 kg⋅m / 1.4 lb⋅ft)

4JG2

19. Heater Core

• Connect the heater hose them tighten the clip se-

curely.

20. Radiator Hose Upper

• Connect the radiator hose them tighten clip secure-

ly.

• Pour coolant.
• Connect the battery ground cable.
• Start the engine and check coolant leakage.

Legend

1. A/C compressor
2. Idle pulley
3. Adjust plate
4. Adjust bolt
5. P/S pump pulley
6. Fan pulley
7. Idle pulley
8. Adjust pulley
9. Crank pulley

10. ACG bolt

11. AC generator

N6A3296E

N6A3297E

Legend

1. A/C compressor drive belt
2. P/S pump drive belt
3. AC generator fan pulley

4JB1/4JB1-TC/4JG2/4JH1-TC - ENGINE 6A1-49

OIL PAN

Component

Removal

Preparation

• Disconnect battery ground cable.
• Lift up car.
• Drain engine oil.

Notice:
Install drain plug with new gasket.

Tighten:

• 44 N

⋅m (4.5 kg⋅m / 33 lb⋅ft)

1. Vacuum Pump Oil Hose

• Remove oil hose (1) from oil pan.

Legend

A. Independent suspension (4 

× 2)

2. Engine mount bolts

B. Rigid suspension (4 

× 2)

3. Stiffener and space rubber

1. Vacuum pump oil hose

4. Oil pan assembly

N6A3298E

6A1-50 4JB1/4JB1-TC/4JG2/4JH1-TC - ENGINE

2. Engine Mount Bolts

• Remove the engine mount bolts right & left side.

3. Stiffener & Space Rubber

• Remove the exhaust pipe bracket.
• Remove the stiffener from of the oil pan left & right

side.

• Take out space rubber.

4. Oil Pan Assembly

• Raising the engine about 50mm.
• Remove the oil pan from cylinder block.

Installation

1. Oil Pan Assembly

• Apply the recommended liquid gasket or its equiv-

alent to the No.5 bearing cap arches, the grooves,
and the timing gear case arches at the positions
shown in the illustration.

• Fit the gasket rear lipped portion into the No.5

groove.

N6A3299E

N6A3300E

N6A3301E

N6A3302E

4JB1/4JB1-TC/4JG2/4JH1-TC - ENGINE 6A1-51

• Be absolutely sure that the lipped portion in fitted

snugly in to the groove.

• Install the oil pan to the cylinder body.
• Tighten the oil pan bolts to the specified torque.

Tighten:

• Oil pan bolt to 19 N

⋅m (1.9 kg⋅m / 14 lb⋅ft)

2. Stiffener and Space Rubber

• Install the space rubber.
• Install the stiffener left side and right side tighten

bolt to the specified torque.

Tighten:

• Engine body side to 37 N

⋅m (3.8 kg⋅m / 27 lb⋅ft)

• Clutch housing side to 78 N

⋅m (8.0 kg⋅m / 58 lb⋅ft)

• Install exhaust pipe bracket.

3. Engine Mount Bolts

• Install the mount bolts and tighten to the specified

torque.

Tighten:

• Mount bolt to 40 N

⋅m (4.1 kg⋅m / 30 lb⋅ft)

• Install the oil hose to oil pan.

4. Vacuum Pump Oil Hose

• Pour engine oil
• Connect battery ground cable.
• Start the engine and check coolant leakage.

N6A3126E