Isuzu N-Series. Manual - part 601

6A1-92 4JB1/4JB1-TC/4JG2/4JH1-TC - ENGINE

ENGINE ASSEMBLY

Component

Removal

Preparation

• Disconnect battery ground cable.
• Drain coolant.

1. Transmission and Clutch Assembly

• Raise vehicle and support with suitable safely.

1) Propeller Shaft

• Reference mark the flange yoke to the parking

brake drum.

• Disconnect the propeller shaft at flange yoke.
• Put aside the propeller shaft and tie it to the

frame so that it does not interface with servicing
work.

Legend

1. Transmission and clutch assembly

9. A/C Compressor assembly (A/C model)

2. Radiator assembly

10. Power steering pump & bracket assembly (Power 

steering model)

3. Intake air duct
4. Heater hose

11. Actuator vacuum hose (Exhaust brake model)

5. Engine control cable

12. Vacuum pump hose

6. Glow plug harness

13. Front exhaust pipe

7. Fuel hose

14. Support rubber

8. Oil pressure switch harness

15. Engine assembly

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2) Parking Brake Cable

• Move the joint cover.
• Disconnect the joint bolt.
• Remove the clip then disconnect the cable from

the bracket.

3) Wiring Connector

• Disconnect the wiring connectors from the car

speed sensor, the neutral switch and the back-
up light switch.

4) Shift Cable and Select Cable

• Disconnect the shift cable and select cable on

the transmission side.

5) Clutch Slave Cylinder

• Remove the clutch pipe fixing clips and the clip

bracket (Right hand drive models only).

• Remove the slave cylinder assembly with the

flexible hose attached, and then tie it to the
frame so that it does not interface with servicing
work.

Legend

1. Reference mark

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Legend

1. Shift cable
2. Clip
3. Select cable
4. Snap pin
5. Snap pin

Legend

1. Flexible hose
2. Clutch pipe

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6) Exhaust Brake Assembly
7) Front Exhaust Pipe

8) Transmission Assembly

Notice:
The exhaust pipe bracket, the gear control bracket and
the clips are sometimes installed in the wrong position or
direction confusedly. To prevent incorrect installation of
these parts, put a correct installation mark on them.

• Support the transmission with mission jack.

Caution:
To prevent the falling of the transmission, tie it firmly to
the jack with a chain or belt.
Do not allow transmission to hang unsupported from
clutch. Damage to the clutch assembly will result.

• Remove the nuts of the transmission mounting

bracket on the crossmember side.

• Engine and transmission angles may need to

be adjusted for removal.

• Hold the rear section of the engine by the jack

or hoist.

Caution:
When lifting the engine by the jack, use wood blocks to
prevent any possible damage to the oil pan.

• Remove transmission fastening bolts.
• Pull out the transmission assembly rearward.

9) Mounting Bracket

• Raise vehicle and support with suitable safety

stands.

Caution:
Do not let clutch fluid remain on a painted surface, wash
it off immediately.

10) Pressure Plate Assembly
11) Driven Plate Assembly

• Use the pilot aligner to prevent the driven plate

assembly from falling free.
Pilot Aligner: 5-5825-3001-0

• Mark the flywheel and pressure plate lug for

alignment when installing.

• Loosen the pressure plate assembly fixing

bolts.

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2. Radiator Assembly

1) Remove the radiator hose upper and lower.
2) Remove the reservoir tank hose.
3) Remove the cushion rubbers on both sides.
4) Remove the radiator stay.

3. Intake Air Duct
4. Heater Hose
5. Engine Control Cable

• Loosen the locking nut at the bracket and discon-

nect accelerator cable from injection pump control
lever.

6. Glow Plug Harness
7. Fuel Hose

• Remove the fuel inlet hose and fuel return hose.

8. Oil Pressure Switch Harness
9. A/C Compressor Assembly

• Loosen the idler pulley lock nut.
• Loosen the adjust bolt then remove the drive belt.

• Disconnect magnetic clutch harness connector.
• Remove the A/C compressor fixing bolts and tem-

porally tighten the A/C compressor to chassis
frame side use the wire.

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