Isuzu N-Series. Manual - part 546

6F-14   Exhaust System

2. Mount the exhaust pipe.

3. Mount the nuts.

Tighten:
Nut to 67 N

⋅m (6.8 kg⋅m/49 lb⋅ft)

4. Mount the vacuum hose and the clips.

Torque Specifications

N6A6445E

N6A6446E

International Service & Parts

Tokyo,  Japan

WORKSHOP MANUAL

N-SERIES

ENGINE 4J SERIES

SECTION 6

SERVICE INFORMATION 00-1

ENGINE 4J SERIES

SECTION 00

SERVICE INFORMATION

Contents

TROUBLE SHOOTING ......................................... 00-2

Hard Starting ..................................................... 00-2
Unstable Idling................................................... 00-5
Insufficient Power .............................................. 00-6
Excessive Fuel Consumption ............................ 00-7
Excessive Oil Consumption............................... 00-7
Overheating ....................................................... 00-7
White Exhaust Smoke ....................................... 00-8
Dark Exhaust Smoke......................................... 00-8
Oil Pressure Does Not Rise............................... 00-8
Abnormal Engine Noise..................................... 00-9
Engine Cooling Trouble ................................... 00-10
Engine Electrical Part Trouble ......................... 00-11
Turbocharger ................................................... 00-16
Lubrication Chart ............................................. 00-23

MAIN DATA AND SPECIFICATIONS ................. 00-24

Main Data and Specifications .......................... 00-24
Engine Cooling ................................................ 00-26
Starting System ............................................... 00-26
Charging system.............................................. 00-27

SERVICE STANDARD........................................ 00-28

Engine Mechanical .......................................... 00-28

SERVICING ........................................................ 00-32

Model Identification.......................................... 00-32
Air Cleaner....................................................... 00-32
Lubricating System .......................................... 00-33
Fuel System..................................................... 00-33
Cooling System ............................................... 00-36
Engine Control................................................. 00-39
Compression Pressure Measure-ment............ 00-43
Quick-On Start II System (4JB1 / 4JB1-TC / 4JH1-TC 
only)................................................................. 00-44
Quick-ON Start III System (4JG2 only)............ 00-44

FIXING TORQUE................................................ 00-46

Cylinder Head Cover, Cylinder Head Rocker, Shaft 
Braker .............................................................. 00-46
Crankshaft, Bearing Cap, Connecting Rod Bearing Cap, 
Crankshaft Damper Pulley, Flywheel, Oil Pan........ 00-47
Timing Pulley Housing, Timing Pulley, Timing Gear, 
Camshaft Oil Seal Retainer ............................. 00-48
Cooling System and Lubrication System......... 00-49
Intake Manifold, Exhaust Manifold, Exhaust Pipe ... 00-50
Engine Electricals ............................................ 00-52
Engine Fuel ..................................................... 00-53
Engine Mounting Bracket ................................ 00-55

SPECIAL TOOLS................................................ 00-56

00-2 SERVICE INFORMATION

TROUBLE SHOOTING

Hard Starting

1. Starter Inoperative

2. Starter Motor Operates But Engine Does Not Turn Over

Checkpoint

Possible cause

Correction

Battery

Loose battery cable terminal poor connec-
tions due to rusting

Clean and/or retighten the battery cable
terminal

Battery discharged or weak

Recharge or replace the battery

Fan belt loose or broken

Adjust or replace the fan belt

Fusible link

Fusible link shorted

Replace the fusible link

Starter switch

Defective starter switch or starter relay

Replace the starter switch or the starter 
relay

Starter motor

Defective magnetic switch or starter relay

Repair or replace the magnetic switch

Defective starter motor

Repair or replace the starter motor

Checkpoint

Possible cause

Correction

Battery

Loose battery cable terminal

Clean and/or retighten the battery cable 
terminal

Poor connections due to rusting

Recharge or replace the battery

Battery discharged or weak

Recharge or replace the battery

Fan belt loose or broken

Adjust or replace the fan belt

Starter

Defective pinion gear

Replace the pinion gear

Defective magnetic switch

Repair or replace the magnetic switch

Brush wear, Weak brush spring

Replace the brush and/or the brush spring

Engine

Piston, crank bearing seizure, or other 
damage

Repair or replace the related parts