Isuzu Trooper (1998-2002 year). Manual - part 541

6E–534

6VE1 3.5 ENGINE DRIVEABILITY AND EMISSIONS

Special Tools

ILLUSTRATION

TOOL NO.

TOOL NAME

5-8840-0285-0

(J 39200)

High Impedance

Multimeter (Digital

Voltmeter – DVM)

(1) PCMCIA Card

(2) RS232 Loop Back

Connector

(3) SAE 16/19 Adapter

(4) DLC Cable

(5) TECH–2

5-8840-0607-0

(J 34142-B)

Unpowered Test Light

5-8840-0385-0

(J 35616-A/BT-8637)

Connector Test Adapter

Kit

5-8840-0383-0

(J 26792/BT-7220-1)

Spark Tester

5-8840-0279-0

(J 23738-A)

Vacuum Pump with

Gauge or common tool

ILLUSTRATION

TOOL NO.

TOOL NAME

BT-8515

Exhaust Back Pressure

Tester or common tool

5-8840-2640-0

(J 39194-B)

Heated Oxygen Sensor

Wrench

5-8840-0632-0

(J 35689-A)

Terminal Remover

5-8840-0388-0

(J 28742-A)

Weather Pack II

Terminal Remover

5-8840-2635-0

(J 39021-90)

Injector Switch Box

5-8840-2636-0

(J 39021-65)

Injector Test Light

6F–1

ENGINE EXHAUST

ENGINE

ENGINE EXHAUST

CONTENTS

General Description

6F–2

. . . . . . . . . . . . . . . . . . . . . 

Front Exhaust Pipe

6F–3

. . . . . . . . . . . . . . . . . . . . . . 

Front Exhaust Pipe and Associated Parts

6F–3

. 

Removal

6F–3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Installation

6F–3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Three Way Catalytic Converter LH

6F–4

. . . . . . . . . 

Removal

6F–4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Installation

6F–4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Three Way Catalytic Converter RH

6F–5

. . . . . . . . 

Removal

6F–5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Installation

6F–5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Exhaust Silencer

6F–6

. . . . . . . . . . . . . . . . . . . . . . . . 

Exhaust Silencer and Associated Parts

6F–6

. . . 

Removal

6F–6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Installation

6F–7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Rear Exhaust pipe

6F–8

. . . . . . . . . . . . . . . . . . . . . . . 

Rear Exhaust pipe and Associated Parts

6F–8

. 

Removal

6F–8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Installation

6F–8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Main Data and Specifications

6F–9

. . . . . . . . . . . . . 

SECTION

6F–2

ENGINE EXHAUST

General Description

150R200025

When inspecting or replacing exhaust system
components, make sure there is adequate clearance
from all points on the underbody to prevent overheating
the floor pan and possible damage to the passenger
compartment insulation and trim materials.

Check complete exhaust system and nearby body areas
and rear compartment lid for broken, damaged, missing
or mispositioned parts, open seams, holes, loose
connections or other deterioration which could permit
exhaust fumes to seep into the rear compartment or
passenger compartment. Dust or water in the rear
compartment may be an indication of a problem in one of
these areas. Any faulty areas should be corrected
immediately.

Hangers

Various types of hangers are used to support exhaust
system(s). These include conventional rubber straps,
rubber rings, and rubber blocks.

The installation of exhaust system supports is very
important, as improperly installed supports can cause
annoying vibrations which can be difficult to diagnose.

Three Way Catalytic Converter

The three way catalytic converter is an emission control
device added to the exhaust system to reduce pollutants
from the exhaust gas stream.

CAUTION: The catalytic converter requires the use
of unleaded fuel only.
Periodic maintenance of the exhaust system is not
required. If the vehicle is raised for other service, it is
advisable to check the condition of the complete exhaust
system.
A dual bed monolith catalytic converter is used in
combination with three way catalytic converter.
Catalytic Types:
Three way (Reduction/Oxidation) catalyst
The catalyst coating on the three way (reduction)
converter contains platinum and rhodium which lowers
the levels of nitrous oxide (NOx) as well as hydrocarbons
(HC) and carbon monoxide (Co).

Gasket

The gasket must be replaced whenever a new exhaust
pipe, muffler or catalytic converter is installed.

6F–3

ENGINE EXHAUST

Front Exhaust Pipe

Front Exhaust Pipe and Associated Parts

150R200005

Legend

(1) Gasket
(2) Front Exhaust Pipe RH Fixing Nuts
(3) O

2

 Sensor Harness Connector

(4) Front Exhaust Pipe RH Fixing Bolts and Nuts
(5) Gasket
(6) Front Exhaust Pipe Fixing Bolts and Nuts
(7) Gasket

(8) O

2

 Sensor Harness Connector

(9) Front Exhaust Pipe LH

(10) O

2

 Sensor Harness Connector

(11) Front Exhaust Pipe LH Fixing Nuts

(12) O

2

 Sensor Harness Connector

(13) Gasket
(14) Front Exhaust Pipe RH

Removal

1. Disconnect battery ground cable.
2. Raise the vehicle and support with suitable safety

stands.

3. Disconnect O

2

 sensor harness connector

(3)(8)(10)(12).

4. Remove front exhaust pipe fixing bolts and nuts

(4)(6).

5. Remove front exhaust pipe fixing three stud nuts (2)

(11) from exhaust manifold.

6. Remove front exhaust pipe (9)(14).

Installation

1. Install front exhaust pipe (9)(14) and tighten three

stud nuts (2)(11) and two nuts (4)(6) to the specified
torque.

Torque
Stud Nuts : 67 N·m (6.8 kg·m/49 lb ft)
Nuts(4) : 57 N·m (5.8 kg·m/42 lb ft)
Nuts(6) : 43 N·m (4.4 kg·m/32 lb ft)

2. Reconnect O

2

 sensor harness connector

(3)(8)(10)(12).