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
. . . . . . . . . . . . .
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).
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