Page 2377 of 4264
3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-381
Bend the ground electrode to adjust the spark plug
gap.
011RS011
Installation Procedure
1. Spark plugs
Tighten spark plugs to the specified torque.
Torque: 18 N
m (1.8 kg
m/13 lb ft)
Page 2378 of 4264
6E-382 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Special Tools
ILLUSTRATION PART NO.
PART NAME
ILLUSTRATION PART NO.
PART NAME
5–8840–0285–0
(J 39200)
High Impedance
Multimeter (Digital
Voltmeter – DVM) Breaker Box
(1) PCMCIA Card
(2) RS232 Loop Back
Connector
(3) SAE 16/19 Adapter
(4) DLC Cable
(5) TECH 2 5–8840–2618–0
Fuel Injector Tester
5–8840–0385–0
(J 35616-A/BT-8637)
Connector Test Adapter
Kit
5–8840–0378–0
(J 34730-E)
Port Fuel Injection
Diagnostic Kit
5–8840–2635–0
(J 39021-90)
Injector Switch Box
5–8840–0383–0
(J 26792/BT-7220-1)
Spark Tester
Page 2379 of 4264

ENGINE EXHAUST (6VE1 3.5L) 6F-1
ENGINE
ENGINE EXHAUST (6VE1 3.5L)
CONTENTS
Service Precaution................................................. 6F-1
General Description............................................... 6F-2
Three Way Catalytic Converter and Center
Exhaust Pipe.......................................................... 6F-3
Three Way Catalytic Converter and Center
Exhaust Pipe and Associated Parts................ 6F-3
Removal............................................................... 6F-3
Installation............................................................. 6F-3
Exhaust Silencer and Rear Exhaust Pipe........... 6F-4
Exhaust Silencer and Rear Exhaust Pipe and
Associated Parts................................................. 6F-4
Removal................................................................ 6F-4
Installation............................................................. 6F-4
Main Data and Specifications................................ 6F-5
Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE
SRS COMPONENTS OR THE SRS WIRING, REFE
R
TO THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN
POSSIBLE AIR BAG DEPLOYMENT, PERSONAL
INJURY, OR OTHERWISE UNNEEDED SRS SYSTEM
REPAIRS.
CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, o
r
other corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener.
When you install fasteners, use the correct
tightening sequence and specifications. Following
these instructions can help you avoid damage to
parts and systems.
Page 2380 of 4264

6F-2 ENGINE EXHAUST (6VE1 3.5L)
General Description
RTW46FLF000101
Legend (3) Three Way Catalytic Converter
(1) Front Exhaust Pipe LH (4) Center Exhaust Pipe
(2) Front Exhaust Pipe RH (5) Exhaust Silencer & Tail Pipe
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 passenge
r
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 rea
r
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.
Page 2381 of 4264
ENGINE EXHAUST (6VE1 3.5L) 6F-3
CAUTION: The catalytic converter requires the use
of unleaded fuel only.
Periodic maintenance of the exhaust system is no
t
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 Converter 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.
Page 2382 of 4264

6F-4 ENGINE EXHAUST (6VE1 3.5L)
Three Way Catalytic Converter and Center Exhaust Pipe
Three Way Catalytic Converter and Center Exhaust Pipe and Associated Parts
RTW46FMF000201
Legend (4) Three Way Catalytic Converter LH
(1) Front Exhaust Pipe Fixing Nuts (5) Mounting Rubber
(2) O
2 Sensor (6) Exhaust Pipe Fixing Nuts
(3) Three Way Catalytic Converter RH (7) Center Exhaust Pipe
Removal
1. Disconnect battery ground cable.
2. Lift up the vehicle and support with suitable safety
stands.
3. Disconnect O
2 sensor harness connectors (2).
4. Remove the center exhaust pipe fixing nuts (6) and
the exhaust silencer fixing bolts, then remove the
center exhaust pipe and the mounting rubber.
5. Remove the front exhaust pipe fixing nuts (1) and
the mounting rubber, then remove the three way
catalytic converter (3) (4).
Installation
1. Install the three way catalytic converter (3) (4) and
the mounting rubber, and tighten the fixing nuts (1)
to the specified torque.
Torque : 67 N
m (6.8 kg
m/49 lb ft)
2. Install the center exhaust pipe and the mounting
rubbler, and tighten the fixing nuts (6) and bolts to
the specified torque.
Torque : 43 N
m (4.4 kg
m/32 lb ft)
3. Connect the O
2 sensor connectors (2).
Page 2383 of 4264
ENGINE EXHAUST (6VE1 3.5L) 6F-5
Exhaust Silencer and Rear Exhaust Pipe
Exhaust Silencer & Tail Pipe and Associated Parts
RTW46FMF000301
Legend (4) Exhaust Silencer Mounting Rubber
(1) Center Exhaust Pipe (5) Exhaust Silencer & Tail Pipe
(2) Exhaust Pipe Fixing Bolts (6) Rear Exhaust Pipe Mounting Rubber
(3) Exhaust Pipe Fixing Nuts
Removal
1. Disconnect battery ground cable.
2. Lift up the vehicle and support with suitable safety
stands.
3. Remove the exhaust pipe fixing nuts (3) and bolts
(2).
4. Remove the silencer and rear exhaust pipe
mounting rubber (4)(6), then remove the exhaus
t
silencer (5) and rear exhaust pipe (6).
Installation
1. Install the exhaust silencer and pipe (5), then install
the exhaust silencer and rear exhaust pipe
mounting rubber (4)(6).
2. Tighten the exhaust pipe fixing nuts (3) and exhaus
t
pipe fixing bolts (2).
Torque: 43 N
m (4.4 kg
m/32 lb ft)
Page 2384 of 4264
6F-6 ENGINE EXHAUST (6VE1 3.5L)
Main Data and Specifications
Torque Specifications
N
m (kg
m/lb ft)
RTW36FLF000301