Isuzu Rodeo UE. Service manual — part 268

6E1–443

RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

ILLUSTRATION

TOOL NO.

TOOL NAME

J 28742–A

Weather Pack II

Terminal Remover

J 39021–90

Injector Switch Box

J 39021–45

Injector Test Light

J 41413

!

EVAP Pressure/Purge

Diagnostic Station

J 41416

@

Ultrasonic Leak Detector

1. J 41413 EVAP Pressure/Purge Diagnostic Station is

a multipurpose tool which is used to perform several
diagnostic procedures for enhanced emission
testing. The station will accommodate a nitrogen gas
filled cylinder which is used to pressurize the vehicle
EVAP system for a leakdown test and leak location
test when a vehicle is repaired for leakage in the
enhanced evaporative emission control system. It
also has two additional gauges (inches of mercury
and inches of water) which are used to measure both
source vacuum and EVAP canister purge vacuum to
verify correct operation and vapor flow within the
canister purge circuit.

2. J 41416 Ultrasonic Leak Detector is a

microprocessor–based device used to detect leaks in
the enhanced evaporative emission control system.
The evaporative system is pressurized to 30 inches of
water using the J 41413 EVAP Pressure/Purge
Diagnostic System. Small leaks in the EVAP system
will emit sound at a high frequency undetectable by a
human ear but detectable with the J 41416. The
technician traces along the evaporative system and
can pinpoint leaks due to corroded lines, cracked
hoses, or a damaged EVAP component. The detector
includes a high quality set of headphones to block out
surrounding shop noise and the LED sensitivity meter
allows a visual reference for locating leaks in
conjunction with the audio output heard through the
headphones. Powered by (1) nine volt battery.

ENGINE EXHAUST (X22SE 2.2L)

6F–1

RODEO

ENGINE

ENGINE EXHAUST (X22SE 2.2L)

CONTENTS

Service Precaution

6F–1

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General Description

6F–2

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Front Exhaust Pipe

6F–3

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Front Exhaust Pipe and Associated Parts

6F–3

.

Removal

6F–3

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Installation

6F–3

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Exhaust Silencer

6F–4

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Exhaust Silencer and Associated Parts

6F–4

. . .

Removal

6F–4

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Installation

6F–4

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Rear Exhaust pipe

6F–5

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Rear Exhaust pipe and Associated Parts

6F–5

.

Removal

6F–5

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Installation

6F–5

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Main Data and Specifications

6F–6

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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, REFER 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, or 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.

6F–2

ENGINE EXHAUST (X22SE 2.2L)

General Description

150RX004

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.

ENGINE EXHAUST (X22SE 2.2L)

6F–3

Front Exhaust Pipe

Front Exhaust Pipe and Associated Parts

150RX001

Legend

(1) Front Exhaust Pipe Fixing Nuts
(2) O2 Sensor
(3) Front Exhaust Pipe with Three Way Catalytic

Converter

(4) Front Exhaust Pipe Mounting Rubber
(5) O2 Sensor
(6) Front Exhaust Pipe Fixing Bolt
(7) Front Exhaust Pipe Fixing Bolt (Clamp)
(8) Front Exhaust Pipe Mounting Bracket

Removal

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

stands.

3. Disconnect O2 sensor harness connector and

remove front side O2 sensor (2),(5).

4. Remove front exhaust pipe fixing bolts (6),(7).
5. Remove front exhaust pipe fixing four stud nuts from

exhaust manifold (1).

6. Remove front exhaust pipe (3).

Installation

1. Install front exhaust pipe (3) and tighten four stud nuts

(1) and two bolts (6) to the specified torque:

Torque:
Stud Nuts : 28 N·m (21 lb ft)
Bolts (6) : 43 N·m (32 lb ft)
Bolts (7) : 23 N·m (17 lb ft)

2. Tighten front side O2 sensor and reconnect O2

sensor harness connector.

Torque : 55 N·m (41 lb ft)