section 8 ISUZU TF SERIES 2004 Workshop Manual

EXHAUST SYSTEM 6F – 1


SECTION 6F
EXHAUST SYSTEM
TABLE OF CONTENTS
PAGE
Main Data and Specifications ........................................................................................... 6F - 2
General Description........................................................................................................... 6F - 3
Removal and Installation................................................................................................... 6F - 4
Inspection and Repair ....................................................................................................... 6F - 6
General Description........................................................................................................... 6F -7
EGR System Diagram ........................................................................................................ 6F 9
Inspection ........................................................................................................................... 6F-11
EGR Cooler (4JA1TC/4JH1TC Euro-III model) ................................................................. 6F-12
Turbocharger ..................................................................................................................... 6F -15
Main Data and Specifications ....................................................................................... 6F -15
General Description........................................................................................................... 6F -16
Inspection and Repair ....................................................................................................... 6F -17
Special Tools...................................................................................................................... 6F -19
IHI Service Network ........................................................................................................... 6F -20

6F – 8 EXHAUST SYSTEM
4JA1TC/4JH1TC
The EGR system engine is controlled by ECM. Refer to “Engine driveability and emissions” section for detail.








RTW46ELF001101

6F – 10 EXHAUST SYSTEM
4JA1TC/4JH1TC
The EGR system engine is controlled by ECM. Refer to “Engine driveability and
emissions” section for detail.



RTW46EMF000701

6F – 20 EXHAUST SYSTEM

IHI SERVICE NETWORK
For inquiries relating to turbochargers, please contact your ISUZU distributor or the nearest IHI Turbocharger
Service Facility.

HEADQUARTERS
ISHIKAWAJIMA HARIMA HEAVY INDUSTRIES CO., LTD.(IHI)
General Machinery Division
Tokyo Chuo Building 1-6-2 Marunouchi Chiyoda-ku
Tokyo 100-0005 JAPAN
TEL: 81-(3)-3286-2405 to 2407 (3 lines)
FAX: 81-(3)-3286-2430

CHINA
IHI BEIJING OFFICE
Room 705, China World Trade Center, No. 1 Jian Guo Men Wai Avenue
Beijing, People’s Republic of CHINA
TEL: 86-(1)-505-4997, 0408
FAX: 86-(1)-505-4350
TLX: 210343 IHIPK CN

TAIWAN
IHI TAIPEI OFFICE
Room 1202, Chia Hsin Building, No. 96 Chung Shan
North Road, Section 2, Taipei, TAIWAN
TEL: 886-(2)-542-5520, 5521, 5523
FAX: 886-(2)-542-4362
TLX: 11320 IHICO

THAILAND
IHI BANGKOK OFFICE
8th Floor, Thaniya Building, 62 Silom Road, Bangkok, THAILAND
TEL: 66-(2)-236-3490, 7356, 9099
FAX: 66-(2)-236-7340
TLX: 82375 IHICO TH

MALAYSIA
IHI KUALA LUMPUR OFFICE
Letter Box No. 52, 22nd Floor, UBN Tower,
10 Jin. P. Ramlee 50250 Kuala Lumpur, MALAYSIA
TEL: 60-(3)-232-1255, 1271
FAX: 60-(3)-232-1418
TLX: IHI KLMA 20257

INDONESIA
IHI JAKARTA OFFICE
9th Floor, Skyline Building JI. M. H. Thamrin, No. 9, Jakarta, INDONESIA
TEL: 62-(21)-32-2147, 390-2211
FAX: 62-(21)-32-3273
TLX: 44175 IHIJKT

ACCELERATOR CONTROL 6H – 1


SECTION 6H
ACCELERATOR CONTROL


TABLE OF CONTENTS
PAGE
Removal and Installation............................................................................................... 6H - 2
Removal...................................................................................................................... 6H - 6
Inspection................................................................................................................... 6H - 6
Installation.................................................................................................................. 6H - 6

WORKSHOP MANUAL

TF SERIES




ENGINE
6VE1





SECTION 6

ENGINE MECHANICAL (6VE1 3.5L) 6A-3
General Description
Engine Cleanliness And Care
An automobile engine is a combination of many
machined, honed, polished and lapped surfaces with
tolerances that are measured in the thousandths of a
millimeter (ten thousandths of an inch). Accordingly,
when any internal engine parts are serviced, care and
cleanliness are important. Throughout this section, i
t
should be understood that proper cleaning and
protection of machined surfaces and friction areas is
part of the repair procedure. This is considered
standard shop practice even if not specifically stated.


A liberal coating of engine oil should be applied to
all friction areas during assembly to protect and
lubricate the surfaces on initial operation.

Whenever valve train components, pistons, piston
rings, connecting rods, rod bearings, and
crankshaft journal bearings are removed fo
r
service, they should be retained in order.


At the time of installation, they should be installed
in the same locations and with the same mating
surfaces as when removed.

Battery cables should be disconnected before any
major work is performed on the engine. Failure to
disconnect cables may result in damage to wire
harness or other electrical parts.

The six cylinders of this engine are identified by
numbers; Right side cylinders 1, 3 and 5, Left side
cylinders 2, 4 and 6, as counted from crankshaf
t
pulley side to flywheel side.
General Information on Engine Service
The following information on engine service should be
noted carefully, as it is important in preventing damage
and contributing to reliable engine performance.

When raising or supporting the engine for any
reason, do not use a jack under the oil pan. Due to
the small clearance between the oil pan and the oil
pump strainer, jacking against the oil pan may
cause damage to the oil pick-up unit.

The 12-volt electrical system is capable o
f
damaging circuits. When performing any work
where electrical terminals could possibly be
grounded, the ground cable of the battery should
be disconnected at the battery.


Any time the intake air duct or air cleaner is
removed, the intake opening should be covered.
This will protect against accidental entrance o
f
foreign material into the cylinder which could
cause extensive damage when the engine is
started.
Cylinder Block
The cylinder block is made of aluminum die-cast casting
for 75Vtype six cylinders. It has a rear plate integrated
structure and employs a deep skirt. The cylinder liner is
cast and the liner inner diameter and crankshaft journal
diameter are classified into grades. The crankshaft is
supported by four bearings of which width is differen
t
between No.2, No.3 and No.1, No.4; the width of No.3
bearing on the body side is different in order to suppor
t
the thrust bearing. The bearing cap is made of nodular
cast iron and each bearing cap uses four bolts and two
side bolts.
Cylinder Head
The cylinder head, made of aluminum alloy casting
employs a pent-roof type combustion chamber with a
spark plug in the center. The intake and exhaust valves
are placed in V-type design. The ports are cross-flo
w
type.
Valve Train
Intake and exhaust camshaft on the both side of banks
are driven through an camshaft drive gear by timing
belt. The valves are operated by the camshaft and the
valve clearance is adjusted to select suitable thickness
shim.
Intake Manifold
The intake manifold system is composed of the
aluminum cast common chamber and intake manifold
attached with six fuel injectors.
Exhaust Manifold
The exhaust manifold is made of nodular cast iron.
Pistons and Connecting Rods
Aluminum pistons are used after selecting the grade
that meets the cylinder bore diameter. Each piston has
two compression rings and one oil ring. The piston pin
made of chromium steel is offset 1mm toward the thrus
t
side, and the thrust pressure of piston to the cylinder
wall varies gradually as the piston travels. The
connecting rods are made of forged steel. The
connecting rod bearings are graded for correct size
selection.
Crankshaft and Bearings
The crankshaft is made of Ductile cast-iron. Pins and
journals are graded for correct size selection for thei
r
bearing.
Engine Control Module (ECM)
The ECM location is on the common charmber.

ENGINE MECHANICAL (6VE1 3.5L) 6A-5
3. Trouble In Fuel System
Symptom Possible Cause Action
Starting motor turns over and spark
occurs but engine does not start. Fuel tank empty Fill
Water in fuel system Clean
Fuel filter clogged Replace filter
Fuel pipe clogged Clean or replace
Fuel pump defective Replace
Fuel pump circuit open Correct or replace
Evaporative Emission Control System
circuit clogged Correct or replace
Multiport Fuel Injection System faultyRefer to “Electronic Fuel Injection"
section

4. Engine Lacks Compression
Symptom Possible Cause Action
Engine lacks compression Spark plug loosely fitted Tighten to specified torque
Valve timing incorrect Adjust
Cylinder head gasket defective Replace gasket
Valve incorrectly seated Lap valve
Valve stem seized Replace valve and valve guide
Valve spring weakened or broken Replace
Cylinder or piston rings worn Overhaul engine
Piston ring seized Overhaul engine.

Engine Compression Test Procedure
1. Start and run the engine until the engine reaches
normal operating temperature.
2. Turn the engine off.
3. Remove all the spark plugs.
4. Remove ignition coil fuse (15A) and disable the
ignition system.
5. Remove the fuel pump relay from the relay and
fuse box.
6. Engage the starter and check that the cranking
speed is approximately 300 rpm.
7. Install cylinder compression gauge into spark plug
hole.
8. With the throttle valve opened fully, keep the
starter engaged until the compression gage needle
reaches the maximum level. Note the reading.
9. Repeat the test with each cylinder.
If the compression pressure obtained falls belo
w
the limit, engine overhaul is necessary.
Limit; 1000 kPa (145 psi)

6A-14 ENGINE MECHANICAL (6VE1 3.5L)
Troubleshooting Procedure
The slapping sound stops when spark plug on bad
cylinder is shorted out.

Symptom Possible Cause Action
Timing belt noise Timing belt tension is incorrect Replace pusher or adjust the tension
pulley or replace timing belt
Tensioner bearing defective Replace
Timing belt defective Replace
Timing pulley defective Replace
Timing belt comes in contact with
timing cover Replace timing belt and timing cover
Valve noise Valve clearance incorrect Replace adjusting shim
Valve and valve guide seized Replace valve and valve guide
Valve spring broken or weakened Replace
Valve seat off–positioned Correct
Camshaft worn out Replace
Crankshaft noise Crankshaft end play excessive (noise
occurs when clutch is engaged) Replace thrust bearing
Engine knocking Preignition due to use of spark plugs
of inadequate heat range Install Spark Plugs of adequate heat
range
Carbon deposits in combustion
chambers Clean
Fuel too low in octane rating Replace fuel
Wide Open Throttle enrichment
system failure Refer to Section 6E
Selection of transmission gear
incorrect Caution operator of incorrect gear
selection
Engine overheating Refer to “Engine Lacks Power"
Others Water pump defective Replace
Drive belt slipping Replace auto tentioner or drive belt

6A-16 ENGINE MECHANICAL (6VE1 3.5L)
Symptom Possible Cause Action
Trouble in emission control system Heated Oxygen Sensor circuit open Correct or replace
Heated Oxygen Sensor defective Replace
Signal vacuum hose loosely fitted or
defective Correct or replace
EGR Valve circuit open or shorted Correct or replace
EGR Valve defective Replace
ECT Sensor circuit open or shorted Correct or replace
Canister Purge Valve circuit open or
shorted Correct or replace
Canister Purge Valve defective Replace
ECT Sensor defective Replace
Positive Crankcase Ventilation (PCV)
valve and hose clogged Correct or replace
Evaporator system Refer to Section 6E
Trouble in ignition system ———— Refer to “Engine Lacks Power"
Trouble in cylinder head parts Carbon deposits in combustion
chamber Remove carbon
Carbon deposit on valve, valve seat
and valve guide Remove carbon