cooling ISUZU TF SERIES 2004 Workshop Manual

ENGINE DRIVEABILITY AND EMISSIONS 6E–55
Low or high spark plug installation torque or improper
seating can result in the spark plug running too hot and
can cause excessive center electrode wear. The plug
and the cylinder head seats must be in good contact for
proper heat transfer and spark plug cooling. Dirty or
damaged threads in the head or on the spark plug can
keep it from seating even though the proper torque is
applied. Once spark plugs are properly seated, tighten
them to the torque shown in the Specifications Table.
Low torque may result in poor contact of the seats due
to a loose spark plug. Over tightening may cause the
spark plug shell to be stretched and will result in poor
contact between the seats. In ex treme cases, ex haust
blow-by and damage beyond simple gap wear may
occur.
Cracked or broken insulators may be the result of
improper installation, damage during spark plug re-
gapping, or heat shock to the insulator material. Upper
insulators can be broken when a poorly fitting tool is
used during installation or removal, when the spark plug
is hit from the outside, or is dropped on a hard surface.
Cracks in the upper insulator may be inside the shell
and not visible. Also, the breakage may not cause
problems until oil or moisture penetrates the crack later.A broken or cracked lower insulator tip (around the
center electrode) may result from damage during re-
gapping or from “heat shock” (spark plug suddenly
operating too hot).
Damage during re-gapping can happen if the gapping
tool is pushed against the center electrode or the
insulator around it, causing the insulator to crack.
When re-gapping a spark plug, make the adjustment
by bending only the ground side terminal, keeping the
tool clear of other parts.
“Heat shock” breakage in the lower insulator tip
generally occurs during several engine operating
conditions (high speeds or heavy loading) and may
be caused by over-advanced timing or low grade
fuels. Heat shock refers to a rapid increase in the tip
temperature that causes the insulator material to
crack.
Spark plugs with less than the recommended amount of
service can sometimes be cleaned and re-gapped, then

6E–256 ENGINE DRIVEABILITY AND EMISSIONS
POOR FUEL ECONOMY SYMPTOM
DEFINITIONS: Fuel economy, as measured by an actual road test, is noticeably lower than expected. Also, economy
is noticeably lower than it was on this vehicle at one time, as previously shown by an actual road test.
Step Action Value(s) Yes No
1Was the “On-Board Diagnostic (OBD) System Check”
performed?—Go to Step 2Go to OBD
System Check
2 1. Perform a bulletin search.
2. If a bulletin that addresses the symptom is found,
correct the condition as instructed in the bulletin.
Was a bulletin found that addresses the symptom?—Verify repair Go to Step 3
3 Was a visual/physical check performed?
—Go to Step 4Go to Visual /
physical Check.
4 Check owner’s driving habits.
Is the A/C On full time (defroster mode On)?
Are tires at the correct pressure?
Are ex cessively heavy loads being carried?
Is acceleration too much, too often?—Go to Step 5Go to Step 6
5 Review the items in Step 4 with the customer and
advise as necessary.
Is the action complete?—System OK—
6 Visually/physically check: Vacuum hoses for splits,
kinks, and improper connections and routing as
shown on the “Emission Control System Schematics”.
Was a problem found?—Verify repair Go to Step 7
7 Check for low engine coolant level.
Was a problem found? —Verify repair Go to Step 8
8 Check for incorrect or faulty engine thermostat. Refer
to Engine Cooling.
Was a problem found?—Verify repair Go to Step 9
9 Remove and check the air filter element for dirt or for
restrictions.
Was a problem found?—Verify repair Go to Step 10
10 1. Using a Tech 2, display the MAP sensor value in
comparison with atmosphere temperature.
2. Check for a faulty, plugged, or incorrectly installed
MAP sensor.
Was the problem found?—Verify repair Go to Step 11
11 1. Using a Tech 2, display the ECT sensor and IAT
sensor value and warm up condition compared
with the typical data.
2. Check the specified value or wire.
Was the problem found?—Verify repair Go to Step 12
12 Check the knock sensor wire, shield wire, or
installation condition.
Was a problem found?—Verify repair Go to Step 13
13 Check the fuel pressure. Refer to 6E-108 page
Fuel
System Diagnosis
.
Was a problem found?—Verify repair Go to Step 14

6E–258 ENGINE DRIVEABILITY AND EMISSIONS
EXCESSIVE EXHAUST EMISSIONS OR ODORS SYMPTOM
DEFINITIONS: Vehicle fails an emission test. There is ex cessive “rotten egg” smell. (Ex cessive odors do not
necessarily indicate ex cessive emissions.)
Step Action Value(s) Yes No
1Was the “On-Board Diagnostic (OBD) System Check”
performed?—Go to Step 2Go to OBD
System Check
2 1. Perform a bulletin search.
2. If a bulletin that addresses the symptom is found,
correct the condition as instructed in the bulletin.
Was a bulletin found that addresses the symptom?—Verify repair Go to Step 3
3 Was a visual/physical check performed?
—Go to Step 4Go to Visual /
physical Check.
4 Does the customer continual accelerate On/Off during
cold condition?—System OK Go to Step 5
5 Is the customer using the incorrect fuel type?
—Replace with
unleaded fuel Go to Step 6
6 Check for vacuum leaks (vacuum lines, intake
manifold, throttle body, etc.)
Were any vacuum leaks found?—Go to Step 17Go to Step 7
7 1. Check fuel cap for proper installation.
2. Secure the fuel cap if necessary.
Was a problem found?—Go to Step 17Go to Step 8
8 Check the fuel pressure. Refer to 6E-108 page “Fuel
System Diagnosis” .
Was a problem found?—Go to Step 17Go to Step 9
9 1. Check for faulty, plugged or incorrectly installed
PCV valve.
2. Verify that the PCV system is not plugged.
Was a problem found? —Go to Step 17Go to Step 10
10 Check the injector connectors, if any of the injectors
are connected to an incorrect cylinder, correct as
necessary.
Was a problem found?—Go to Step 17Go to Step 11
11 Perform the
Injector Coil/Balance Test
(Refer to 6E-
98 page).
Was a problem found.—Go to Step 17Go to Step 12
12 Check for a problem with the engine cooling system.
Was a problem found?—Go to Step 17Go to Step 13
13 Check EVAP canister for fuel loading. Refer to
Evaporative Emission Control System.
Was a problem found?—Go to Step 17Go to Step 14
14 Check the EVAP purge solenoid valve operation.
Is the valve operated normally?—Go to Step 17Veri fy repai r &
Go to Step 15
15 Check the ex haust system for a possible restriction:
Damaged or collapsed pipes
Internal catalytic converter failure
Was a problem found?—Verify repair &
Go to Step 16Go to Step 17

GENERAL INFORMATION 0A-5

7. Measurement criteria are defined by the terms "standard" and "limit".

A measurement falling within the "standard" range indicates that the applicable part or parts are serviceable.
"Limit" is an absolute value.

A measurement falling outside the "limit" indicates that the applicable part or parts must be repaired or replaced.
8. Components are parts are listed in the singular form throughout the Workshop Manual.
9. The following directional criteria are used throughout the Workshop Manual:

Front:

The cooling fan side of the engine.
Right:

The right-hand side of the engine viewed from the flywheel.

Left:
The left-hand side of the engine viewed from the flywheel.

Rear:

The flywheel side of the engine.
Cylinder numbers are counted from the front of the engine towards the rear.

The engine's rotation is clockwise viewed from the front of the engine.

MAINTENANCE AND LUBRICATION 0B-5
MAINTENANCE SCHEDULE (For EUROPE)
Items followed by an asterisk (*) require more frequent maintenance if the vehicle is driven under severe conditions.
Refer to "SEVERE CONDITIONS MAINTENANCE SCHEDULE."
Diesel Engine model (ACEA B2 specification engine oil)

I : Inspect and correct or replace as necessary A : Adjust
R : Replace or change T : Tighten to specified torque L : Lubricate


SERVICE INTERVAL:
1,000 km 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100(Use odometer reading or
1,000 miles 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60months whichever comes
fi rst)
or months 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120
DIESEL ENGINE * Engine oil (4JH1-TC) - R - R - R- R- R- R- R - R - R- R* Engine oil (4JA1-TC) - - R - - R - - R - - R - - R - - R - - * Engine oil filter(4JH1-TC) - R - R - R- R- R- R- R - R - R- R* Engine oil filter (4JA1-TC) - - R - - R - - R - - R - - R - - R - - Oil leakage and contamination I I I I I I I I I I I I I I I I I I I I Idling speed and acceleration I I I I I I I I I I I I I I I I I I I I Fan belt tension and damage I I I I I I I I I I I I I I I I I I I I Exhaust system I I - I - I - I - I - I - I - I - I - I All hoses and pipes in engine
compartment for clog of damage - I I I I I I I I I I I I I I I I I I I
Valve clearance (4JH1-TC) - - - A - - - A - - - A - - - A - - - A Valve clearance (4JA1-TC) - - A - - A - - A - - A - - A - - A - - * Air cleaner element (4JH1-TC) I I I I I I I R I I I I I I I R I I I I * Air clearance element (4JA1-TC) - - I I I I I I R I I I I I I I I R I I Fuel filter (4JH1-TC) - - R - - R - - R - - R - - R - - R - - Fuel filter (4JA1-TC) - - - - - - - - R - - - - - - - - R - - Engine coolant concentration (4JH1-TC) - I - I - I - I - I - I - I - I - I - I Engine coolant concentration
(4JA1-TC) - - I - - I - - I - - I - - I - - I - - Cooling system for water leakage
(4JH1-TC) - I - I - I - I - I - I - I - I - I - I Cooing system for water leakage (4JA1-TC) - - I - - I - - I - - I - - I - - I - - CLUTCH Clutch fluid (4JH1-TC) I I - I - I - I - I - I - I - I - I - I Clutch fluid (4JA1-TC) - - I - - I - - I - - I - - I - - I - - Clutch pedal travel and play (4JH1-TC) I I - I - I - I - I - I - I - I - I - I Clutch pedal travel and play (4JA1-TC) - - I - - I - - I - - I - - I - - I - - TRANSMISSION OR TRANSMISSION
WITH TRANSFER CASE
* Manual transmission with fluid (4JH1-TC) - R - I - - - R - - - I - - - R - - - I * Manual transmission with fluid
(4JA1-TC) - - R - - I - - R - - I - - R - - I - - * Transfer case oil (4JH1-TC) - - - I - - - I - - - I - - - I - - - I * Transfer case oil (4JA1-TC) - - R - - I - - R - - I - - R - - I - - Oil leakage (4JH1-TC) I I I I I I I I I I I I I I I I I I I I Oil leakage (4JA1-TC) - - I - - I - - I - - I - - I - - I - - Gear control mechanism for
looseness (4JH1-TC) - - - I - - - I - - - I - - - I - - - I Gear control mechanism for
looseness (4JA1-TC) - - - - - - - - I - - - - - - - - I - I * AT Automatic transmission fluid
(4JH1-TC) - - - I - - - I - - - I - - - I - - - I * AT Automatic transmission fluid (4JA1-TC) - - - - - - - - I - - - - - - - - I - I * AT Transfer case oil (4JH1-TC) - R - I - - - R - - - I - - - R - - - I * AT Transfer case oil (4JA1-TC) - - R - - I - - R - - I - - R - - I - -

MAINTENANCE AND LUBRICATION 0B-9


Diesel Engine model (Engine oil that meet or exceeds ACEA B3 specification)
I : Inspect and correct or replace as necessary A : Adjust
R : Replace or change T : Tighten to specified torque L : Lubricate


SERVICE INTERVAL:
1,000 km 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100(Use odometer reading or
1,000 miles 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60months whichever comes
fi rst)
or months 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120
DIESEL ENGINE * Engine oil - - - R - - - R - - - R - - - R - - - R* Engine oil filter - - - R - - - R - - - R - - - R - - - ROil leakage and contamination - - - I - - - I - - - I - - - I - - - I Idling speed and acceleration - - - I - - - I - - - I - - - I - - - I Fan belt tension and damage - - - I - - - I - - - I - - - I - - - I Exhaust system - - - I - - - I - - - I - - - I - - - I All hoses and pipes in engine
compartment for clog of damage
-
-
-
I
-
-
-
I
-
-
-
I
-
-
-
I
-
-
-
I
Valve clearance - - - A - - - A - - - A - - - A - - - A * Air cleaner element - - - I - - - I - - - R - - - I - - - I Fuel filter - - - - - - - - - - - R - - - - - - - - Engine coolant concentration - - - I - - - I - - - I - - - I - - - I Cooling system for water leakage - - - I - - - I - - - I - - - I - - - I CLUTCH Clutch fluid - - - I - - - I - - - I - - - I - - - I Clutch pedal travel and play - - - I - - - I - - - I - - - I - - - I TRANSMISSION OR TRANSMISSION
WITH TRANSFER CASE
* Manual transmission with fluid - - - R - - - I - - - R - - - I - - - I * Transfer case oil - - - R - - - I - - - R - - - I - - - I Oil leakage - - - I - - - I - - - I - - - I - - - I Gear control mechanism for
looseness - - - - - - - - - - - I - - - - - - - -
* AT Automatic transmissi on fl ui d - - - - - - - - - - - I - - - - - - - - * AT Transfer case oil - - - R - - - I - - - R - - - I - - - R PROPELLER SHAFT Loose connections - - - I - - - I - - - I - - - I - - - I * Universal joints and splines for wear - - - I - - - I - - - I - - - I - - - I 4WD Universal joints and sliding
sleeve - - - L - - - L - - - L - - - L - - - L
FRONT AND REAR AXLE * Differential gear oil (Front and rear) - - - R - - - I - - - R - - - I - - - ROil leakage - - - I - - - I - - - I - - - I - - - I Shift on the fly system Gear oi l - - - - - - - - - - - I - - - - - - - - Front axle shaft rubber boot for
damage - - - - - - - - - - - I - - - - - - - I
Axle case for distortion or damage - - - - - - - - - - - I - - - - - - - I Axle shafts for distortion or damage - - - - - - - - - - - I - - - - - - - I STEERING Power steering fluid - - - I - - - R - - - I - - - R - - - I Oil leakage - - - I - - - I - - - I - - - I - - - I * Steering system for looseness or
damage - - - I - - - I - - - I - - - I - - - I
Power steering hose - - - I - - - I - - - I - - - R - - - I Steering wheel play - - - I - - - I - - - I - - - I - - - I Steeri ng function - - - I - - - I - - - I - - - I - - - I Right and left turning radius - - - - - - - - - - - I - - - - - - - - Wheel al i gnment - - - - - - - - - - - I - - - - - - - - Joi nt ball for oil l eakage or damage - - - I - - - I - - - I - - - I - - - I Joi nt ball rubber boot for damage - - - I - - - I - - - I - - - I - - - I

0B-14 MAINTENANCE AND LUBRICATION


GRADE LUBRICATION MAKE BRAND / TYPE
API ACEA
Automatic transmission
Power steering ISUZU GENUINE
EXXON / ESSO
MOBIL
CALTEX
SHELL
ELF
TOTAL
CASTROL
CASTROL BESCO ATF III, ATF II
ESSO ATF D (DEXRON

II-D)
MOBIL ATF (DEXRON
III)
ATF HD (DEXRON
II)
SHELL DONAX TA (DEXRON
II-D)
ELFMATIC G3 (DEXRON
III)
TOTAL FLUID IID (DEXRON
II-D)
TQ-D (DEXRON
II)
TQ DEXRON III (DEXRON
III)
















Grease fitting
(Multi purpose grease) ISUZU GENUINE
EXXON / ESSO
MOBIL
CALTEX / TEXACO
SHELL
TOTAL
CASTROL BESCO L-2 GREASE (No.2), L-3 GREASE (No.3)
RONEX MP (No.2)
MOBILGREASE HP 222 (No.2)
STARPLEX-2 (No.2)
RETINAX A (No.2)
MULTIS EP2, EP3 (No.2, No.3)
LM GREASE (No.2, No.3)












Propeller shaft sliding yoke
Universal joint
Multi purpose grease
containing molybdenum
disulfide ISUZU GENUINE
EXXON / ESSO
EXXON / ESSO
CALTEX
TOTAL ONE LUBER MO GREASE
BEACON Q2 (No.2)
MULTIPURPOSE GREASE (Moly) (No.2)
MOLYTEX GREASE EP2 (No.2)
TOTAL MULTIS MS2 (No.2)








Engine cooling system ISUZU GENUINE
TEXACO


CALTEX

GM GENUINE BESCO LLC SUPER TYPE E
HAVOLINE EXTENDED LIFE ANTIFREEZE
COOLANT
HAVOLIN XLC
EXTENDED LIFE COOLANT 6280
XLC
GOODWRENCH DEX-COOL
(TM) ANTIFREEZE
EXTENDED LIFE COOLANT















FLUID TYPE
Clutch and brake fluid reservoir Besco brake fluid (For light duty)
Hydraulic brake fluid SAE J1703
FMVSS 116 DOT.3 grade


DIESEL FUEL/APPLICABLE STANDARD
JIS (JAPANESE INDUSTRIAL STANDARD) Based on K2204 GAS OIL
DIN (DEUTSCHE INDUSTRIE NORMEN) Based on EN590 : 1997
SAE (SOCIETY OF AUTOMOTIVE ENGINEERS) Based on SAE J-313C
BS (BRITISH STANDARD) Based on BS EN590 : 1997


NOTE:
Use the applicable standard or equivalent for diesel fuels.

MAINTENANCE AND LUBRICATION 0B-15
RECOMMENDED FLUIDS AND LUBRICANTS (For EUROPE)






In order to obtain maximum performance and longest service life from your ISUZU vehicles, it is very important to
select and use correctly best lubricants and diesel fuels.
When lubricating, be sure to use ISUZU genuine lubricants or recommended lubricants listed below, according to
the maintenance schedule for each vehicle model.

LUBRICATION/FLUID GRADE
API ACEA OTHER
Diesel engine crankcase B2/B3
E2/E3
Manual transmission
Transfer case B2/B3
E2/E3
Differential
Shift on the fly system
(GL-5 only)
GL-5 BESCO GEAR OIL SH (80W-90, 90, 140) (ISUZU GENUINE)
BESCO SHIFT ON THE FLY (75W-90) (ISUZU GENUINE)
GEAR OIL GX (85W-90) (EXXON / ESSO)
MOBILUBE HD (80W-90, 85W-140) (MOBIL)
THURBAN GL-5 EP (80W-90, 85W-140) (CALTEX)
SPIRAX HD (90, 140) (SHELL)
TRANSELF TYPE B (80W-90, 85W-140) (ELF)
TRANSMISSION TM (80W-90, 85W-140) (TOTAL)
Differential
(Limited Slip Differential)
GL-5 * Limited
Slip
Differential
Gear
Lubricant
BESCO GEAR OIL LSD (140) (ISUZU GENUINE)
GEAR OIL LSA (90) (EXXON/ESSO)
MOBILUBE HD LS (80W-90) (MOBIL)
GEAR OIL LSD (90) (CALTEX)
TRANSELF TYPE BLS (90) (SHELL)
TRANSMISSION DA (85W-90) (ELF)
HYPOY LS (90) (TOTAL)
Automatic transmission
Power steering
DEXRON II, III
Propeller shaft sliding yoke
Universal joint
(General purpose grease in
Molybdenum) NLGI #2 or #3
multi purpose type grease
containing molybdenum disulfide
Engine cooling system Good quality ethylene glycol antifreeze or GM spec.
6033-M or equivalent
* If GL-5 Limited Slip Differential Lubricant is not available, use GL-5 Lubricant together with Limited Slip Differential Lubricant additive (Parts No. 8-01052-358-0) or
equivalent.



FLUID TYPE

Clutch and brake fluid reservoir Besco brake fluid (For light duty)
Hydraulic brake fluid SAE J1703
FMVSS 116 DOT.3 grade


DIESEL FUEL/APPLICABLE STANDARD
JIS (JAPANESE INDUSTRIAL STANDARD)
DIN (DEUTSCHE INDUSTRIE NORMEN)
SAE (SOCIETY OF AUTOMOTIVE ENGINEERS)
BS (BRITISH STANDARD) Based on K2204 GAS OIL
Based on EN590: 1997L
Based on SAE J-313C
Based on BS EN590: 1997
NOTE:
Use the applicable standard or equivalent for diesel fuels.

HEATER AND AIR CONDITIONING 1-3
GENERAL DESCRIPTION
SYSTEM COOLING LINE










1.
Compressor 8.
Evaporator core
2.
Magnetic clutch 9.
Blower motor
3.
Receiver/Drier 10.
Heater unit
4.
Dual pressure switch or Trinary 11.
Mode (DEF/FOOT) control door

pressure switch (4J

-TC, 6VE1, 12.
Mode (VENT) control door
C24SE) 13.
Electronic thermostat
5.
Condenser 14.
Heater core
6.
Evaporator assembly
7.
Expansion valve

RTW310LF001001

HEATER AND AIR CONDITIONING 1-15
MAIN DATA AND SPECIFICATIONS

AIR COMPRESSOR

Model CR-14
Type 5 Vane rotary type
Displacement cm3 (lmp fl oz) 144 (4.03)
Oil type DH-PR
Oil capacity cm3 (lmp fl oz) 180 (5.04)
Magnetic clutch Type: Dry single disc dia. 109 mm (4.3 in.)

HEATING UNIT (VENT UNIT)

Type Rehead air mix
Core dimension mm (in.) (L

H

W) 180 (7.06)

182.3 (7.18)

27 (1.06)
Capacity (kcal./hr.) 4200

BLOWER UNIT

Type Sirocco fan type

COOLING UNIT

Type Fin and tube evaporator
Evaporator element dimensions mm (in.) (L

H

W) 230 (9.06)

212 (8.35)

74 (2.91)
Evaporator capacity (kcal./hr.) 2960/4420 kcal./hr. (300/500 m3/hr.)
* Expansion Valve type
External pressure equalizer type
* Thermo Switch type (Cooler)
Variable electronic thermostat

Maximum Cool position (
C)
OFF 3
0.5
DIFF 1.5
0.5

Minimum Cool position (
C)
OFF 11.6 2
DIFF 2.9 2
* Thermo Switch type (A/C) (
C)
Fixed electronic thermostat
OFF 3
0.5
DIFF 1.5
0.5
* Trinary Pressure Switch
Low pressure control and High pressure control are same
as Dual pressure switch
* Medium pressure control
OFF 1128  118 kpa (11.5  1.2 kg/cm
2G)
ON 1521  88 kpa (15.5  0.92 kg/cm2G)
CONDENSER
Type Aluminum louvered fins
Capacity (kcal./hr.) 12300 kcal./hr.

ELECTRIC FAN

Fan Dia
250
Motor Power (w) 90