torque ISUZU TF SERIES 2004 Workshop Manual

ENGINE COOLING 6B-9
Thermostat





























Removal
1. Disconnect battery ground cable.
2. Drain engine coolant from the radiator and engine.
3. Disconnect radiator hose from the inlet pipe.
4. Remove thermostat housing.
5. Remove thermostat from thermostat housing.
Inspection
Suspend the thermostat in a water-filled container using thin
wire. Place a thermometer next to the thermostat.
Do not directly heat the thermostat.
Gradually increase the water temperature. Stir the water so
that the entire water is same temperature.
Confirm the temperature when the valve first begins to open.
Valve opening temperature 92
 C (197.6
 F)
Confirm the temperature when the valve is fully opened.
Valve full open temperature 107
 C(224.6
 F)
Make necessary repair and parts replacement if extreme wear
or damage is found during inspection.
Installation
1. Before installing thermostat, coat sealing surface with
silicon grease.
2. Install O-ring.
3. Install thermostat housing and tighten bolts to the specified
torque.
Torque: 15 N




m (1.5 kgf




m)
4. Installation rubber hose.
5. Replenish engine coolant (EC).
6. Start engine and check for EC leakage.













Fan Clutch with Cooling Fan
Inspection and Repair
Make necessary correction or parts replacement if wear,
damage or any other abnormal condition are found through
inspection.

Visually inspect for damage, leak (silicon grease) or other
abnormal conditions.
1. Inspection (on-vehicle)
1) Turn the fan clutch by hand when in a low temperature
condition before starting the engine, and confirm that it
can be turned readily.
2) Start the engine to warm it up until the temperature at the
fan clutch portion gets to around 80C. Then stop the
engine and confirm that the fan clutch can be turned with
considerable effort (clutch torque) when turned by hand.

6B-10 ENGINE COOLING
If the fan clutch rotates more readily, however, this
indicates that the silicon grease is leaking internally.
Replace the fan clutch with a new one.

2. Inspection (in unit)
Warm up the bimetal of the fan clutch by using the heat gun
until the temperature gets to about 80C when measured
with the thermistor. Then confirm that the fan clutch can be
turned with considerable effort (clutch torque).
If the fan clutch retates more readily at this time, this
indicates that the silicon grease is leaking internally.
Replace the fan clutch with a new one.

ENGINE FUEL (C24SE) 6C-3


When working on the fuel system, there are several things to
keep in mind:


Any time the fuel system is being worked on, disconnect the
negative battery cable except for those tests where battery
voltage is required.


Always keep a dry chemical (Class B) fire extinguisher near
the work area.

Replace all pipes with the same pipe and fittings that were
removed.

Clean and inspect "O" rings. Replace if required.


Always relieve the line pressure before servicing any fuel
system components.

Do not attempt repairs on the fuel system until you have
read the instructions and checked the pictures relating to
that repair.

Adhere to all Notices and Cautions.
All gasoline engines are designed to use only unleaded
gasoline. Unleaded gasoline must be used for proper emission
control system operation.
Its use will also minimize spark plug fouling and extend engine
oil life. Using leaded gasoline can damage the emission control
system and could result in loss of emission warranty coverage.
All cars are equipped with an Evaporative Emission Control
System. The purpose of the system is to minimize the escape
of fuel vapors to the atmosphere.



Service Precaution
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 othe
r
corrosion inhibitors) on threaded fasteners or fastene
r
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.

6C-14 ENGINE FUEL (C24SE)
Removal
CAUTION: When repair to the fuel system has been
completed, start engine and check the fuel system
for loose connection or leakage. For the fuel system
diagnosis, see Section “Driveability and Emission".
1. Disconnect battery ground cable.
2. Loosen slowly the fuel filler cap.
NOTE: To prevent spouting out fuel to change the
pressure in the fuel tank.
NOTE: Cover opening of the filler neck to prevent any
dust entering.
3. Jack up the vehicle.
4. Support underneath of the fuel tank with a lifter.
5. Remove the inner liner of the wheel house on rea
r
left side.
6. Remove fasten bolt to the filler neck from the
body.
7. Disconnect the quick connector (8) into the fuel
tube from the fuel pipe and the evapo tube from
evapo joint connector.
NOTE: Cover the quick connector to prevent any dus
t
entering and fuel leaking.
NOTE: Refer to “Fuel Tube/Quick Connector Fittings” in
this section when performing any repairs.
8. Remove fasten bolt (1) to the tank band and the
tank band (2).
9. Disconnect the pump and sender connector on the
fuel pump and remove the harness from weld clip
on the fuel tank.
10. Lower the fuel tank (6).
NOTE: When the fuel tank is lowered from the vehicle,
don’t scratch each hose and tube by around other pars.


Installation
1. Rise the fuel tank into position.
NOTE: Ensure hoses and tubes do not foul on othe
r
component.
2. Connect the pump and sender connector to the
fuel pump and install harness to into the plastic clip
welded to the top of the fuel tank..
NOTE: The connector must be certainly connected
against stopper.
Ensure tank band anchor mates with guide hole on
frame.
3. Install the tank band to fasten bolt.
Torque: 68 N




m (6.9kg




m/50 lb ft)
NOTE: The anchor of the tank band must be certainly
installed to guide hole on frame.
4. Connect the quick connector from the fuel tube to
the fuel pipe and the evapo tube from evapo join
t
connector.
NOTE: Pull off the left checker into the fuel pipe.
NOTE: Refer to “Fuel Tube/Quick Connector Fittings” in
this section when performing any repairs.
5. Install the filler neck to the body by bolt.
6. Install the inner liner of the wheel house on rea
r
side.
7. Remove lifter to support underneath of the fuel
tank.
8. Put back the vehicle.
9. Tigten the filler cap until at least three clicks are
heard.
10. Connect the battery ground cable.

ENGINE FUEL (C24SE) 6C-15
Filler Neck
Removal
1. Remove the fuel tank.
NOTE: Refer to "Fuel Tank" in this section.
2. Put a marking the following point as the filler neck
assembly is restored.

Each joint area of the hose (to restore axial
direction and insertion length of the hose)

Each fasten area of the clamp (to restore axial
direction and position of the clamp)

Each bolt in the clamp (to restore fasten length
of bolt in the clamp)

The band clip (to restore position and fasten
length of the band clip)
NOTE: Cover end of each hose and pipe to prevent any
dust entering.
Installation
1. Align each marking and restore the following point.

Each joint area of the hose (Restore axial
direction and insertion length of the hose)

Each fasten area of the clamp (Restore axial
direction and position of the clamp)

Each bolt in the clamp (Restore fasten length o
f
bolt in the clamp)
Torque: 2.5 N




m (0.25 kg




m / 2 lb ft) … filler neck
side except flat deck model.

The band clip (Restore position and fasten
length of the band clip)
2. Install the fuel tank.
NOTE: Refer to "Fuel Tank" in this section.


Fuel Gauge Unit
Removal and Installation
As for removal and installation of the Fuel Gauge Unit,
refer to “Fuel Tank" of this section 6C as the fuel gauge
unit is combined with the fuel pump and sende
r
assembly.

ENGINE FUEL (C24SE) 6C-17
Main Data and Specifications
Torque Specification
N




m (kg




m/ lb ft)




RTW46CLF000601

6D1-2 ENGINE ELECTRICAL

Battery
General Description
There are six battery fluid caps on top of the battery.
These are covered by a paper label.
The battery is completely sealed except for the six small vent
holes on the side. These vent holes permit the escape of small
amounts of gas generated by the battery.
This type of battery has the following advantages over
conventional batteries:
1. There is no need to add water during the entire service life
of the battery.
2. The battery protects itself against overcharging.
The battery will refuse to accept an extensive charge.
(A conventional battery will accept an excessive charge,
resulting in gassing and loss of battery fluid.)
3. The battery is much less vulnerable to self discharge than a
conventional type battery.



Service Precaution
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.

6D2-2 IGNITION SYSTEM



General Description
Ignition is done by the Ignition Module that fires.
Since the cylinder on exhaust stroke requires less energy to
fire its spark plug, energy from the ignition coils can be utilized
to fire the mating cylinder on compression stroke.
A notch in the timing disc on the crankshaft activates the crank
angle sensor which then sends information such as firing order
and starting timing of ignition coil to the ECM.
By receiving signals such as crank position, engine speed,
water temperature and Manifold Absolute Pressure (MAP), the
ECM controls the ignition timing.




Service Precaution
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.




Diagnosis
Refer to Section Drivability and Emissions for the diagnosis to
electronic ignition system (El system).





Ignition Coil
Removal
1. Disconnect battery ground cable.
2. Disconnect the Ignition coil connector.
3. Remove the ignition coil.



Installation
1. Install the ignition coil.
Connect ignition coil connector and ignition coil, then tighten
bolt to the specified torque.
Torque: 20 N




m (2.0 kgf




m)
2. Connect battery ground cable.

6D2-4 IGNITION SYSTEM


Cleaning Spark Plugs


Clean spark plugs with a spark plug cleaner.

Raise the ground electrode to an angle of 45 to 60 degrees.
if electrode is wet, dry it gefore cleaning.



After spark plug is thoroughly cleaned, check insulator for
presence of cracks.






Clean threads and metal body with a wire brush.


File the electrode tip if electrode is extremely worn.


Bend the ground electrode to adjust the spark plug gap.



Installation
1. Spark plugs


Tighten spark plugs to the specified torque.
Torque: 25 N





m (2.5 kgf





m)













Crankshaft Angle Sensor
Removal
1. Disconnect battery ground cable
2. Disconnect the wiring connector from crankshaft angle
sensor.
3. Remove crankshaft angle sensor from cylinder block.
Installation
1. Install crankshaft angle sensor into the cylinder block.
Before installation, apply small amount of engine oil to the
O-ring.
Torque: 6 N





m (0.6 kgf





m)

2. Reconnect wiring connector to crankshaft angle sensor.

IGNITION SYSTEM 6D2-5
Main Data and Specifications
General Specifications
Ignition System
Ignition Form Electronic Ignition System (El system) with Crankshaft angle Sensor
Spark Plug

Type
No. of Coils and Type
Coil Location
Torque Electronic Spark Control
2 Solid State
Engine-mounted
20 Nm (2.0 kgfm)