engine remove ISUZU TF SERIES 2004 Workshop Manual

6E–272 ENGINE DRIVEABILITY AND EMISSIONS
FUEL INJECTOR
Removal Procedure
NOTE: If the fuel injectors are leaking, the engine oil
may be contaminated with fuel. Check the oil for signs
of contamination and change the oil and filter if
necessary.
NOTE: Use care in removing the fuel injector in order to
prevent damage to the fuel injector al connector pins or
fuel injector nozzles. The fuel injector is an al
component and should not be immersed in any type of
cleaner as this may damage the fuel injector.
Important: Fuel injectors are serviced as complete
assembly only.
1. Disconnect the negative battery cable.
2. Disconnect al connector from fuel injector.
3. Remove the fuel rail. Refer to Fuel Rail Removal
Procedure.
4. Remove the fuel injector retainer clip.
5. Remove the fuel injector assembly from fuel rail.
6. Remove O-ring from the fuel injector.
7. Remove O-ring backup from fuel injector.Inspection
1. Inspect O-ring for crack, damage or leaks.
2. Replace worn or damaged O-ring.
3. Lubricate the new O-rings with engine oil before
installation.
Installation Procedure
1. Lubricate the new O-ring with engine oil.
2. Install the O-ring backup on the fuel injector.
3. Install new O-ring on the fuel injector.
4. Install all four injector on the fuel rail.
5. Use new injector retainer clip to retain the injetor to
the fuel rail.
6. Coat the end of the fuel injector with engine oil.

ENGINE DRIVEABILITY AND EMISSIONS 6E–273
7. Install fuel rail assembly. Tighten the nuts to 19 N·m
(1.9 kgf·m). Refer to Fuel Rail Installation
Procedure.
Tighten the flare nut to 27 - 33 N·m (2.8 - 3.4 kgf·m).
8. Connect the negative battery cable.FUEL PRESSURE REGULATOR
Removal Procedure
Caution: To reduce the risk of fire and personal
injury, it is necessary to relieve the fuel system
pressure before servicing the fuel system
components.
Caution: After relieving the fuel system pressure, a
small amount of fuel may be released when
servicing fuel lines or connections. Reduce the
chance of personal injury by covering the fuel line
fitting with a shop towel before disconnecting the
fittings. The towel will absorb any fuel that may leak
out. When the disconnect is completed, place the
towel in an approved container.
NOTE: Compressed air must never be used to test or
clean a fuel pressure regulator, as damage to the fuel
pressure regulator may occur.
NOTE: To prevent damage to the fuel pressure
regulator, do not immerse the pressure regulator in
solvent.
Removal Procedure
1. Depressurize the fuel system. Refer to Fuel
Pressure Relief Procedure.
2. Disconnect the negative battery cable.
3. Remove the fuel pump relay.
4. Disconnect the vacuum line form fuel pressure
regulator.

6E–274 ENGINE DRIVEABILITY AND EMISSIONS
5. Remove the fuel pressure regulator retaining screw.
6. Remove the fuel pressure regulator from fuel rail.
Installation Procedure
1. Insert the fuel pressure regulator into the fuel rail.2. Install the fuel pressure regulator retaining bracket
and tighten with a screw.
3. Connect vacuum line onto the fuel pressure
regulator.
4. Install the fuel pump relay.
5. Connect the negative battery cable.
6. Crank the engine until it starts. Cranking the engine
may take longer than usual due to trapped air in the
fuel line.
7. Tighten the flare nut to 27 - 33 N·m (2.8 - 3.4 kgf·m).

ENGINE DRIVEABILITY AND EMISSIONS 6E–275
IGNITION COIL
Location
Back of the engine right-hand side.
Removal Procedure
1. Disconnect the negative battery cable.
2. Disconnect the ignition coil connector.
3. Disconnect four spark plug cables from the ignition
coil.
4. Loosen three bolts and remove ignition coil from the
bracket.
Installation Procedure
1. Tighten the ignition coil by three bolts.
2. Connect four spark plug cables to the ignition coil.
3. Connect a ignition coil connector to the ignition coil.
4. Connect the negative battery cable.
NOTE: Verify any DTCs (diagnosis Trouble Code) are
not stored after replacement.
Verify proper connection of spark plug cables for each
cylinders.
SPARK PLUGS
Location
Installed on the left-hand side of cylinder head.
Removal Procedure
1. Disconnect the negative battery cable
2. Remove the spark plug cable.
3. Remove the spark plug.
Inspection
1. Check the insulator for cracks. Replace the spark
plug if cracks are present.
2. Check the electrode condition and replace the spark
plug if necessary.
If the spark plug electrodes and insulators are fouled
with carbon or oil, the engine will not operate efficiently.
There are a number of possible causes:
Fuel mix ture is too rich.

ENGINE DRIVEABILITY AND EMISSIONS 6E–277
SPARK PLUG CABLES
The cable contains a synthetic conductor which is easily
damaged. Never stretch or kink the cable. Disconnect
the cable from spark plug and the ignition coil.
The original equipment cables and the ignition coil are
marked to show correct location of the cables. If spark
plug cables or the ignition coil are replaced previously,
before cables are removed from the ignition coil, mark
the cables and the coil so they can be reconnected in
the same position.
Inspection
NOTE: Never puncture the spark plug cable’s insulation
with a needle or the pointed end of a probe into the
cable. An increase in resistance would be created which
would cause the cable to become defective.
1. If the cable has broken or cracked insulation, it must
be replaced.
2. If the terminals are corroded or loose, the cable
must be replaced.
3. Check that the cable resistance does not ex ceed
specified value.
#1 cylinder: 3.50k
- 5.24k

#2 cylinder: 2.89k
- 4.33k

#3 cylinder: 2.49k
- 3.73k

#4 cylinder: 2.22k
- 3.32k

EMISSION CONTROL ;




CO ADJUSTER (W/
O CATALYSTIC CONVERTER)
CO : Carbon monox ide
Location
Under the leht-hand side of the front sheet.
Removal Procedure
1. Remove the left-hand side of the front sheet. Refer
to Sec.10 CAB “Front Sheet”.
2. Disconnect the CO adjuster connector.
3. Remove the CO adjuster.
Installation Procedure
1. Connect the CO adjuster connector.
2. Install the left-hand side of the front sheet. Refer to
Sec.10 CAB “Front Sheet”.
3. Check and adjust CO concentration.
Checking procedure
1. Operate the engine at normal temperature.
2. Turn all accessories switch OFF.
3. Place the select lever in the “N” range.
4. Start the engine at idle.

ENGINE EXHAUST 6F-5
Exhaust Pipe
Exhaust Pipe and Associated parts





RTW46FLF000401













Removal
(2.4L)
CAUTION
When you remove or install the front exhaust pipe, make
sure not to damage the fuel evaporative pipe.
1. Damper rubber
2. Exhaust silencer
3. Mid pipe
4. Damper rubber
5. Front exhaust pipe fixing nut
6. Catalytic converter (If applicable)
7. Front exhaust pipe

ENGINE EXHAUST 6F-7
Front Exhaust Pipe (W/O Catalytic
Converter)
Front Exhaust Pipe and Associated Parts





RTW46F000101
Legend
1. Front Exhaust Pipe Fixing Nuts
2. Front Exhaust Pipe
3. Mid Exhaust Pipe Fixing Nuts










Removal
(2.4L)
1. Disconnect battery ground cable.
2. Raise the vehicle and support with suitable safety stands.
3. Remove the front exhaust pipe fixing nuts (1).
4. Remove mid pipe fixing nuts (3).
5. Remove front exhaust pipe (2).




Installation
1. Install front exhaust pipe (2) and tighten four nuts (1).
Torque:
Nuts: 28 N




m (2.9 kgf




m)
2. Tighten two nuts (3).
Torque: 43 N




m (4.4 kgf




m)

6F-8 ENGINE EXHAUST
Mid Pipe
Mid Pipe and Associated Parts





RTW46FSF000201
Legend
1. Mid Exhaust Pipe
2. Mid Exhaust Pipe Fixing Nuts
3. Exhaust Silencer Fixing Nuts








Removal
(2.4L)
1. Disconnect battery ground cable.
2. Raise the vehicle and support with suitable safety stands.
3. Remove mid pipe fixing nuts (2).
4. Remove exhaust silencer fixing nuts (3).
5. Remove the pipe.





Installation
1. Install mid exhaust pipe (1) and tighten four fixing nuts
(2)(3) to the specified torque:
Torque:
Fixing nuts: 43 N




m (4.4 kgf




m)

ENGINE EXHAUST 6F-9
Catalytic Converter (If applicable)
Catalytic Converter and Associated Parts





RTW46FSF000301
Legend
1. Catalytic Converter
2. O
2 Sensor Converter
3. Front Pipe Fixing Nuts
4. Mid Pipe Fixing Nuts








Removal
(2.4L)
1. Disconnect battery ground cable.
2. Raise the vehicle and support with suitable safety stands.
3. Remove front pipe fixing nuts (3).
4. Remove mid pipe fixing nuts (4).
5. Remove the O
2 sensor connector (2).
6. Remove the front exhaust pipe with catalytic converter (1).





Installation
1. Install Catalytic Converter (1) and tighten four to the
specified torque:
Torque:
Fixing nuts: 28 N




m (2.9 kgf




m)
2. Tight two nuts (4)
Torque:
Nuts: 43 N




m (4.4 kgf




m)
3. Connect the O
2 sensor connector (2).

6F-10 ENGINE EXHAUST
3 WAY CATALYTIC CONVERTER
SYSTEM (If applicable)

N2



Inspection
Make the necessary adjustments, and part replacements if
excessive or damage is discovered during inspection.

Exhaust Pipe Assembly
1. Check connections for looseness or damage.
2. Check clamps for weakness, crack, or damage.


Catalytic Converter
Check for dents or damage.
If any part of the converter is damaged or dented, repair or
replace it.


Removal
1. Jack up the vehicle.
2. Check that the converter is cool.
3. Remove the bolts at the front and rear of the converter.
4. Remove the converter and gaskets.