2004 ISUZU TF SERIES engine remove

6E-374 3.5L ENGINE DRIVEABILITY AND EMISSIONS
FUEL PRESSURE RELIEF
Caution:
To reduce the risk of the fire and personal injury, it
is necessary to relive 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 o
f
personal injury by covering the fuel line fitting with
a short 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.

1. Remove the fuel filler cap.
2. Remove the fuel pump relay.
3. Start the engine and allow it to stall.
4. Crank the engine for about 30 seconds.
5. Disconnect the negative battery cable.



FUEL RAIL ASSEMBLY

Removal Procedure
NOTE:
 Do not attempt to remove the fuel inlet fitting on
the fuel rail. It is staked in place. Removing the
fuel inlet fitting will result in damage to the fuel
rail or the internal O-ring seal.
 Use care when removing the fuel rail assembly in
order to prevent damage to the injector electrical
connector terminals and the injector spray tips.
 Fittings should be capped and holes plugged
during servicing to prevent dirt and othe
r
contaminants from entering open lines and
passages.
Important: Before removal, the fuel rail assembly may
be cleaned with a spray type engine cleaner. Follow the
spray package instructions. Do not immerse the fuel
rails in liquid cleaning solvent.
1. Depressurize the fuel system. Refer to Fuel
Pressure Relief Procedure in this Section.
2. Disconnect the negative battery cable.
3. Remove the engine cover.
4. Disconnect the accelerator pedal cable from throttle
body and cable bracket.

5. Disconnect the connectors from, solenoid valve,
sensing valve.
6. Disconnect the vacuum hose on canister solenoid
and positive crankcase ventilation hose.
7. Remove the common chamber Refer to the
common chamber in Engine Mechanical.
1. Lift up carefully on the fuel injectors. Do no
t
separate the fuel injectors from the fuel rail.
2. If an injector becomes separated from the fuel
rail, the infector O-ring seals and the retaine
r
clip must be replaced.
3. Drain residual fuel into an approved container.




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8. If removal of the fuel pressure regulator is
necessary, refer to Fuel Pressure Regulator.
9. If removal of the fuel injectors is necessary, refer to
Fuel Injectors.

Installation Procedure
1. If the fuel injectors were removed, install them.
Refer to Fuel Injectors.
2. If the fuel pressure regulator was removed, install
it. Refer to Fuel Pressure Regulator.

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-375
3. Install the common chamber. Refer to common
chamber in engine Mechanical.




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4. Connect the vacuum hose on Canister Solenoid
and positive crankcase ventilation hose.
5. Connect the connectors to, solenoid valve.
6. Connect the accelerator pedal cable to throttle
body and cable bracket.
7. Install the engine cover.
8. Connect the negative battery cable.
9. Crank the engine until it starts. Cranking the
engine may take longer than usual due to trapped
air in the fuel rail and in the injectors.

FUEL INJECTORS

Removal Procedure
NOTE: If the fuel injectors are leaking, the engine oil
may be contaminated with fuel. Check the oil fo
r
signs of contamination and change the oil and the
filter if necessary.
NOTE: Use care in removing the fuel injectors in
order to prevent damage to the fuel injecto
r
electrical connector pins or the fuel injector
nozzles. The fuel injector is an electrical component
and should not be immersed in any type of cleane
r
as this may damage the fuel injector.
Important: Fuel injectors are serviced as a complete
assembly only.
1. Disconnect the negative battery cable.
2. Remove the upper intake manifold. Refer to
Common Chamber in Engine Mechanical..
3. Remove the fuel rail. Refer to Fuel Rail.




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6E-376 3.5L ENGINE DRIVEABILITY AND EMISSIONS
4. Remove the injector retainer clip.






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5. Remove the fuel injector assembly.
6. Remove the O-ring from the fuel injector.
7. Remove the O-ring backup from the fuel injector .

Inspection Procedure
1. Inspect the O-rings for cracks or leaks.
2. Replace worn or damaged O-rings.
3. Lubricate the new O-rings with engine oil before
installation.

Installation Procedure
1. Install the O-ring backup on the fuel injector.
2. Install the new O-ring on the fuel injector.
3. Install the fuel injector on the fuel rail.






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4. Use new fuel injector retainer clips to retain the fuel
injector to the fuel rail.
5. Coat the end of the fuel injector with engine oil.
6. Install the fuel rail. Refer to Fuel Rail.




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7. Install the upper intake manifold. Refer to Common
Chamber in Engine Mechanical.
8. Install the engine cover.
9. Connect the negative battery cable.

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-377
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 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
fittings with a shop towel before disconnecting the
fittings. The towels 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 result.
NOTE: To prevent damage to the fuel pressure
regulator, do not immerse the pressure regulator in
solvent.
1. Depressurize the fuel system. Refer to Fue
l
Pressure Relief Procedure.
2. Disconnect the negative battery cable.
3. Remove the fuel pump relay. Refer to Fuel Pump
Relay.
4. Remove the pressure regulator hose from the fuel
pressure regulator.
5. Remove the two bolts from the protector tha
t
secures the common chamber.



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6. Remove the fuel pressure regulator attaching
screw.




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7. Remove the fuel pressure regulator from the fuel
rail.

Disassembly Procedure
1. Remove the O-ring from the fuel pressure regulator.
2. Remove the fuel return line from the fuel pressure
regulator.
3. Remove the O-ring from the fuel return line.
 The O-ring may be left inside the fuel pressure
regulator instead of on the fuel return line.




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3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-379
IGNITION COIL

Removal Procedure
1. Disconnect battery ground cable.
2. Ignition coil connector and ignition coil.
 Disconnect three connector from ignition coil.
 Remove harness bracket bolt on cylinder head
cover.
 Remove fixing bolts on ignition coil.




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Legend
(1) Ignition Coil Connector
(2) Bolt
(3) Ignition Coil Assembly


Inspection Procedure
Check the ignition coil assembly for insulation. Check
terminals for corrosion or damage, and replace as
necessary.
Measuring resistance of ignition coil assembly.


Terminal No. Limit
1 to 2 Without 0 ohm or infinity
maximum ohm.
1 to 3 Same as above
2 to 3 Same as above


Measure resistance of ignition coil assembly, and
replace the ignition coil assembly if its value exceeds
the standard.





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Installation Procedure
1. Install the ignition coil assembly (3).
Connect ignition coil connector (1) and ignition coil
(3), then tighten bolt (2) to the specified torque.
Torque: 4 N




m (0.4 kg




m/35 lb in)





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2. Connect battery ground cable.

6E-380 3.5L ENGINE DRIVEABILITY AND EMISSIONS
SPARK PLUGS

Removal Procedure
1. Remove spark plugs.

Inspection Procedure
The spark plug affects entire engine performance and
therefore its inspection is very important.
 Check electrode and insulator for presence o
f
cracks, and replace if any.
 Check electrode for wear, and replace if necessary.
 Check gasket for damage, and replace if necessary.
 Measure insulation resistance with an ohmmeter,
and replace if faulty.
 Adjust spark plug gap to 1.0 mm (0.04 in)

1.1 mm
(0.043 in).
 Check fuel and electrical systems if spark plug is
extremely dirty.
 Use spark plugs having low heat value (hot type
plug) if fuel and electrical systems are normal.
 Use spark plugs having high heat value (cold type
plug) if insulator and electrode are extremely
burned.
Sooty Spark Plugs
Much deposit of carbon or oil on the electrode and
insulator of spark plug reduces the engine performance.
Possible causes:
 Too rich mixture
 Presence of oil in combustion chamber
 Incorrectly adjusted spark plug gap
Burning Electrodes
This fault is characterized by scorched or heavily
oxidized electrode or blistered insulator nose.
Possible causes:
 Too lean mixture
 Improper heat value

Measuring Insulation Resistance
 Measure insulation resistance using a 500 volt
megaohm meter.
 Replace spark plugs if measured value is out o
f
standard.
Insulation resistance: 50 M
  or more




011RS010
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 before 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.

6F-4 ENGINE EXHAUST (6VE1 3.5L)
Three Way Catalytic Converter and Center Exhaust Pipe
Three Way Catalytic Converter and Center Exhaust Pipe and Associated Parts



RTW46FMF000201
Legend (4) Three Way Catalytic Converter LH
(1) Front Exhaust Pipe Fixing Nuts (5) Mounting Rubber
(2) O
2 Sensor (6) Exhaust Pipe Fixing Nuts
(3) Three Way Catalytic Converter RH (7) Center Exhaust Pipe


Removal
1. Disconnect battery ground cable.
2. Lift up the vehicle and support with suitable safety
stands.
3. Disconnect O
2 sensor harness connectors (2).
4. Remove the center exhaust pipe fixing nuts (6) and
the exhaust silencer fixing bolts, then remove the
center exhaust pipe and the mounting rubber.
5. Remove the front exhaust pipe fixing nuts (1) and
the mounting rubber, then remove the three way
catalytic converter (3) (4).
Installation
1. Install the three way catalytic converter (3) (4) and
the mounting rubber, and tighten the fixing nuts (1)
to the specified torque.
Torque : 67 N




m (6.8 kg




m/49 lb ft)
2. Install the center exhaust pipe and the mounting
rubbler, and tighten the fixing nuts (6) and bolts to
the specified torque.
Torque : 43 N




m (4.4 kg




m/32 lb ft)
3. Connect the O
2 sensor connectors (2).

ENGINE EXHAUST (6VE1 3.5L) 6F-5
Exhaust Silencer and Rear Exhaust Pipe
Exhaust Silencer & Tail Pipe and Associated Parts



RTW46FMF000301
Legend (4) Exhaust Silencer Mounting Rubber
(1) Center Exhaust Pipe (5) Exhaust Silencer & Tail Pipe
(2) Exhaust Pipe Fixing Bolts (6) Rear Exhaust Pipe Mounting Rubber
(3) Exhaust Pipe Fixing Nuts


Removal
1. Disconnect battery ground cable.
2. Lift up the vehicle and support with suitable safety
stands.
3. Remove the exhaust pipe fixing nuts (3) and bolts
(2).
4. Remove the silencer and rear exhaust pipe
mounting rubber (4)(6), then remove the exhaus
t
silencer (5) and rear exhaust pipe (6).

Installation
1. Install the exhaust silencer and pipe (5), then install
the exhaust silencer and rear exhaust pipe
mounting rubber (4)(6).
2. Tighten the exhaust pipe fixing nuts (3) and exhaus
t
pipe fixing bolts (2).
Torque: 43 N




m (4.4 kg




m/32 lb ft)