engine ISUZU AXIOM 2002 Service Repair Manual

6A±17
ENGINE MECHANICAL (6VE1 3.5L)
Fuel Consumption Excessive
ConditionPossible causeCorrection
Trouble in fuel systemMixture too rich or too lean due to
trouble in fuel injection systemRefer to ªAbnormal Combustionº
Fuel cut function does not workRefer to ªAbnormal Combustionº
Trouble in ignition systemMisfiring or abnormal combustion
due to trouble in ignition systemRefer to ªHard Startº or ªAbnormal
Combustionº
OthersEngine idle speed too highReset Idle Air Control Valve
Fuel system leakageCorrect or replace
Clutch slippingCorrect
Brake dragCorrect
Selection of transmission gear
incorrectCaution operator of incorrect gear
selection
Excessive Exhaust Gas
Recirculation flow due to trouble in
Exhaust Gas Recirculation systemRefer to ªAbnormal Combustionº
Lubrication Problems
ConditionPossible causeCorrection
Oil pressure too lowWrong oil in useReplace with correct engine oil
Relief valve stickingReplace
Oil pump not operating properlyCorrect or replace
Oil pump strainer cloggedClean or replace strainer
Oil pump wornReplace
Oil pressure gauge defectiveCorrect or replace
Crankshaft bearing or connecting
rod bearing wornReplace
Oil contaminationWrong oil in useReplace with correct engine oil
Oil filter cloggedReplace oil filter
Cylinder head gasket damageReplace gasket
Burned gases leakingReplace piston and piston rings or
cylinder body assembly
Oil not reaching valve systemOil passage in cylinder head or
cylinder body cloggedClean or correct
Engine Oil Pressure Check
1. Check for dirt, gasoline or water in the engine oil.
a. Check the viscosity of the oil.
b. Check the viscosity of the oil.
c. Change the oil if the viscosity is outside the
specified standard.
d. Refer to the ªMaintenance and Lubricationº section
of this manual.
2. Check the engine oil level.
The level should fall somewhere between the ªADDº
and the ªFULLº marks on the oil level dipstick.
If the oil level does not reach the ªADDº mark on the
oil level dipstick, engine oil must be added.3. Remove the oil pressure unit.
4. Install an oil pressure gauge.
5. Start the engine and allow the engine to reach normal
operating temperature (About 80
C).
6. Measure the oil pressure.
Oil pressure should be:
392±550 kPa (56.9±80.4 psi) at 3000 rpm.
7. Stop the engine.
8. Remove the oil pressure gauge.
9. Install the oil pressure unit.
10. Start the engine and check for leaks.

6A±18
ENGINE MECHANICAL (6VE1 3.5L)
Malfunction Indicator Lamp
The instrument panel ªCHECK ENGINEº Malfunction In-
dicator Lamp (MIL) illuminates by self diagnostic system
when the system checks the starting of engine, or senses
malfunctions.
Condition
Possible causeCorrection
ªCHECK ENGINEº MIL does not
illuminate at the starting of engine
Bulb defectiveReplace
illuminate at the starting of engineMIL circuit openCorrect or replace
Command signal circuit to operate
self diagnostic system shortedCorrect or replace
Powertrain Control Module (PCM)
cable loosely connected,
disconnected or defectiveCorrect or replace
PCM defectiveReplace
ªCHECK ENGINEº MIL illuminates,
and stays onDeterioration of heated oxygen
sensor internal elementReplace
Heated oxygen sensor connector
terminal improper contactReconnect properly
Heated oxygen sensor lead wire
shortedCorrect
Heated oxygen sensor circuit openCorrect or replace
Deterioration of engine coolant
temperature sensor internal elementReplace
Engine coolant temperature sensor
connector terminal improper contactReconnect properly
Engine coolant temperature sensor
lead wire shortedCorrect
Engine coolant temperature sensor
circuit openCorrect or replace
Throttle position sensor open or
shorted circuitsCorrect or replace
Deterioration of crankshaft position
sensorReplace
Crankshaft position sensor circuit
open or shortedCorrect or replace
Vehicle speed sensor circuit openCorrect or replace
Manifold absolute pressure sensor
circuit open or shortedCorrect or replace
Intake air temperature sensor circuit
open or shortedCorrect or replace
Fuel injector circuit open or shortedCorrect or replace
PCM driver transistor defectiveReplace PCM
Malfunctioning of PCM RAM
(Random Access Memory) or ROM
(Read Only Memory)Replace PCM

6A±19
ENGINE MECHANICAL (6VE1 3.5L)
Cylinder Head Cover LH
Removal
1. Disconnect battery ground cable.
2. Remove engine cover from the dowels on the
common chamber.
F06RY001
3. Disconnect positive crankcase ventilation hose.
4. Remove ground cable fixing bolt on cylinder head
cover.
5. Ignition coil connector and ignition coil.

Disconnect the three connectors from the ignition
coils.

Remove harness bracket bolt on cylinder head
cover.

Remove fixing bolts on ignition coils.
060RY022
Legend
(1) Ignition Coil Connector
(2) Bolt
(3) Ignition Coil Assemblies
6. Disconnect fuel injector harness connector then
remove fuel injector harness bracket bolt.
7. Remove eight fixing bolts, then the cylinder head
cover.
010RW001
NOTE: Where do you refer the tech in case of bolt
removal difficulties.

6A±20
ENGINE MECHANICAL (6VE1 3.5L)
Installation
1. Install cylinder head cover.

Clean the sealing surface of cylinder head and
cylinder head cover to remove oil and sealing
materials completely.

Apply sealant (TB-1207B or equivalent) of bead
diameter 2-3 mm at eight place of arched area of
camshaft bearing cap on front and rear sides.

The cylinder head cover must be installed with in 5
minutes after sealant application to prevent
hardening of sealant.

Tighten bolts to the specified torque.
Torque : 9 N´m (78 lb in)
010RW008
2. Install fuel injection harness bracket and tighten bolt
to the specified torque.
Torque : 9 N´m (78 lb in)
3. Connect ignition coil connector and ignition coil, then
tighten bolt to the specified torque.
Torque : 4 N´m (35 lb in)
060RY022
Legend
(1) Ignition Coil Connector
(2) Bolt
(3) Ignition Coil Assembly
CAUTION: Ignition coil assembly #6 is different
from ignition coil assembly from #1 to #5. Ignition
coil assembly #6 is short type. So, note it when
installing ignition coil assembly of #6.
060RY00002
Legend
(1) Long Type Ignition Coil Assemblies (# 1 ~ # 5)
(2) Short Type Ignition Coil Assembly (# 6)
4. Connect ground cable and tighten bolts to the
specified torque.
Torque : 9 N´m (78 lb in)
5. Install positive crankcase ventilation hose.
6. Install engine cover mating with the dowels.

6A±21
ENGINE MECHANICAL (6VE1 3.5L)
Cylinder Head Cover RH
Removal
1. Disconnect battery ground cable.
2. Remove engine cover from the dowele on the
common chamber.
F06RY001
3. Disconnect ventilation hose from cylinder head cover.
4. Disconnect three ignition coil connectors from ignition
coils and remove harness bracket bolts on cylinder
head cover then remove ignition coil fixing bolts on
ignition coils and remove ignition coils.
5. Disconnect fuel injector harness connector then
remove fuel injector harness bracket bolt.
6. Remove eight fixing bolts then the cylinder head
cover.
010RW002
Installation
1. Install cylinder head cover.

Clean the sealing surface of cylinder head and
cylinder head cover to remove oil and sealing
materials completely.
Apply sealant (TB-1207B or equivalent) bead
(diameter 2-3 mm) at eight places of arched areas
of camshaft bracket on front and rear sides.

The cylinder head cover must be installed within 5
minutes after sealant application to prevent
premature hardening of sealant.

Tighten bolts to the specified torque.
Torque : 9 N´m (78 lb in)
014RW019
2. Tighten fuel injector harness bracket bolts to
specified torque then reconnect fuel injector harness
connector.
Torque : 7.8 N´m (69 lb in)
3. Connect ignition coil connector and tighten ignition
coil fixing bolts to specified torque.
Torque : 4 N´m (35 lb in)
4. Connect ventilation hose to cylinder head.
5. Install engine cover mating with the dowels.

6A±22
ENGINE MECHANICAL (6VE1 3.5L)
Common Chamber
Removal
1. Disconnect battery ground cable.
2. Remove air cleaner duct assembly.
013RY00001
Legend
(1) Positive Crankcase Ventilation Hose Connector
(2) Intake Air Temperature Sensor
(3) Air Cleaner Duct Assembly
(4) Air Flow Sensor
3. Disconnect vacuum booster hose from common
chamber.
4. Disconnect connector from manifold absolute
pressure sensor, Ion sensing module, throttle
position sensor, solenoid valve, electric vacuum
sensing valve, and EGR valve.
5. Disconnect vacuum hose on canister VSV and
positive crankcase ventilation hose, fuel rail
assembly with pressure control valve bracket.
6. Remove ventilation hose from throttle valve and
intake duct and remove water hose.
7. Remove the four throttle body fixing bolts.
8. Remove exhaust gas recirculation valve assembly
fixing bolt and nut on common chamber and remove
EGR valve assembly.9. Remove two bolts from common chamber rear side
to remove fuel hose bracket.
10. Remove common chamber four bolts and four nuts
then remove the common chamber.
025RY002
Legend
(1) Common Chamber
(2) Throttle Valve Assembly
(3) Bolt
Installation
1. Install common chamber and tighten bolts and nuts to
the specified torque.
Torque :
Bolt : 25 N´m (18 lb ft)
Nut : 25 N´m (18 lb ft)
2. Install fuel hose bracket and tighten bolts to specified
torque.
Torque : 10 N´m (87 lb in)
3. Install exhaust gas recirculation valve assembly and
tighten bolt and nut to the specified torque.
Torque : 25 N´m (18 lb ft)
4. Install throttle body and tighten bolts to the specified
torque.
Torque : 25 N´m (18 lb ft)
5. Install ventilating hose to throttle valve and intake
duct.
6. Connect vacuum hoses on canister VSV and positive
crankcase ventilation hose. Tighten bolts for fuel rail
assembly with pressure control valve bracket.
Torque : 25 N´m (18 lb ft)

6A±23
ENGINE MECHANICAL (6VE1 3.5L)
7. Connect each connector.
8. Connect vacuum booster hose.
9. Connect the Ion sensing module connectors as
shown in the illustration.
060RY00111
Legend
(1) Green Connector
(2) Blue Connector
(3) Identification Mark (6VE1 Engine Only)
10. Install air cleaner duct assembly.
013RY00001
Legend
(1) Positive Crankcase Ventilation Hose Connector
(2) Intake Air Temperature Sensor
(3) Air Cleaner Duct Assembly
(4) Mass Air Flow Sensor

6A±24
ENGINE MECHANICAL (6VE1 3.5L)
Exhaust Manifold LH
Removal
1. Disconnect battery ground cable.
2. Disconnect O
2 sensor connector.
3. Remove exhaust front pipe three stud nuts from
exhaust side and two bolts from rear end of exhaust
front pipe.
150R100011
Legend
(1) Exhaust Front Pipe LH
(2) O
2 Sensor
4. Remove exhaust manifold eight fixing nuts and
remove exhaust manifold from the engine.
Installation
1. Install exhaust manifold and tighten exhaust manifold
fixing nuts to the specified torque with new nuts.
Torque: 57 N´m (42 lb ft)
2. Install exhaust front pipe and tighten three stud nuts
and two bolts to the specified torque.
Torque :
Stud nuts: 67 N´m (49 lb ft)
Bolts: 43 N´m (32 lb ft)
150R100011
Legend
(1) O
2 Sensor
(2) Exhaust Front Pipe LH
3. Reconnect O2 sensor connector.

6A±25
ENGINE MECHANICAL (6VE1 3.5L)
Exhaust Manifold RH
Removal
1. Disconnect battery ground cable.
2. Remove torsion bar. Refer to removal procedure in
Front Suspension section.
3. Remove exhaust front pipe three stud nuts and two
bolts then disconnect exhaust front pipe.
150R100013
Legend
(1) Exhaust Front Pipe RH
(2) O
2 Sensor
4. Remove exhaust manifold eight fixing nuts then the
exhaust manifold.
Installation
1. Install exhaust manifold and tighten nuts to the
specified torque.
Torque : 57 N´m (42 lb ft)
2. Install exhaust front pipe and tighten three stud nuts
and two bolts to the specified torque.
Torque:
Stud nuts: 67 N´m (49 lb ft)
Bolts: 43 N´m (32 lb ft)
3. Install the torsion bar and readjust the vehicle height.
Refer to installation and vehicle height adjustment
procedure for front suspension.

6A±26
ENGINE MECHANICAL (6VE1 3.5L)
Crankshaft Pulley
Removal
1. Disconnect battery ground cable.
2. Remove air cleaner assembly.
013RY00001
Legend
(1) Positive Crankcase Ventilation Hose Connector
(2) Intake Air Temperature Sensor
(3) Air Cleaner Duct Assembly
(4) Air Flow Sensor
3. Remove radiator upper fan shroud from radiator.
4. Move serpentine belt tensioner to loose side using
wrench then remove serpentine belt.
850RW001
Legend
(1) Crankshaft Pulley
(2) Cooling Fan Pulley
(3) Tensioner
(4) Generator
(5) Air Conditioner Compressor
(6) Power Steering Oil Pump
(7) Idle Pulley
(8) Driver Belt
5. Remove cooling fan assembly four fixing nuts, then
the cooling fan assembly.
6. Remove crankshaft pulley assembly using J-8614-01
crankshaft holder, hold crankshaft pulley then
remove center bolt and pulley.
Installation
1. Install crankshaft pulley using J-8614-01 crankshaft
holder, hold the crankshaft pulley and tighten center
bolt to the specified torque.
Torque : 167 N´m (123 lb ft)
2. Install cooling fan assembly and tighten bolts/nuts to
the specified torque.
Torque : 22 N´m (16 lb ft) for fan pulley and fan
bracket.
Torque : 7.5 N´m (66.4 lb in) for fan and clutch
assembly.
3. Move serpentine belt tensioner to loose side using
wrench, then install serpentine belt to normal
position.
4. Install radiator upper fan shroud.
5. Install air cleaner assembly.