1998 ISUZU TROOPER sensor

6A±18
ENGINE MECHANICAL
Cylinder Head Cover LH
Removal
1. Disconnect battery ground cable.
2. Drain engine coolant from faucet bottom of radiator.
3. Remove engine cover from the dowels on the
common chamber.
F06RW018
4. Remove air cleaner duct assembly (3) and air cleaner
element (4).
130RW001
Legend
(1) Positive Crankcase Ventilation Hose Connector
(2) Intake Air Temperature Sensor
(3) Air Cleaner Duct Assembly
(4) Air Cleaner Element
(5) Mass Air Flow Sensor
NOTE: Disconnect the mass air flow (MAF) sensor
connector, intake air temperature (IAT) sensor connector,
and positive crankcase ventilation (PCV) hose before
hand the air cleaner duct assembly is removed.5. Disconnect following wiring connectors and bonding
cable:

Manifold Absolute Pressure (MAP) sensor

Vacuum Switching Valve (VSV) for Induction Air
Control Valve (IACV) actuator

Ignition coils for left bank

Fuel injectors for left bank

Idle air control (IAC) valve

Throttle position sensor (TPS)

Bonding cable

Others as necessitated
6. Disconnect following vacuum hoses:

Brake master VAC

Canister

VSV for IACV actuator

Duty solenoid valve

PCV
7. Disconnect radiator upper and lower hoses
8. Remove engine harness from the cylinder head
cover.
9. Remove the upper fan guide.
10. Remove cooling fan and clutch assembly.
11. Remove drive belt by pushing down the auto
tensioner using spanner as illustrated.
F06RW019

6A±20
ENGINE MECHANICAL
5. Install auto tensioner assembly and tighten the fixing
bolts to the specified torque.
Torque :
Shorter Bolt : 20 N´m (2.0 Kg´m/14 lb ft)
Longer Bolt : 39 N´m (4.0 Kg´m/29 lb ft)
6. Install idle pulley and bracket assembly and tighten
the fixing bolt to the specified torque.
Torque : 52 N´m (5.3 Kg´m/38 lb ft)
7. Install fan pulley and bracket assembly and tighten
the fixing bolts and nut to the specified torque.
Torque : 22 N´m (2.2 Kg´m/16 lb ft)
8. Install power steering oil pump pulley and tighten the
fixing bolt to the specified torque.
Torque : 78 N´m (8.0 Kg´m/58 lb ft)
9. Install drive belt by pushing down the auto tensioner
using spanner as shown in the removal step of drive
belt.
10. Install cooling fan and clutch assembly and tighten
the fixing bolts to the specified torque.
Torque : 10 N´m (1.0 Kg´m/87 lb in)
11. Install upper fan guide and clip both side and tighten
the fixing bolts to the specified torque.
Torque : 4 N´m (0.4 Kg´m/35 lb in)
12. Install engine harness and tighten the fixing bolts of
the retaining clip and bracket to the specified torque.
Torque : 4 N´m (0.4 Kg´m/35 lb in)
13. Connect radiator upper and lower hoses and clip
them securely.
14. Connect vacuum hoses of those which were
disconnected in the removal step.
15. Connect wiring connectors and bonding cable of
those which were disconnected in the removal step.
16. Install air cleaner element and air cleaner duct
assembly, and clip the both end securely.
17. Connect MAF sensor connector, IAT sensor
connector and PCV hose.
18. Install engine cover mating with the dowels.

6A±21
ENGINE MECHANICAL
Cylinder Head Cover RH
Removal
1. Disconnect battery ground cable.
2. Remove battery from the vehicle.
3. Drain engine coolant from faucet bottom of radiator.
4. Remove engine cover from the dowels on the
common chamber.
F06RW018
5. Remove air cleaner duct assembly (3) and air cleaner
element (4).
130RW001
Legend
(1) Positive Crankcase Ventilation Hose Connector
(2) Intake Air Temperature Sensor
(3) Air Cleaner Duct Assembly
(4) Air Cleaner Element
(5) Mass Air Flow Sensor
NOTE: Disconnect the mass air flow (MAF) sensor
connector, intake air temperature (IAT) sensor connector,
and positive crankcase ventilation (PCV) hose before
hand the air cleaner duct assembly is removed.
6. Disconnect following wiring connectors and bonding
cable:

Exhaust Gas Recirculation (EGR) valve

Fuel injectors for right bank

Ignition coils for right bank

Bonding cable

Othres as necessitated
7. Disconnect radiator upper and lower hoses.
8. Remove engine harness from the cylinder head
cover.
9. Remove the upper fan guide.
10. Remove cooling fan and clutch assembly.
11. Remove drive belt by pushing down the auto
tensioner using spanner as illustrated.
F06RW019
Legend
(1) Crankshaft Pulley
(2) Generator
(3) Auto Tensioner
(4) Idle Pulley
(5) Cooling Fan Pulley
(6) Power Steering Oil Pump
(7) Drive Belt
(8) Air Conditioner Compressor
12. Remove fan pulley and bracket assembly.
13. Remove idle pulley assembly.
14. Remove auto tensioner assembly.
15. Remove crankshaft pulley using 5±8840±0133±0
crankshaft holder.

6A±23
ENGINE MECHANICAL
6. Install idle pulley assembly and tighten the fixing bolt
to the specified torque.
Torque : 52 N´m (5.3 Kg´m/38.4 lb ft)
7. Install fan pulley and bracket assembly and tighten
the fixing bolts and nut to the specified torque.
Torque : 22 N´m (2.2 Kg´m/16.2 lb ft)
8. Install drive belt by pushing down the auto tensioner
using spanner as shown in the removal step of drive
belt.
9. Install cooling fan clutch assembly and tighten the
fixing bolts to the specified torque.
Torque : 10 N´m (1.0 Kg´m/88.5 lb in)
10. Install upper fan guide and clip both side and tighten
the fixing bolts to the specified torque.
Torque : 4 N´m (0.4 Kg´m/35.4 lb in)
11. Install engine harness and tighten the fixing bolts of
the retaining clip and brackets to the specified torque.
Torque : 4 N´m (0.4 Kg´m/35.4 lb in)
12. Connect radiator upper and lower hoses and clip
them securely.
13. Connect wiring connectors and bonding cable of
those which were disconnected in the removal step.
14. Install air cleaner element and air cleaner duct
assembly, and the clip both end securely.
15. Connect MAF sensor connector, IAT sensor
connector and PCV hose.
16. Install engine cover mating with the dowels.

6A±24
ENGINE MECHANICAL
Common Chamber
Removal
1. Disconnect battery ground cable.
2. Remove air cleaner duct assembly.
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Legend
(1) Positive Crankcase Ventilation Hose Connector
(2) Intake Air Temperature Sensor
(3) Air Cleaner Duct Assembly
(4) Air Cleaner Element
(5) Air Flow Sensor
3. Disconnect accelerator pedal cable from throttle body
and cable bracket.
4. Disconnect vacuum booster hose from common
chamber.
5. Disconnect connector from manifold absolute
pressure sensor, idle air control valve, throttle
position sensor, solenoid valve, electric vacuum
sensing valve, and EGR valve.
6. Disconnect vacuum hose on canister VSV and
positive crankcase ventilation hose, fuel rail
assembly with pressure control valve bracket.
7. Remove ventilation hose from throttle valve and
intake duct and remove water hose.
8. Remove the four throttle body fixing bolts.
9. Remove exhaust gas recirculation valve assembly
fixing bolt and nut on common chamber and remove
EGR valve assembly.
10. Remove two bolts from common chamber rear side
for remove fuel hose bracket.
11. Remove common chamber four bolts and four nuts
then remove the common chamber.
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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 (2.5 Kg´m/18 lb ft)
Nut : 25 N´m (2.5 Kg´m/18 lb ft)
2. Install fuel hose bracket and tighten bolts to specified
torque.
Torque : 10 N´m (1.0 Kg´m/89 lb in)
3. Install exhaust gas recirculation valve assembly and
tighten bolt and nut to the specified torque.
Torque : 25 N´m (2.5 Kg´m/18 lb ft)
4. Install throttle body and tighten bolts to the specified
torque.
Torque : 25 N´m (2.5 Kg´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 (2.5 Kg´m/18 lb ft)
7. Connect each connector without fail.
8. Connect vacuum booster hose.
9. Connect accelerator pedal cable.
Accelerator pedal cable adjustment
1. Loosen the adjusting nut and screw cap.
2. Pull outer cable while fully closing the throttle
valve.

6A±25
ENGINE MECHANICAL
3. Tighten adjusting nut and lock nut temporarily.
4. Loosen adjusting nut by three turns and tighten
lock nut.
Then manually operating the throttle valve, make
sure that the valve lever returns up to the stopper
screw.
If it does not reach the stopper screw, repeat from
step 1.
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Legend
(1) Clearance
(2) Lock Nut
(3) Adjusting Nut
10. Install air cleaner duct assembly.
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Legend
(1) Positive Crankcase Ventilation Hose Connector
(2) Intake Air Temperature Sensor
(3) Air Cleaner Duct Assembly
(4) Air Cleaner Element.
(5) Mass Air Flow Sensor

6A±26
ENGINE MECHANICAL
Exhaust Manifold LH
Removal
1. Disconnect battery ground cable.
2. Remove air cleaner duct assembly.
130RW001
Legend
(1) Positive Crankcase Ventilation Hose Connector
(2) Intake Air Temperature Sensor
(3) Air Cleaner Duct Assembly
(4) Air Cleaner Element
(5) Mass Air Flow Sensor
3. Remove exhaust front pipe three stud nuts from
exhaust side and two nuts from rear end of exhaust
front pipe.
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Legend
(1) Exhaust Front Pipe LH
4. Remove heat protector two fixing bolts then the heat
protector.5. Remove a bolt on engine LH side for air conditioner
(A/C) compressor bracket and loosen two bolts for
A/C compressor then move A/C compressor to front
side.
6. 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 (5.8 Kg´m/42 lb ft)
2. Install heat protector.
3. Install exhaust front pipe and tighten three stud nuts
and two nuts to the specified torque.
Torque :
Stud nuts: 67 N´m (6.8 Kg´m/49 lb ft)
Nuts: 43 N´m (4.4 Kg´m/32 lb ft)
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Legend
(1) Exhaust Front Pipe LH
4. Set A/C compressor to normal position and tighten
two bolts and a bolt to the specified torque.
Torque : 40 N´m (4.1 Kg´m/30 lb ft)
5. Install air cleaner duct assembly.

6A±27
ENGINE MECHANICAL
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
nuts then disconnect exhaust front pipe.
150RW061
Legend
(1) Exhaust Front Pipe RH
(2) O
2 Sensor (for IGM)
4. Remove heat protector two fixing bolts then the heat
protector.
5. Remove exhaust gas recirculation (EGR) pipe fixing
bolt and nut from exhaust manifold, remove a nut
from EGR valve and a bolt from rear side of cylinder
head for bracket of EGR pipe then remove the EGR
pipe.
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Legend
(1) Exhaust Gas Recirculation (EGR) Valve
(2) EGR Pipe
6. Remove exhaust manifold eight fixing nuts then the
exhaust manifold.
Installation
1. Install exhaust manifold and tighten bolts to the
specified torque.
Torque : 57 N´m (5.8 Kg´m/42 lb ft)
2. Install the EGR pipe, tighten bolt and nut on exhaust
manifold to specified torque.
Torque : 28 N´m (2.9 Kg´m/21 lb ft)
Tighten nut to EGR valve to the specified torque.
Torque : 44 N´m (4.5 Kg´m/33 lb ft)
Tighten the bolt for EGR pipe bracket to specified
torque.
Torque : 25 N´m (2.5 Kg´m/18 lb ft)
3. Install heat protector
4. Install exhaust front pipe and tighten three stud nuts
and two nuts to the specified torque.
Torque:
Stud nuts: 67 N´m (6.8 Kg´m/49 lb ft)
Nuts: 43 N´m (4.4 Kg´m/32 lb ft)
5. Install the torsion bar and readjust the vehicle height.
Refer to installation and vehicle height adjustment
procedure for Front Suspension.