1998 ISUZU TROOPER Remove engine

6F±5 ENGINE EXHAUST
Three Way Catalytic Converter
Removal
1. Disconnect battery ground cable.
2. Raise the vehicle and support with suitable safety
stands.
3. Remove three way exhaust pipe fixing bolts and nuts.
150RW065
Installation
1. Install three way catalytic converter between three
way exhaust pipe and silencer.
2. Tighten nuts to the specified torque.
Torque
Nuts : 43 N´m (4.4 Kg´m/32 lb ft)

6F±6ENGINE EXHAUST
Exhaust Silencer
Exhaust Silencer and Associated Parts
E06RW031
Legend
(1) Exhaust Silencer
(2) Exhaust Silencer(3) Mounting Rubber
(4) Exhaust Silencer Fixing Nuts
(5) Exhaust Silencer Fixing Bolts
Removal
1. Disconnect battery ground cable.
2. Raise the vehicle and support with suitable safety
stands.
3. Remove exhaust silencer fixing nuts (4) then
disconnect rear exhaust pipe from exhaust silencer.
4. Remove exhaust silencer fixing nuts (5) then
disconnect exhaust silencer from three way exhaust
pipe.
5. Remove exhaust silencer mounting nuts from
chassis side then remove exhaust silencer (1)(2).
Installation
1. Install the exhaust silencer (1)(2) chassis side and
tighten nuts to the specified torque.
Nuts: 16 N´m (1.6 Kg´m/12 lb ft)
2. Install the exhaust silencer and tighten nuts (5) on
front exhaust pipe to specified torque.
Nuts: 43 N´m (4.4 Kg´m/32 lb ft)
3. Install the rear exhaust pipe and tighten fixing nuts on
exhaust silencer to specified torque.
Nuts: 43 N´m (4.4 Kg´m/32 lb ft)

6F±7 ENGINE EXHAUST
Rear Exhaust pipe
Rear Exhaust pipe and Associated Parts
E06RW033
Legend
(1) Mounting Rubber(2) Rear Exhaust Pipe
(3) Rear Exhaust Pipe Fixing Nuts
Removal
1. Disconnect battery ground cable.
2. Raise the vehicle and support with suitable safety
stands.
3. Remove rear exhaust pipe fixing nuts (3), then
disconnect rear exhaust pipe from exhaust silencer.
4. Remove mounting rubber (1).
5. Remove rear exhaust pipe (2).
Installation
1. Install the mounting rubber (1).
2. Install the exhaust pipe (2) and tighten two nuts (3) on
exhaust silencer to specified torque.
Nuts: 43 N´m (4.4 Kg´m/32 lb ft)

6G±3 ENGINE LUBRICATION
Oil Pump
Oil Pump and Associated Parts
051RW005
Legend
(1) Crankshaft Timing Pulley
(2) Crankcase with Oil Pan
(3) Oil Pipe
(4) Oil Strainer
(5) Oil Pump Assembly
(6) Plug
(7) Spring(8) Relief Valve
(9) Oil Pump Cover
(10) Driven Gear
(11) Drive Gear
(12) Oil Seal
(13) O-ring
(14) Oil Pump Body
Oil Pump and Associated Parts
1. Remove crankshaft timing pulley.
2. Remove crankcase with oil pan.
3. Remove oil pipe.
4. Remove oil strainer.5. Remove oil pump assembly.
6. Remove plug.
7. Remove spring.
8. Remove relief valve.
9. Remove oil pump cover.
10. Remove driven gear.

6G±4
ENGINE LUBRICATION
11. Remove drive gear.
12. Remove oil seal.
13. Remove O-ring.
Inspection and Repair
CAUTION: M a k e necessary correction or parts
replacement if wear, damage or any other abnormal
conditions are found during inspection.
Relief Valve (8)

Check to see that the relief valve slides freely.

The oil pump must be replaced if the relief valve does
not slide freely.

Replace the spring and/or the oil pump assembly (5) if
the spring is damaged or badly worn.
051RS002
Body (14) and Gears (10, 11)
The pump assembly must be replaced if one or more of
the conditions below is discovered during inspection.

Badly worn or damaged driven gear (10).

Badly worn drive gear (11) driving face.

Badly scratched or scored body sliding face (14) or
driven gear (10).

Badly worn or damaged gear teeth.
Measure the clearance between the body and the driven
gear with a feeler gauge.
Standard : 0.10 mm±0.18 mm
(0.0039 in.±0.0070 in)
Limit : 0.20mm (0.0079 in)
051RS004

Measure the clearance between the drive gear and
driven gear with a feeler gauge.
Standard : 0.11 mm±0.24 mm
(0.0043 in±0.0094 in)
Limit : 0.35mm (0.0138 in)
051RS003

Measure the side clearance with a precision straight
edge and a feeler gauge.
Clearance
Standard : 0.03 mm±0.09 mm
(0.0011 in±0.0035 in)
Limit : 0.15mm (0.0059 in)

6G±5 ENGINE LUBRICATION
051RS005
Oil Strainer
Check the oil strainer for cracking and scoring. If cracking
and scoring are found, the oil strainer must be replaced.
051RS006
Reassembly
1. Install drive gear (11).
2. Install driven gear (10).
3. Install oil pump cover (9) and first, loosely tighten all of
the attaching screws. Next, tighten the attaching
screws to the specified torque.
Torque : 10 N´m (1.0 Kg´m/89 lb in)
After installation, check that the gear rotates
smoothly.
4. Install relief valve (8) and apply engine oil to the relief
valve and spring (7).
5. Install spring (7).6. Install the plug (6).
Torque : 8 N´m (0.8 Kg´m/69 lb in)
051RS007
7. Install oil pump assembly (5).

Carefully remove any oil from the cylinder body and
the pump. Apply sealant (TB±1207B or equivalent)
to the pump fitting face as shown in illustration. Take
care that sealant is not applied to oil port surfaces.
The oil pump assembly must be installed within 5
minutes after sealant application before the sealant
hardens.
CAUTION: Do not apply an excessive amount of
sealant to the contact surface. Applying too much
sealant will overflow the contact surfaces. This
could cause serious damage to the engine.

Attach oil pump assembly to cylinder body.

Tighten the oil pump fixing bolts.
Torque : 25 N´m (2.5 Kg´m/18 lb´ft)
051RW002

6G±6
ENGINE LUBRICATION
051RW001
Legend
(1) Around Bolt Holes
(2) Around Dowel Pin
8. Install the new oil seal (12). Apply engine oil to the oil
seal lip before installation then use 5±8840±2287±0
oil seal Installer, install oil seal.
015RS001
9. Install oil strainer (4) with O-ring (13).
Torque: 25 N´m (2.5 Kg´m/18 lb ft)
10. Install oil pipe (3) with O-ring (13).
Torque: 25 N´m (2.5 Kg´m/18 lb ft)
11. Install crankcase with oil pan (2).

Remove oil on crankcase mounting surface and dry
the surface.

Apply a proper 4.5 mm (0.7 in) wide bead of sealant
(TB1207C or equivalent) to the crankcase
mounting surface. The bead must be continuous.

The crankcase must be installed within 5 minutes
after sealant application before the sealant
hardens.
Tighten fixing bolts to the specified torque.
Torque : 10 N´m (1.0 Kg´m/89 lb in)
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12. Install crankshaft timing pulley.

6G±7 ENGINE LUBRICATION
Oil Pan and Crankcase
Removal
1. Disconnect battery ground cable.
2. Drain engine oil.
3. Lift vehicle by supporting the frame.
4. Remove front wheels.
5. Remove oil level dipstick from level gauge tube.
6. Remove stone guard.
7. Remove radiator under fan shroud.
8. Remove suspension cross member fixing bolts, 2 pcs
each per side and remove suspension cross member.
9. Remove pitman arm and relay lever assembly, using
the 5±8840±2005±0 remover, remove pitman arm
from the steering unit and remove four fixing bolts for
relay lever assembly.
10. Remove axle housing assembly four fixing bolts from
housing isolator side and mounting bolts from wheel
side. At this time support the axle with a garage jack
and remove axle housing assembly.
11. Remove oil pan fixing bolts.
12. Remove oil pan, using 5±8840±2153±0 sealer cutter,
remove oil pan.
013RS003
13. Remove crankcase fixing bolts.
14. Remove crankcase, using 5±8840±2153±0 sealer
cutter, remove crankcase.
NOTE: Do not deform or damage the flange of oil pan and
crankcase.
Replace the oil pan and/or crankcase if deformed or dam-
aged.
013RS003
Installation
1. Install crankcase.
1. Remove residual sealant, lubricant and moisture
from mounting surface, then dry thoroughly.
2. Properly apply a 4.5 mm (0.7 in) wide bead of
sealant (TB-1207C or equivalent) to mounting
surface of crankcase.
Sealant beat must be continuous.

The crankcase must be installed within 5
minutes after sealant application before the
sealant hardens.
013RW010