1998 ISUZU TROOPER seats

6A – 42 ENGINE MECHANICAL
2. Cylinder head for cracks, especially between valve
seats and in the exhaust ports.
3. Cylinder head deck for corrosion, sand particles in
head and porosity.
CAUTION: Do not attempt to weld the cylinder
head. Replace it.
4. Cylinder head lower surface for flatness.
Use a straight edge and a feeler gauge to measure
the cylinder head lower surface warpage.
If the measured values exceed the specified limit,
the cylinder head must be replaced.
Cylinder Head Lower Face Warpage:
Standard: 0.075 mm (0.0029 in) or less
Limit: 0.2 mm (0.0079 in)
Cylinder Head Height:
Standard: 95 mm (3.740 in)
5. Water jacket sealing plugs seating surfaces.
6. Use a straight edge and a feeler gauge to measure
the manifold cylinder head fitting face warpage.
If the measured values exceed the specified limit,
the manifold must be replaced.
Exhaust Manifold Warpage:
Standard: 0.05 mm (0.0020 in) or less
Limit: 0.20 mm (0.0079 in)
CAUTION: Do not attempt to weld the cylinder
head. Replace it.
REASSEMBLY
1. Cylinder Head
•Refer to “Cylinder Head Gasket”.
2. Glow Plug and Glow Plug Connector
•Tighten glow plugs.
Torque: 15 N·m (1.5 kg·m/11 lb ft)
011RW006
012RW053

6A– 76 ENGINE MECHANICAL
7) Apply plastigage to the crankshaft journal unit as
shown in the illustration.
8) Install the main bearing caps. Apply engine oil to
the bolt threads and the seats. Tighten the bolts
to the specified torque.
Torque: 167 N·m (17 kg·m/123 lb ft)
NOTE: Do not allow the crankshaft to rotate.
9) Remove the main bearing caps.
10) Measure the plastigage width and determine the
oil clearance. If the oil clearance exceeds the
specified limit, replace the main bearings as a
set and/or replace the crankshaft.
11) Clean the plastigage from the bearings and the
crankshaft.
Remove the crankshaft and the bearings.
Standard: 0.031 – 0.063 mm (0.0012 – 0.0025 in)
Limit: 0.11 mm (0.0043 in)3. Run-out
1) Carefully set the crankshaft on the V-blocks.
Slowly rotate the crankshaft and measure the
runout. If the crankshaft runout exceeds the
specified limit, the crankshaft must be replaced.
Standard: 0.05 mm (0.0020 in) or less
Limit: 0.08 mm (0.0031 in)
Measure the diameter and the uneven wear of
main journal and crank pin.
If the crankshaft wear exceeds the specified
limit, crankshaft must be replaced.
Main journal diameter
Standard: 69.917 – 69.932 mm (2.7526 – 2.7532 in)
Limit: 69.91 mm (2.7524 in)
Crank pin diameter
Standard: 52.915 – 52.930 mm (2.0833 – 2.0839 in)
Limit: 52.90 mm (2.0827 in)
Uneven wear limit
Standard: 0.05 mm (0.0020 in) or less
Limit: 0.08 mm (0.0031 in)
014RW055
014RW077
012RW068

LIGHTING SYSTEM8A–1
BODY AND ACCESSORIES
CONTENTS
Lighting System 8A. . . . . . . . . . . . . . . . . . . . . . . . .
Wiper/Washer System 8B. . . . . . . . . . . . . . . . . . .
Entertainment 8C. . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring System 8D. . . . . . . . . . . . . . . . . . . . . . . . . .
Meter and Gauge 8E. . . . . . . . . . . . . . . . . . . . . . . Body Structure 8F. . . . . . . . . . . . . . . . . . . . . . . . . .
Seats 8G. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Security and Locks 8H. . . . . . . . . . . . . . . . . . . . . .
Sun Roof/Convertible Top 8I. . . . . . . . . . . . . . . .
Exterior/Interior Trim 8J. . . . . . . . . . . . . . . . . . . . .
LIGHTING SYSTEM
CONTENTS
Service Precaution 8A–2. . . . . . . . . . . . . . . . . . . . . .
Headlight Bulb 8A–3. . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlight 8A–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlight and Associated Parts 8A–4. . . . . . . . .
Removal 8A–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlight Adjustment 8A–4. . . . . . . . . . . . . . . . . .
Fog Light Bulb 8A–5. . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fog Light Assembly 8A–6. . . . . . . . . . . . . . . . . . . . .
Removal 8A–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fog Light Adjustment 8A–6. . . . . . . . . . . . . . . . . .
Clarence Light Bulb 8A–6. . . . . . . . . . . . . . . . . . . . . .
Removal 8A–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Fog Light Bulb (RHD) 8A–7. . . . . . . . . . . . . . .
Removal 8A–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillight Bulb (Body) 8A–7. . . . . . . . . . . . . . . . . . . . .
Removal 8A–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillight Bulb (Bumper) 8A–8. . . . . . . . . . . . . . . . . . .
Removal 8A–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
License Plate Light Bulb (Body) 8A–8. . . . . . . . . . .
Removal 8A–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
License Plate Light Bulb (Bumper) 8A–9. . . . . . . . .
Removal 8A–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–9. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stoplight Bulb 8A–9. . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal and Installation 8A–9. . . . . . . . . . . . . . . High Mount Stoplight 8A–10. . . . . . . . . . . . . . . . . . . .
Removal 8A–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–10. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Turn Signal Light Bulb 8A–10. . . . . . . . . . . . . .
Removal 8A–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–10. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Side Turn Signal Light Bulb 8A–11. . . . . . . . . . . . . . .
Removal 8A–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–11. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Turn Signal Light Bulb 8A–11. . . . . . . . . . . . . .
Removal 8A–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–11. . . . . . . . . . . . . . . . . . . . . . . . . . .
Backup Light Bulb 8A–12. . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–12. . . . . . . . . . . . . . . . . . . . . . . . . . .
Dome Light Bulb 8A–12. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–12. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Luggage Room Light Bulb 8A–13. . . . . . . . . . . . . . . .
Removal 8A–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–13. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Courtesy Light Bulb 8A–13. . . . . . . . . . . . . . . . . . . . . .
Removal 8A–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–13. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Map Light Switch/Bulb 8A–14. . . . . . . . . . . . . . . . . . .
Removal 8A–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–14. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cigarette Lighter Illumination Bulb 8A–14. . . . . . . . .
Removal 8A–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–14. . . . . . . . . . . . . . . . . . . . . . . . . . .
Ashtray Illumination Bulb 8A–15. . . . . . . . . . . . . . . . .
Removal 8A–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–15. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glove Box Illumination Bulb 8A–15. . . . . . . . . . . . . . .
Removal 8A–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–15. . . . . . . . . . . . . . . . . . . . . . . . . . . .

WIRING SYSTEM 8D – 493
Seat Heater
General Description
The circuit consists of seat heater switch and seat
heater unit.
Seat heater unit is incorporated into front seats.
To prevent from being overheated, seat heater unit
has thermostat.

SEATS8G±1
BODY AND ACCESSORIES
SEATS
CONTENTS
Service Precaution 8G±1. . . . . . . . . . . . . . . . . . . . . .
Front Seat Assembly 8G±2. . . . . . . . . . . . . . . . . . . .
Front Seat Assembly and Associated
Parts 8G±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8G±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8G±3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembled View (Long Wheel Base) 8G±3. .
Disassembly 8G±4. . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly 8G±5. . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembled View (Short Wheel Base) 8G±6. .
Disassembly 8G±6. . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly 8G±8. . . . . . . . . . . . . . . . . . . . . . . . . .
Power Seat Assembly 8G±9. . . . . . . . . . . . . . . . . . .
General Description 8G±9. . . . . . . . . . . . . . . . . . . . . .
Disassembled View 8G±9. . . . . . . . . . . . . . . . . . . .
Disassembly 8G±10. . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly 8G±12. . . . . . . . . . . . . . . . . . . . . . . . . .
Power Seat Switch 8G±12. . . . . . . . . . . . . . . . . . . . . .
Removal 8G±12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8G±12. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Tilt Motor / Rear Tilt Motor /
Slide Motor / Recliner Motor 8G±13. . . . . . . . . . . . . .
Parts Location 8G±13. . . . . . . . . . . . . . . . . . . . . . . .
Removal and Installation 8G±13. . . . . . . . . . . . . . .
Seat Heater System 8G±14. . . . . . . . . . . . . . . . . . . . .
General Description 8G±14. . . . . . . . . . . . . . . . . . . . . .
Seat Heater Switch Removal and
Installation 8G±14. . . . . . . . . . . . . . . . . . . . . . . . . . . Heat Unit Parts Location 8G±14. . . . . . . . . . . . . . . .
Heat Unit Removal and Installation 8G±14. . . . . .
Rear Seat Assembly 8G±15. . . . . . . . . . . . . . . . . . . . .
Rear Seat Assembly and Associated Parts 8G±15
Removal 8G±15. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8G±15. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembled View (Split Type) 8G±16. . . . . . . . .
Disassembly (Split Type) 8G±17. . . . . . . . . . . . . . .
Reassembly (Split Type) 8G±18. . . . . . . . . . . . . . . .
Disassembled View (Short Wheel Base) 8G±19. .
Disassembly 8G±19. . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly 8G±20. . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembled View (Bench Type) 8G±21. . . . . . .
Disassembly (Bench Type) 8G±22. . . . . . . . . . . . .
Reassembly (Bench Type) 8G±23. . . . . . . . . . . . . .
Third Seat Assembly 8G±23. . . . . . . . . . . . . . . . . . . . .
Parts Location 8G±23. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8G±23. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8G±24. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembled View 8G±24. . . . . . . . . . . . . . . . . . . .
Disassembly 8G±25. . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly 8G±25. . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Seat Foot Rest 8G±25. . . . . . . . . . . . . . . . . . . . .
Rear Seat Foot Rest and Associated Parts 8G±25
Removal 8G±26. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8G±26. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data and Specifications 8G±26. . . . . . . . . . . . .
Service Precaution
WARNING: I F S O E Q U IPPED WITH A
SUPPLEMENTAL RESTRAINT SYSTEM (SRS),
REFER TO THE SRS COMPONENT AND WIRING
LOCATION VIEW IN ORDER TO DETERMINE
WHETHER YOU ARE PERFORMING SERVICE ON OR
NEAR THE SRS COMPONENTS OR THE SRS
WIRING. WHEN YOU ARE PERFORMING SERVICE
ON OR NEAR THE SRS COMPONENTS OR THE SRS
WIRING, REFER TO THE SRS SERVICE
INFORMATION. FAILURE TO FOLLOW WARNINGS
COULD RESULT IN POSSIBLE AIR BAG
DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts and
systems.

8G±2SEATS
Front Seat Assembly
Front Seat Assembly and Associated Parts
750RX016
Legend
(1) Rear Cover
(2) Front Seat Assembly
(3) Seat Belt Warning Connector/Pretensioner
Harness Connector
(4) Rear Seat Foot Rest (L´W´B)(5) Seat Rail Cover (S´W´B)
(6) Door Sill Plate
(7) Riser Cover (L´W´B)
(8) Seat Slide Cover (S´W´B)
(9) Front Cover
(10) Seat Rail Cover and Hole Cover (S´W´B)
Removal
1. Disconnect the battery ground cable.
2. Remove the front cover.
3. Remove the rear cover.

Remove the cover fixing screw from the rear inner
cover, if this model is equipped with the power
seats.
4. Remove the door sill plate.5. Remove the rear seat foot rest.

Refer to the Rear Seat Foot Rest in this section.
6. Remove the riser cover.
7. Remove the seat belt warning connector (Driver's
side only) or pretensioner harness connector.
8. Remove the front seat assembly.

Disconnect the power seat connector, if this model
is equipped with the power seats.

SEATS8G±3
Installation
To install, follow the removal steps in the reverse order,
noting the following points:1. Tighten the front seat assembly fixing bolts to the
specified torque.
Torque: 40 N´m (4.1 kg´m/30 lb ft)
2. Install the longest bolt to the rear inner side fixing
location, if this model is equipped with power seats.
Disassembled View (Long Wheel Base)
750RX017
Legend
(1) Head Rest
(2) Seat Back Assembly
(3) Back Board Assembly
(4) Guide Holder
(5) Trim Cover
(6) Pad & Frame Assembly
(7) Seat Heater Assembly
(8) Reclining Device
(9) Slide Cover
(10) Reclining Knob
(11) Dial (W/Height Adjuster)
(12) Frame Assembly(13) Seat Heater Assembly
(14) Pad Assembly
(15) Trim Cover
(16) Spacer (W/O Height Adjuster)
(17) Release Wire
(18) Seat Adjuster/Seat Adjuster (W/Pretensioner)
(19) Seat Belt Buckle Assembly
(20) Height Adjuster
(21) Seat Cushion Assembly
(22) Hinge Cover
(23) Pad & Frame Assembly
(24) Trim Cover
(25) Armrest Assembly

8G±4SEATS
Disassembly
1. Remove the head rest.
2. Remove the reclining knob.
3. Remove the dial(1) (W/height adjuster).

Remove the side cover fixing screws and the dial
lock spring(2).
750RW025
4. Remove the side cover.
5. Remove the armrest assembly.

Open the armrest fastener and remove the armrest
fixing bolt.
750RS004
6. Remove the trim cover.
7. Remove the pad and frame assembly.
8. Remove the hinge cover.
9. Remove the back board assembly(3).

Pull out the back board while prying the clip (4) of
the back board free from the seat back assembly.
750RW032
10. Remove the reclining device.

Turn up the seat back trim cover in order to remove
the reclining device fixing bolts.
750RS006