Isuzu Trooper (1998-2002 year). Manual - part 374

6A–26

ENGINE MECHANICAL (6VE1 3.5L)

Nuts: 57 N·m (5.8 kg·m/42 lb ft)

5. Reconnect O

2

 Sensor harness connector.

6. Install the torsion bar and readjust the vehicle height.

Refer to installation and vehicle height adjustment
procedure for Front Suspension.

7. Install front propeller shaft.

Refer to installation procedue in Front suspension
section.

8. Install 3rd crossmember.
9. Install transfer case skid plate.

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.

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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

5-8840-0133-0 crankshaft holder, hold crankshaft
pulley then remove center bolt and pulley.

Installation

1. Install crankshaft pulley using 5-8840-0133-0

crankshaft holder, hold the crankshaft pulley and
tighten center bolt to the specified torque.

Torque : 167 N·m (17.0 kg·m/123 lb ft)

2. Install cooling fan assembly and tighten bolts/nuts to

the specified torque.

Torque : 22 N·m (2.2 kg·m/16 lb ft) for fan pulley
and fan bracket.

Torque : 10 N·m (1.0 kg·m/87 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.

6A–27

ENGINE MECHANICAL (6VE1 3.5L)

Timing Belt

Removal

1. Disconnect battery ground cable.
2. Remove air cleaner assembly.
3. Remove radiator upper fan shroud from radiator.
4. Move drive belt tensioner to loose side using wrench

then remove drive 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) Drive Belt

5. Remove cooling fan assembly four nuts, then the

cooling fan assembly.

6. Remove cooling fan drive pulley assembly.
7. Remove idle pulley assembly.
8. Remove serpentine belt tensioner assembly.
9. Remove power steering pump assembly.

10. Remove crankshaft pulley assembly using

5-8840-0133-0 crankshaft holder, hold crankshaft
pulley remove center bolt, then the pulley.

11. Remove right side timing belt cover then left side

timing belt cover.

12. Remove lower timing belt cover
13. Remove pusher.

CAUTION: The pusher prevents air from entering
the oil chamber. Its rod must always be facing
upward.

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Legend

(1) Up Side
(2) Down Side
(3) Direction For Installation
(4) Locking Pin
(5) Apply a force of 980 N (220 lb) when

compressing the pusher rod.

14. Remove timing belt.

CAUTION:
1. Do not bend or twist the belt, otherwise its core

could be damaged. The belt should not be bent at
a radius less than 30 mm (1.1811 in).

2. Do not allow oil or other chemical substances to

come in contact with the belt. They will shorten
the life.

3. Do not attempt to pry or stretch the belt with a

screw driver or any other tool during installation.

4. Store timing belt in a cool and dark place. Never

expose the belt direct sunlight or heat.

6A–28

ENGINE MECHANICAL (6VE1 3.5L)

Installation

NOTE: For correct belt installation, the letter on the belt
must be able to be read as viewed from the front of the
vehicle.

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Legend

(1) Crankshaft Timing Pulley
(2) RH Bank Camshaft Drive Gear Pulley
(3) Water Pump Pulley
(4) Idle Pulley
(5) LH Bank Camshaft Drive Gear Pulley
(6) Tension Pulley
(7) Alignment Mark on Oil Pump.
(8) Alignment Mark on Timing Belt

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Legend

(1) Timing Belt
(2) Engine Rotation Direction
(3) Cylinder Head Side

1. Install timing belt.

1. Align groove of crankshaft timing pulley (2) with

mark on oil pump (1).
Align the mark on the crankshaft timing pulley (3)
with alignment mark (white dotted line) on the tim-
ing belt (4).
Secure the belt with a double clip or equivalent
clip.

NOTE: When timing marks are aligned, No.2 piston will
be on Top Dead Center.

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Legend

(1) Alignment Mark on Oil Pump
(2) Groove on Crankshaft Timing Pulley
(3) Alignment Mark on Crankshaft Timing Pulley
(4) Alignment Mark on Timing Belt

2. Align the alignment mark on the RH bank

camshaft drive pulley (2) to the alignment mark of
the cylinder head cover RH (3).
The camshaft pulley is not 1:1 with the camshafts.
It is necessary to rotate the camshaft pulley until
the camshaft lobes are in the position as shown
in the diagram on page 6A–34.
The camshaft pulley alignment mark should also
align with alignment mark on the cylinder head
cover.
It may require up to four revolutions of the cam-
shaft pulley to achieve alignment of all marks.

6A–29

ENGINE MECHANICAL (6VE1 3.5L)

3. Align the alignment mark (white line) on the timing

belt (1) with alignment mark on the RH bank
camshaft drive pulley (2) (on the left side as
viewed from the front of the vehicle) and put the
timing belt on the camshaft drive pulley.
Secure the belt with a double clip or equivalent
clip.

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Legend

(1) Alignment Mark on Timing Belt (White line).
(2) Alignment Mark on Camshaft Drive Pulley.
(3) Alignment Mark on Cylinder Head Cover RH.

4. Align the alignment mark on the LH bank

camshaft drive pulley (2) to the alignment mark of
the cylinder head cover LH (3).
The camshaft pulley is not 1:1 with the camshafts.
It is necessary to rotate the camshaft pulley until
the camshaft lobes are in the position as shown
in the diagram on page 6A–34.
The camshaft pulley alignment mark should also
align with alignment mark on the cylinder head
cover.
It may require up to four revolutions of the cam-
shaft pulley to achieve alignment of all marks.

5. Align the alignment mark (white line) on the timing

belt (1) with the alignment mark on the LH bank
camshaft drive pulley (2).
When aligning the timing marks, use a wrench to
turn the camshaft drive pulley, then set the timing
mark between timing belt and camshaft drive
pulley and put the timing belt on the camshaft
drive pulley.
Secure the belt with a double clip or equivalent
clip.

NOTE: It is recommended for easy installation that the
belt be secured with a double clip or equivalent clips after
it is installed to each pulley.

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Legend

(1) Alignment Mark on Timing Belt (White line).
(2) Alignment Mark on Camshaft Drive Pulley.
(3) Alignment Mark on Cylinder Head Cover LH.

6. Install crankshaft pulley temporarily and tighten

center bolt by hand (do not use a wrench).
Turn the crankshaft pulley clockwise to give some
belt slack between the crankshaft timing pulley
and the RH bank camshaft drive pulley.

2. Install pusher and tighten bolt to the specified torque.

Torque : 25 N·m (2.5 kg·m/18 lb ft)

1. Install the pusher while pushing the tension pulley

to the belt.

2. Pull out pin from the pusher.

NOTE: When reusing the pusher, press the pusher with
approximately 980 N (100 kgf/220 lb) to retract the rod,
and insert a pin (1.4 mm (0.055 in) piano wire).