Isuzu Trooper (1998-2002 year). Manual - part 383

6A–62

ENGINE MECHANICAL (6VE1 3.5L)

3. Place the camshaft on V–blocks.

Slowly rotate the camshaft and measure the runout
with a dial indicator.
Replace the camshaft if the runout exceeds the
specified limit.

Runout
Limit : 0.1 mm (0.0039 in)

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4. Measure the camshaft journal oil clearance.

1. Measure the camshaft bracket housing inside

diameter.

NOTE: Tighten camshaft bracket (2) to specified torque
before measuring the camshaft bracket inside diameter.

Torque : 10 N·m (1.0 kg·m/87 lb in)

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2. Subtract the camshaft outside diameter from the

camshaft bracket housing inside diameter.

Oil Clearance
Standard : 0.027 mm–0.078 mm

(0.0011 in–0.0031 in)

Limit : 0.11 mm (0.0043 in)

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5. Replace the cylinder head and/or camshaft if the

measured oil clearance exceeds the specified limit.
1. Carefully clean the camshaft journal, the

camshaft bracket, and the cylinder head.

2. Install camshaft assembly and camshaft brackets

(2), tighten twenty bolts (1) on one side bank to
the specified torque.

Torque: 10 N·m (1.0 kg·m/87 lb in)

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6A–63

ENGINE MECHANICAL (6VE1 3.5L)

3. Measure the camshaft thrust clearance with a dial

indicator. Replace the camshaft and/or the
cylinder head if the camshaft thrust clearance
exceeds the specified limit.

Camshaft thrust Clearance
Standard : 0.03 mm–0.08 mm

(0.0012 in.–0.0031 in.)

Limit : 0.12 mm (0.0047 mm)

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Reassembly

1. Install camshaft drive gear assembly and tighten

three bolts to specified torque.

Torque: 10 N·m (1.0 kg·m/87 lb in)

2. Install the spring ; camshaft gear(1) into the camshaft

assembly.
Ensure the clearance is between the right side of the
spring; camshaft gear (1) and the dowel pin (2).

014R100017

3. Align the dowel pin on the sub gear to the clearance of

the spring ; camshaft gear made in step 2 and install
the sub gear (3).

4. Install the wave washer (2). Use snap ring pliers to

install the snap ring (1).

014R100018

5. Tighten sub gear setting bolt.

a. Use 5-8840-2443-0 gear spring lever to pre-load

the sub gear. Turn the sub gear in a clockwise
direction until the M5 bolt hole aligns with the hole
in the camshaft driven gear.

b. Install the M5 bolt and tighten to a suitable torque to

prevent the sub gear from moving.

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6. Align the timing mark on the retainer and dowel pin of

the camshaft drive gear.

7. Install camshaft assembly and camshaft brackets,

tighten twenty bolts on one side bank to the specified
torque.

6A–64

ENGINE MECHANICAL (6VE1 3.5L)

a. Apply engine oil to camshaft journal and bearing

surface of camshaft bracket.

b. Align timing mark on intake camshaft (one dot for

right bank, two dots for left bank) and exhaust
camshaft (one dot for right bank, two dots for left
bank) to timing mark on camshaft drive gear (one
dot).

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Legend

(1) Alignment Mark on the Camshaft Gear
(2) Alignment Mark on the Camshaft Drive Gear

014R100025

Legend

(1) Discrimination Mark for Right Bank Intake

Camshaft Gear

(2) Alignment Mark for Right Bank (One Dot)
(3) Camshaft Timing Gear for Right Bank Intake

014R100026

Legend

(1) Alignment Mark for Left Bank (Two Dots)
(2) Discrimination Mark for Left Bank Intake

Camshaft Gear

(3) Camshaft Timing Gear for Left Bank Intake

014R100027

Legend

(1) Discrimination Mark

LE : Left Bank Exhaust
RE : Right Bank Exhaust

(2) Alignment Mark

One Dot for Right Bank
Two Dots for Left Bank

(3) Camshaft Timing Gear for Exhaust

6A–65

ENGINE MECHANICAL (6VE1 3.5L)

014R100023

Legend

(1) Timing Mark on the Camshaft Drive Gear for

Right Bank Exhaust Camshaft

(2) Timing Mark on the Camshaft Drive Gear for

Right Bank Intake Camshaft

(3) Dowel Pin

014R100024

Legend

(1) Timing Mark on the Camshaft Drive Gear for

Left Bank Intake Camshaft

(2) Timing Mark on the Camshaft Drive Gear for

Left Bank Exhaust Camshaft

(3) Dowel Pin

c. Tighten twenty bolts in numerical order on one side

bank as shown in the illustration.

Torque: 10 N·m (1.0 kg·m/87 lb in)

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8. If the oil seal requires replacement, use the

5-8840-2445-0 to install the oil seal.

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