Isuzu KB P190. Manual — part 745

Engine Mechanical – V6

Page 6A1–203

Page 6A1–203

Left-hand Side

1

Remove the left-hand cylinder head camshaft sprockets, refer to

3.18 Camshaft Sprocket

.

N O T E

Tool No. EN-46105–1 was installed as part of the
left-hand cylinder head camshaft sprocket
removal procedure.

2

Remove Tool No. EN-46105–1 (1) from the left-hand
camshafts.

N O T E

Tool No. EN-46105 was installed as part of the
left-hand cylinder head camshaft position
actuator removal procedure.

Figure 6A1 – 332

3

Observe the markings (1) on the bearing caps. Each
bearing cap is marked in order to identify its location.
The markings have the following meanings:
•

The raised feature must always be oriented
toward the centre of the cylinder head.

•

An I indicates the intake camshaft.

•

An E indicates the exhaust camshaft.

•

The number indicates the journal position from
the front of the engine.

Figure 6A1 – 333

Engine Mechanical – V6

Page 6A1–204

Page 6A1–204

4

Remove the camshaft bearing cap bolts (1) and
caps (2).

Figure 6A1 – 334

5

Remove the camshafts (1).

Figure 6A1 – 335

Clean

1

Clean the camshaft in solvent.

Safety glasses must be worn when using
compressed air.

2

Dry the camshaft with compressed air.

Engine Mechanical – V6

Page 6A1–205

Page 6A1–205

Inspect

Camshaft Visual Inspection

1

Inspect the threaded hole (2) for damage.

2

Inspect the camshaft sprocket locating notch (3) for
damage or wear.

3

Inspect the camshaft sealing grooves (4) for damage.

4

Inspect the camshaft thrust surface (5) for damage.

5

Inspect the camshaft lobes (6) and journals (7) for the
following conditions:
•

Excessive scoring or pitting

•

Discoloration from overheating

•

Deformation from excessive wear, especially
the camshaft lobes

6

If any of the above conditions exist on the camshaft,
replace the camshaft.

Figure 6A1 – 336

Camshaft Measurement

1

With the camshaft (1) in a suitable fixture (2),
measure the camshaft for wear.

2

For camshaft measurement, refer to the following
specifications,

5 Specifications

.

N O T E

If the camshaft measures outside the specified
range, replace the camshaft.

CAUTION

No machining of the camshaft is allowed.

Figure 6A1 – 337

3

Measure the camshaft (2) journals for diameter and
out-of-round using an outside micrometer (1).

Figure 6A1 – 338

Engine Mechanical – V6

Page 6A1–206

Page 6A1–206

4

Measure the camshaft runout using a dial
indicator (1).

Figure 6A1 – 339

5

Measure the camshaft thrust width for wear using a
depth micrometer (A).

Figure 6A1 – 340

6

Measure the camshaft thrust wall surface for runout
using a dial indicator (1).

Figure 6A1 – 341