engine ISUZU KB P190 2007 Workshop Repair Manual

Engine Mechanical – V6 Page 6A1–198
Page 6A1–198
11 Ensure that the feet (2) of the Tool No. EN 48313 are
facing the front of the engine.
CAUTION
DO NOT tighten the Tool No. EN 48313 at
this stage.
12 Partially expand the legs (1) on the Tool No. EN 48313 by turning the T-shaped handle clockwise.
CAUTION
Ensure the feet (2) of the Tool No. EN 48313
are correctly engaged into one of the link
pockets to prevent the chain from slipping
during tightening.

Figure 6A1 – 323
13 Continue expanding the Tool No. EN 48313 until the feet (2) contact the timing chain.
14 Hand tighten the Tool No. EN 48313. DO NOT allow the body of the Tool No. EN 48313 to rotate when tightening
the T-handle.
15 Use an open-end spanner on the hex cast into both the left intake and exhaust camshafts and rotate the camshafts
towards each other in order create sla ck in the chain between the actuators.
16 The Tool No. EN 48313 is now correctly inst alled to hold the timing chain in position.
NOTE
Ensure the camshaft timing chain and the
camshaft position actuators are marked for
correct reassembly.
17 Mark the timing chain and the respective location on both camshaft position actuators.
18 Remove the bolt (1) attaching the left-hand exhaust camshaft sprocket (2) and remove the sprocket.

Figure 6A1 – 324

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–199
Page 6A1–199
13 Remove the bolt (1) attaching left-hand intake
camshaft sprocket (2) and remove the sprocket.

Figure 6A1 – 325
Clean
1 Clean the exterior of each ca mshaft sprocket with solvent.

Safety glasses must be worn when using
compressed air.
2 Dry the timing components with compressed air.
Inspect
1 Inspect the front of each sprocket for the following:
• Sprocket damage (1), and
• Sprocket bolt seating inner hub damage (2).


Figure 6A1 – 326

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–200
Page 6A1–200
2 Inspect the back of each sprocket for the following:
• Sprocket damage (1),
• Camshaft locating pin damage (2) and,
• Camshaft seating/sealing inner hub flange
damage (3),


NOTE
These checks apply to both the inlet and
exhaust camshaft sprockets.

Figure 6A1 – 327
Reinstall
Reinstallation of the camshaft sprocke ts is the reverse of the removal procedure, noting the following:
1 Align the sprockets and timing chain with the marks made during removal.
2 Tighten the camshaft sprocket bolts to the correct torque specification.
Camshaft sprocket attaching
bolt torque specificat ion .......................... 49.0 – 67.0 Nm
3 Remove the timing chain retention tools.

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–201
Page 6A1–201
3.20 Camshaft
Remove
Right-hand Side
1 Remove the right-hand cylinder head camshaft sprockets, refer to 3.18 Camshaft Sprocket.
NOTE
Tool No. EN-46105–1 was installed as part of the
right-hand cylinder head camshaft sprocket
removal procedure.
2 Remove the Tool No. EN-46105–1 (1) from the right- hand cylinder head camshafts (2).



NOTE
Tool No. EN-46105 was installed as part of the
right-hand cylinder head camshaft sprocket
removal procedure.

Figure 6A1 – 328
3 Observe the markings (1) on the bearing caps. Each bearing cap is marked 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 t he intake camshaft.
• An E indicates the exhaust camshaft.
• The number indicates the journal position from
the front of the engine.


Figure 6A1 – 329

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–202
Page 6A1–202
4 Remove the camshaft bearing cap bolts (1) and
caps (2).

Figure 6A1 – 330
5 Remove the camshafts (1).


Figure 6A1 – 331

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ISUZU KB P190 2007

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 .
NOTE
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.


NOTE
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 t he intake camshaft.
• An E indicates the exhaust camshaft.
• The number indicates the journal position from
the front of the engine.


Figure 6A1 – 333

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ISUZU KB P190 2007

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.

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ISUZU KB P190 2007

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 spro cket 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 .

NOTE
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 outsi de micrometer (1).


Figure 6A1 – 338

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ISUZU KB P190 2007

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

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–207
Page 6A1–207
7 Measure the camshaft lobes for wear using a dial
indicator (1).


Figure 6A1 – 342
8 Place the dial indicator tip on the base circle (1) of the camshaft lobe.
9 Set the dial indicator at zero.
10 Rotate the camshaft until the indicator tip is at the highest point (2) on the lobe. This reading is the lift of
the camshaft lobe.


Figure 6A1 – 343
Reinstall
Right-hand Side
1 Select the correct camshaft for the particular installation location. ID markings are on the rear end
of each camshaft. The ID markings are defined as
follows:
• The first five digits refer to the date and time of
production.
• Example = 3L18H.
• Digits six through nine refer to engine
production code.
• LY7 = Alloytec 190 engine.
• The last two digits refer to position:
• LI = left-hand intake.
• LE = left-hand exhaust.
• RI = right-hand intake.
• RE = right-hand exhaust.


Figure 6A1 – 344

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ISUZU KB P190 2007