engine ISUZU KB P190 2007 Workshop Repair Manual

Engine Mechanical – V6 Page 6A1–188
Page 6A1–188
CAUTION
Ensure the tips of Tool No.
EN-46108 are fully engaged into the timing
chain and the wing nuts are tight and the
timing chain is taught.
9 Install Tool No. EN-46108 (1 and 2) to retain the timing chain (3 and 4).
10 Firmly tighten the wing nuts of Tool No. EN-46108.
11 Mark the timing chain and the respective location on both camshaft sprocket.
NOTE
Ensure the camshaft timing chain and the
camshaft sprocket are marked for correct
reassembly.

Figure 6A1 – 301
12 Remove the bolt (1) attaching the right-hand exhaust camshaft sprocket (2) and remove the sprocket.


Figure 6A1 – 302
13 Remove the bolt (1) attaching right-hand intake camshaft sprocket (2) and remove the sprocket.

Figure 6A1 – 303

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–189
Page 6A1–189
Left-hand Side
1 Remove the left-hand camshaft cover, refer to 3.12 Camshaft Cover .
2 Remove the camshaft position sensors, refer to Section 6C1-3 Engine Management – V6 – Service Operations.
3 Remove the camshaft position actuator solenoids, refer to Section 6C1-3 Engine Management – V6 – Service
Operations .
4 Remove the crankshaft bal ancer assembly, refer to 3.13 Crankshaft Balancer Assembly .
5 Install the crankshaft rotation socket Tool No. EN-46111 onto the crankshaft.
6 Rotate the crankshaft until the camshafts are in a neutral low tension position. The camshaft flats will be
parallel with the camshaft cover rail (1).


Figure 6A1 – 304
7 Install Tool No. EN-46105 – 1 (1) onto the rear of the
left-hand cylinder head camshafts (2).


Figure 6A1 – 305

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–190
Page 6A1–190
NOTE
Use an open-end wrench (1) at the camshaft
hex (2) to prevent camshaft/engine rotation.
NOTE
Do not remove the cams haft sprocket bolt (3) at
this time.
8 Loosen the camshaft sprocket bolt (3). NOTE
If the camshaft timing chain has already been
removed proceed to Step 12.


Figure 6A1 – 306
CAUTION
Ensure the tips of Tool No. EN-46108 are
fully engaged into the timing chain and the
wing nuts are tight and the timing chain is
taught.
9 Install Tool No. EN-46108 (1 and 2) to retain the timing chain (3 and 4).
10 Firmly tighten the wing nuts of Tool No. EN-46108.
NOTE
Ensure the camshaft timing chain and the
camshaft sprocket are marked for correct
reassembly.
11 Mark the timing chain and the respective location on both camshaft sprocket.

Figure 6A1 – 307
12 Remove the bolt (1) attaching the left-hand exhaust camshaft sprocket (2) and remove the sprocket.

Figure 6A1 – 308

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–191
Page 6A1–191
13 Remove the bolt (1) attaching left-hand intake
camshaft sprocket (2) and remove the sprocket.

Figure 6A1 – 309
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 – 310

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–192
Page 6A1–192
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 – 311
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 6A1–193
Page 6A1–193
3.19 Camshaft Sprocket – MY06 Update
CAUTION
Setting the camshaft timing is required
whenever the camshaft drive system is
disturbed to ensure the relationship between
any chain and sprocket is not lost. Even when
only one sprocket is involved, multiple
crankshaft rotations will not produce
conditions where correct timing can be
confirmed.
If required, follow the Left-hand Secondary
Camshaft Chain Components reinstallation
procedure to reset the camshaft timing.
Remove
Right-hand Side
1 Remove the right-hand camshaft cover, refer to 3.12 Camshaft Cover.
2 Remove the camshaft position sensors, refer to Section 6C1-3 Engine Management – Service Operations.
3 Remove the camshaft position actuator solenoids, refer to Section 6C1-3 Engine Management – V6 – Service
Operations .
4 Remove the crankshaft bal ancer assembly, refer to 3.13 Crankshaft Balancer Assembly .
5 Install the crankshaft rotation socket Tool No. EN-46111 onto the crankshaft.
6 Rotate the crankshaft until the camshafts are in a neutral low tension position. The camshaft flats will be
parallel with the camshaft cover rail (1).

Figure 6A1 – 312

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–194
Page 6A1–194
7 Install Tool No. EN-46105–1 (1) onto the rear of the
right-hand cylinder head (3) camshafts (2).

Figure 6A1 – 313
NOTE
Use an open-end spanner (1) at the camshaft
hex (2) to prevent camshaft/engine rotation.
NOTE
Do not remove the cams haft sprocket bolt (3) at
this time.
8 Loosen the camshaft sprocket bolt (3). NOTE
If you have already removed the camshaft
timing chain proceed to Step 12

Figure 6A1 – 314
NOTE
The front engine cover is removed in the
following graphic for illustration purposes and is
not required to be removed to perform this
procedure.
9 Loosen the timing chain retention Tool No. EN 48313 so that the legs are retracted.
10 Insert the Tool No. EN 48313 between the camshaft actuators, rearward of t he timing chain until the top
line that is scribed into t he body of the tool (1) is
adjacent to the top surfac e of the cylinder head (2).
This is the approximat e installed position.

Figure 6A1 – 315

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–195
Page 6A1–195
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.
13 Continue expanding the Tool No. EN 48313 until the feet (2) contact the timing chain.

Figure 6A1 – 316
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 right intake and exhaust camshafts and rotate the
camshafts towards each other in order to creat e slack 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 right-hand exhaust camshaft sprocket (2) and remove the sprocket.


Figure 6A1 – 317

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–196
Page 6A1–196
19 Remove the bolt (1) attaching right-hand intake
camshaft sprocket (2) and remove the sprocket.

Figure 6A1 – 318
Left-hand Side
1 Remove the left-hand cams haft cover, refer to 3.12 Camshaft Cover .
2 Remove the camshaft position sensors, refer to Section 6C1-3 Engine Management – V6 – Service Operations.
3 Remove the camshaft position actuator solenoids, refer to Section 6C1-3 Engine Management – V6 – Service
Operations .
4 Remove the crankshaft bal ancer assembly, refer to 3.13 Crankshaft Balancer Assembly .
5 Install the crankshaft rotation socket Tool No. EN-46111 onto the crankshaft.
6 Rotate the crankshaft until the camshafts are in a neutral low tension position. The camshaft flats will be
parallel with the camshaft cover rail (1).


Figure 6A1 – 319

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–197
Page 6A1–197
7 Install Tool No. EN-46105–1 (1) onto the rear of the
left-hand cylinder head camshafts (2).


Figure 6A1 – 320
NOTE
Use an open-end wrench (1) at the camshaft
hex (2) to prevent camshaft/engine rotation.
NOTE
Do not remove the cams haft sprocket bolt (3) at
this time.
8 Loosen the camshaft sprocket bolt (3).
NOTE
If the camshaft timing chain has already been
removed proceed to Step 12.



Figure 6A1 – 321
NOTE
The front engine cover is removed in the
following graphic for illustration purposes and is
not required to be removed to perform this
procedure.
9 Loosen the timing chain retention Tool No. EN 48313 so that the legs are retracted.
10 Insert the Tool No. EN 48313 between the camshaft actuators, rearward of t he timing chain until the top
line that is scribed into t he body of the tool (1) is
adjacent to the top surfac e of the cylinder head (2).
This is the approximat e installed position.

Figure 6A1 – 322

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ISUZU KB P190 2007