Page 2625 of 6020
Engine Mechanical – V6 Page 6A1–146
13 Remove the bolt (1) attaching left-hand intake
camshaft sprocket (2) and remove the sprocket.
Figure 6A1 – 235
Clean
1 Clean the exterior of each camshaft 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 – 236
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ISUZU KB P190 2007
Page 2626 of 6020

Engine Mechanical – V6 Page 6A1–147
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 – 237
Reinstall
Reinstallation of the camshaft sprockets 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 specification ..........................49.0 – 67.0 Nm
3 Remove the timing chain retention tools.
3.19 Camshaft
Remove
Right-hand Side
1 Remove the right-hand cylinder head camshaft sprockets, refer to 3.18 Camshaft Sprocket.
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 – 238
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ISUZU KB P190 2007
Page 2627 of 6020
Engine Mechanical – V6 Page 6A1–148
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 the intake camshaft.
• An E indicates the exhaust camshaft.
• The number indicates the journal position from
the front of the engine.
Figure 6A1 – 239
4 Remove the camshaft bearing cap bolts (1) and caps (2).
Figure 6A1 – 240
5 Remove the camshafts (1).
Figure 6A1 – 241
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ISUZU KB P190 2007
Page 2628 of 6020
Engine Mechanical – V6 Page 6A1–149
Left-hand Side
1 Remove the left-hand cylinder head camshaft position actuators, refer to 3.18 Camshaft Sprocket.
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 – 242
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 – 243
4 Remove the camshaft bearing cap bolts (1) and caps (2).
Figure 6A1 – 244
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ISUZU KB P190 2007
Page 2629 of 6020
Engine Mechanical – V6 Page 6A1–150
5 Remove the camshafts (1).
Figure 6A1 – 245
Clean
1 Clean the camshaft in solvent.
Safety glasses must be worn when using
compressed air.
2 Dry the camshaft with compressed air.
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 – 246
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ISUZU KB P190 2007
Page 2630 of 6020
Engine Mechanical – V6 Page 6A1–151
Camshaft Measurement
1 W ith 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 – 247
3 Measure the camshaft (2) journals for diameter and out-of-round using an outside micrometer (1).
Figure 6A1 – 248
4 Measure the camshaft runout using a dial indicator (1).
Figure 6A1 – 249
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Page 2631 of 6020
Engine Mechanical – V6 Page 6A1–152
5 Measure the camshaft thrust width for wear using a
depth micrometer (A).
Figure 6A1 – 250
6 Measure the camshaft thrust wall surface for runout using a dial indicator (1).
Figure 6A1 – 251
7 Measure the camshaft lobes for wear using a dial indicator (1).
Figure 6A1 – 252
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ISUZU KB P190 2007
Page 2632 of 6020

Engine Mechanical – V6 Page 6A1–153
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 – 253
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 – 254
2 Apply a liberal amount of engine oil to the camshaft (1) journals and the right-hand cylinder
head camshaft carriers (2).
Figure 6A1 – 255
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ISUZU KB P190 2007