Isuzu KB P190. Manual — part 657
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.
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 – 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
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
Engine Mechanical – V6
Page 6A1–151
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 – 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
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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