2007 ISUZU KB P190 check engine

Engine Mechanical – V6 Page 6A1–46

7 Misalignment of the pulleys may be caused by one of the following:
• Incorrect mounting of an accessory drive component,
• Incorrect installation of an accessory drive pulley or,
• Bent or damaged pulley.
Test for a misaligned pulley using a straight edge in the pulley grooves across 2 or 3 pulleys. If a misaligned pulley is found, refer to the relevant component service information for the correct installation and removal procedures.
8 This test is to confirm the pulleys are the correct diameter and/or width. Using a known good vehicle, compare the pulley sizes.
Diagnostic Table
Step Action Yes No
1 Did you review the information provided in 2.2 Symptoms, and
perform the required inspections. Go to Step 2 Go to 2.2
Symptoms
2 Confirm the customer complaint. Is there a squealing noise? Go to Step 3 Refer to Diagnostic
Aids in this Section
3 1 Remove the drive belt, refer to 3.5 Accessory Drive Belt.
2 Operate the engine for no more than 40 seconds.
Does the squealing noise still exist? Accessory drive
system OK.
Go to 2.2
Symptoms, and restart the
diagnosis of the noise Go to Step 4
4 Inspect the accessory drive components for a seized bearing and
general malfunctions.
Did you find and correct any seized bearings or general malfunctions
in the accessory drive system? Go to Step 9 Go to Step 5
5 Test the accessory drive belt tensioner for correct operation, refer to
Accessory Drive Belt Tensioner Diagnosis.
Did you find and repair any problems with the tensioner? Go to Step 9 Go to Step 6
6 Inspect the accessory drive belt is the correct length, refer to 3.5
Accessory Drive Belt.
Did you find and repair any problems with the drive belt length? Go to Step 9 Go to Step 7
7 Inspect the accessory drive pulleys for misalignment.
Did you find and correct any misaligned accessory drive pulleys? Go to Step 9 Go to Step 8
8 Check the accessory drive pulleys are the correct size. Did you find and replace any incorrect pulleys? Go to Step 9 Refer to Diagnostic
Aids in this Section
9 Reinstall the accessory drive belt and operate the system to confirm
the repair.
Did you correct the squeal noise? Accessory drive
system OK Go to 2.2
Symptoms, and restart the diagnosis
Drive Belt Whine
Definition
Accessory drive belt whine can be defined as a high-pitched continuous noise that is most likely to be caused by a failed
bearing in one of the accessory drive components.
Diagnostic Aids
The drive belts themselves will not cause a whine. If the noise is intermittent, confirm the accessory drive components by
varying their loads, making sure they are operated to their maximum capacity. An overcharged A/C system, restrictions
in the power steering pressure circuit or a faulty generator or coolant pump are likely causes of accessory drive belt
whine.
Test Description
The numbers below refer to steps in the diagnostic table.

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–54

3.1 Engine Oil
The procedure outlined below is typically the same for both rear wheel drive and all wheel drive vehicles.
Check
The following procedure is applicable to both rear wheel and all wheel drive vehicles
1 Run the engine to bring it to normal operating temperature.
2 Park the vehicle on a level surface. A vehicle that is not level will affect the accuracy of the level reading.
3 Stop the engine and wait 5 to 10 minutes to allow the oil to drain back into the oil pan.
4 Remove the oil level indicator (1) and wipe clean.
5 Insert the indicator, ensuring it is fully seated.
6 Slowly remove the indicator to avoid smearing. Hold it horizontally or with lower end slightly down to avoid
oil running along indicator.
7 Observe the oil level where it passes over the centre line of the indicator.
8 If the level is lower than the Add mark (2), add enough oil to the engine to reach the Upper mark (3).
Do not add too much oil as the reading should never
be above the Upper mark.
NOTE
When topping up the oil, allow approximately 5
to 10 minutes for the added oil to fully drain into
the oil pan.
Figure 6A1 – 23
Replace
NOTE
• Quicker and more complete draining will
occur if the engine oil is at normal operating
temperature. However, care must be taken to
avoid scalding from the hot oil.
• It recommended the oil filter be changed at
each engine oil change, refer to 3.2 Oil
Filter.
1 Remove the oil fill cap.
2 To ensure complete draining of the oil pan, raise the front and rear of the vehicle to maintain a level attitude. If not using a hoist, support the vehicle with safety stands, refer to 0A General Information.
3 Clean any foreign material from around the oil drain plug and place a suitable, clean drain tray under the engine.

The oil may be hot. Avoid contact with the oil.
Ensure that eyes and skin are protected.
4 Remove the drain plug (1), taking care to avoid scalding from the hot oil. Allow the oil to drain.
5 Clean and inspect the drain plug threads. If damaged, replace the drain plug.

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–55


Figure 6A1 – 24
6 Once the oil has completely drained, reinstall the drain plug and tighten to the correct torque specification.
Oil pan drain plug
torque specification ............................................25.0 Nm
7 Replace the oil filter, refer to 3.2 Oil Filter.
8 Lower the vehicle to the ground and fill with the specified amount of SAE 5W 30 lubricant.
Engine Oil Capacity:
With Oil Filter Change ........................................6.5 litres
9 Install the oil fill cap.
10 Start the engine and check for leaks.
Pressure Check
1 Run the engine to bring it to normal operating temperature.
2 Park the vehicle on a level surface. A vehicle not level will affect the accuracy of the level reading.
3 Stop the engine and wait 5 to 10 minutes to allow the oil to drain back into the oil pan.
4 Check the oil level and top up with the recommended engine oil as required, refer to Check, in this Section.
5 Remove the engine oil pressure sensor (1), refer to 6C1-3 Engine Management – V6 – Service
Operations.
6 Install the oil pressure gauge adaptor, Tool No. J36648-A into the oil pressure sender hole in the oil
filter housing.
7 Install a suitable oil pressure gauge into the adaptor.
8 Start the engine.
9 Measure and record the pressure reading on the gauge at idle and 2000 r.p.m. Compare the results
with the specification.
Minimum engine oil pressure
@ idle................................................................... 69 kPa
@ 2000 r.p.m. .................................................... 138 kPa
10 If the engine oil pressure is not to specification, refer to 2.19 Engine Oil Pressure Diagnosis.
11 After completing the engine oil pressure check, stop the engine and remove the oil pressure gauge.
Figure 6A1 – 25
12 Reinstall the oil pressure sensor, refer to 6C1-3 Engine Management – V6 – Service Operations.
13 Start the engine and check for leaks.

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–68

CAUTION
Tighten the intake manifold bolts in a circular
pattern starting at the centre bolt and moving
outward.
2 Ensure that all fasteners are tightened to the correct torque specification. Upper intake manifold to lower
intake manifold attaching bolt
torque specification ............................................23.0 Nm
Upper intake manifold to
cylinder head attaching bolt
torque specification ............................................23.0 Nm

Incorrect wiring connector installation may
cause component malfunction or component
damage.
3 Ensure all wiring connectors are fully engaged and if applicable, locked in place.
4 Ensure all wiring harnesses are correctly routed and attached securely in their retaining clips.
5 Ensure that all hoses and pipes are routed correctly and that any retaining clips are correctly installed.
6 Start and run the engine to check for correct operation.
3.10 Intake Manifold Assembly – Complete
The intake manifold comprises of an upper and lower section. Some service procedures only require the removal of the
upper intake manifold (e.g. fuel injector/spark plug servicing), while other service procedures require the removal of both
the upper and lower manifold as a complete assembly (e.g. cylinder head/s). If only the upper intake manifold needs to
be removed, refer to 3.9 Upper Intake Manifold.
Remove

Disconnection of the battery affects certain
vehicle electronic systems. Refer to 1.1
WARNING, CAUTION and NOTES before
disconnecting the battery.
1 Depressurise the fuel system.
2 Disconnect the battery negative terminal.

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–75

CAUTION
Tighten the intake manifold bolts in a circular
pattern starting at the centre bolt and moving
outward.
4 Ensure that all fasteners are tightened to the correct torque specification. Upper intake manifold to lower intake
manifold attaching bolt torque specification .......23.0 Nm
Upper intake manifold to cylinder
head attaching bolt torque specification .............23.0 Nm
Lower intake manifold to cylinder
head attaching bolt torque specification .............23.0 Nm
Fuel injector wiring harness bracket
attaching bolt torque specification ........................9.0 Nm

Incorrect wiring connector installation may
cause component malfunction or component
damage.
5 Ensure all wiring connectors are fully engaged and if applicable, locked in place.
6 Ensure all wiring harnesses are correctly routed and attached securely in their retaining clips.
7 Ensure that all hoses and pipes are routed correctly and that any retaining clips are correctly installed.
8 After installation pull on any quick connect fittings to check that each is correctly installed.
9 Start and run the engine to check for correct operation.
3.11 Exhaust Manifold Assembly
Remove

Allow the engine to cool before commencing.

Disconnection of the battery affects certain
vehicle electronic systems, refer to 1.1
WARNING, CAUTION and NOTES before
disconnecting the battery.
1 Disconnect the battery negative terminal.

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–77

12 Remove the three bolts (1), attaching the exhaust
manifold inner heat shield to the exhaust manifold.

13 Using a suitable commercially available non-corrosive cleaning solvent and a soft bristled parts cleaning
brush, thoroughly clean the exhaust manifold.
14 Dry the exhaust manifold using compressed air.

Safety glasses must be worn when using
compressed air.
Figure 6A1 – 59
NOTE
• The same procedure applies to the Right-
hand exhaust manifold.

• To gain access to the lower rear exhaust
manifold attaching bolts (2), apply a slight
downward movement to the coolant inlet
pipe (1).

Inspect
Inspect the exhaust manifold (1) for the following:
• Damage to the threaded holes for the heat shield
mounting.
• Damage to the exhaust manifold mounting holes.
• Damage to the threads of the exhaust manifold to
exhaust pipe flange studs.
• Damage to the gasket sealing surfaces.
• Using a straight edge (2) and feeler gauges (3), check
the cylinder head mounting face of the exhaust
manifold does not exceed the maximum distortion
specification of 0.25mm.
NOTE
If the surface flatness is not within
specifications, the exhaust manifold is warped
and must be replaced.
Figure 6A1 – 60
Reinstall
Reinstallation of the exhaust manifold assembly is the reverse of the removal procedure, noting the following:
1 Ensure the exhaust manifold, cylinder head and exhaust pipe flange surfaces are clean.

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–81

14 Remove the bolt (1), 13 places, attaching the camshaft
cover (2) to the cylinder head (3).
15 Remove the cover and discard the seal.
Figure 6A1 – 66
16 Install Tool No. EN-46101 (1) to the spark plug tubes of the cylinder head to prevent entry of dirt into the
combustion chamber.
Figure 6A1 – 67
Clean and Inspect

Safety glasses must be worn when using
compressed air.
1 Clean the camshaft cover with suitable cleaning solvent and blow dry with compressed air.
2 Inspect the cover for cracking and distortion.
3 Check the spark plug tube seals for damage.
4 If the camshaft cover is damaged in any way that will affect it’s performance to seal and stop the ingress of dirt, replace the camshaft cover.
Reinstall
Reinstallation of the camshaft cover assembly is the reverse of the removal procedure, noting the following:

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–97

5 After aligning the crankshaft sprocket timing mark,
check that the camshaft flats (1) at the rear of the
right-hand cylinder head are parallel with the
camshaft cover rail (2).
6 If the camshaft flats are not as shown, rotate the crankshaft 360 °.
Figure 6A1 – 103
7 Install Tool No. EN 46105-1 (1) onto the rear of the right-hand cylinder head camshafts (2).
Figure 6A1 – 104
8 Install Tool No. EN 46105-2 (1) onto the rear of the left-hand cylinder head camshafts (2), and tool No
Figure 6A1 – 105

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ISUZU KB P190 2007