2007 ISUZU KB P190 torque

Engine Mechanical – V6 Page 6A1–63
Page 6A1–63
Step Action Yes No
8
Tighten any loose fasteners to the corre ct torque specification, refer to
6 Torque Wrench Specifications.
Replace any incorrect or missing fasteners.
Does the drive belt continue to fall off? Go to Step 9 Go to Step 12
9
Test the accessory drive belt tensi oner for correct operation, refer to
Accessory Drive Belt Tensioner Diagnosis in this Section.
Did you accessory drive belt tensioner operat e correctly? Go to Step 11 Go to Step 10
10 Replace the drive belt tensioner, refer to
3.7 Accessory Drive Belt Tensioner Assembly.
Does the drive belt continue to fall off? Go to Step 11 Go to Step 12
11 Inspect for a failed drive belt idler and drive belt tensioner bearings.
Did you find and repair any failed bearings? Go to Step 12 Refer to Diagnostic
Aids in this Section
12 If required, reinstall the accessory drive belt and operate the system to
confirm the repair.
Does the drive belt continue to fall off? Go to Step 2 Accessory drive
system OK

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Engine Mechanical – V6 Page 6A1–65
Page 6A1–65
Accessory Drive Belt Tensioner Diagnosis
Diagnostic Table
Step Action Yes No
1 1 Remove the accessory drive belt.
2 Inspect the drive belt tensioner pulley.
Is the drive belt tensioner pulley loose or misaligned? Go to Step 4 Go to Step 2
2 Rotate the drive belt tensioner.
Does the drive belt tensioner ro tate freely, without any unusual
resistance or binding? Go to Step 3 Go to Step 4
3 1 Using a suitable torque wrench, measure the torque required to
lift the drive belt tensioner off the stop.
2 Using a known good tensioner, m easure the torque required to
lift the drive belt tensioner off the stop.
Is the first torque reading within 10% of the second reading? Accessory drive belt
tensioner OK Go to Step 4
4 Replace the drive belt tensioner, refer to
3.7 Accessory Drive Belt Tensioner Assembly.
Is the repair complete? Accessory drive belt
tensioner OK —

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–66
Page 6A1–66
3 Minor Service Operations
ATTENTION
The V6 engine is a combination of numerous components, containing machined, honed, polished and lapped
surfaces manufactured on the latest, high technology production equipment. Many of the components
contain tolerances measured in thousa ndths of a millimetre. Consequently, when any e ngine component is to
be serviced, care and cleanliness are extremely important.
Prior to re-assembly of the engine, all components mu st be cleaned and inspected in accordance with the
relevant clean and inspect procedur es throughout this Section, and repl aced or repaired where required.
In addition to cleaning and inspecting components, a liberal coating of engine oil should be applied to friction
surfaces during assembly to protect and lubr icate the surfaces on initial operation.
When performing any service operation, it should be understood that correct cleaning and protection of
machined surfaces and friction areas is part of the repair procedure. This is considered standard workshop
practice, even if not specifically stated. Torque va lues must be used as specified during reassembly to
ensure correct retention of all components.
Through out this section, fastener torque wrench sp ecifications may be accompanied with the following
identification marks:
■ Fasteners must be replaced after loosening.
Fasteners either have micro encapsulated sealant a pplied or incorporate a mechanical thread lock and
should only be re-used once. If in doubt, replacement is recommended.
If one of these identification marks is present alongs ide a fastener torque wrench specification, the
recommendation regarding that fastener must be adhered to.
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 a llow the oil to drain back into the oil pan.
4 Remove the oil level indicator (1) and wipe clean.
5 Insert the indicator, ens uring 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

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–67
Page 6A1–67
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 Section 0A General Information.
3 Clean any foreign material from around the oil drain pl ug 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 sca lding from the hot oil. Allow the oil to drain.
5 Clean and inspect the drain plug threads . If damaged, replace the drain plug.

Figure 6A1 – 24
6 Once the oil has completely drained, reinstall the dr ain plug and tighten to the correct torque specification.
Oil pan drain plug
torque specificat ion ............................................ 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 5W30 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.

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–70
Page 6A1–70
3.3 Oil Filter Adaptor
Remove

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.
2 Disconnect the wiring harness connecto r from the oil pressure sender.

3 Remove the oil filter adaptor attaching bolts (2), four
places.
4 Remove the oil filter adaptor and discard the gasket (3).
5 Clean the surfaces of t he adaptor and cylinder block.

• Do not use a screwdriver or similar to
prise the oil filter adapter from the engine
as damage to the sealing surface may
occur.
• If required, use a rubber mallet to tap the
oil filter adapter to loosen the
components prior to separating.
Tapping should be done at bends,
corners or reinforced areas to prevent
distortion of parts.
Figure 6A1 – 27
Reinstall
Reinstallation of the oil filter adaptor is the reverse of the remo val procedure, noting the following:
1 A new gasket must be used.
2 Loosely install the oil filter adaptor attaching bolts, then tighten all fast eners to the correct torque specification.
Oil filter adaptor attaching bolt
torque specificatio n ...................................20.0- 26.0 Nm

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–71
Page 6A1–71
3.4 Oil Level Indicator Tube
Remove
1 Remove the oil level indicator from the oil level indicator tube.
2 Remove the bolt (2) attaching the oil level indicator tube (1) and engine wiring harness retaining bracket.
3 Withdraw the oil level indi cator tube from the oil pan.
4 Remove and discard the o-ring at the bottom of the oil level indicator tube.
Figure 6A1 – 28
Reinstall
Reinstallation of the oil level indicator tube is the reverse of the removal procedure, noting the following:
1 Install a new oil level indicator o-ring.
2 Ensure the attaching bolt passes through the engine wiring harness retaining bracket.
3 Tighten bolt to the correct torque specification.
Oil level indicator tube attaching bolt
torque specificatio n ................................... 8. 0 – 12.0 Nm


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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–74
Page 6A1–74
3.6 Accessory Drive Belt Idler Pulley
Remove
1 Remove the accessory drive belt, refer to 3.5 Accessory Drive Belt.
2 Remove the accessory drive belt idler pulley attaching bolt (1).
3 Remove the dished washer (2) and accessory drive belt idler pulley (3).

Figure 6A1 – 31
Reinstall
Reinstallation of the accessory drive belt idler pulley is t he reverse of the removal procedure. Tighten the bolt to the
correct torque specification.
Accessory drive belt idler pulley
attaching bolt torque specification ......................50.0 Nm


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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–75
Page 6A1–75
3.7 Accessory Drive Belt Tensioner
Assembly
Remove
1 Remove the accessory drive belt, refer to 3.5 Accessory Drive Belt.
2 Remove the three bolts (2) attaching accessory drive belt tensioner assembly (1).
3 Remove the accessory drive belt tensioner assembly.
NOTE
The accessory drive belt tensioner pulley is not
serviced separately. If the pulley is found to be
faulty, the entire tensi oner assembly must be
replaced.

Repairing a damaged accessory drive belt
pulley should not be attempted under any
circumstances.


Figure 6A1 – 32
Reinstall
Reinstallation of the accessory drive belt tensioner assembly is the reverse of the removal procedure. Tighten the bolts to
the correct torque specification.
Accessory drive belt tensioner
attaching bolt torque specification ......................50.0 Nm



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ISUZU KB P190 2007