engine ISUZU KB P190 2007 Workshop Repair Manual

Engine Mechanical – V6 Page 6A1–176

7 Position the valve spring (2) on the spring seat (1).
8 Place the valve spring retainer onto the valve spring.
CAUTION
Do not compress the valve springs less than
24.0 mm. Contact between the valve spring
retainer and the valve stem oil seal can
cause potential valve stem oil seal damage.

Compressed valve springs (1) have high
tension against the valve spring
compressor (2). Valve springs that are not
correctly compressed by, or are released
from, the valve spring compressor can be
ejected from the valve spring compressor
with intense force. Use care when
compressing or releasing the valve spring
with the valve spring compressor and when
removing or installing the valve stem keys.
Failing to use care may cause personal
injury.
Figure 6A1 – 302
9 Compress the valve spring using valve spring compressor Tool No. J-8062 and adaptor Tool No.
EN-46119.



CAUTION
Ensure correct directional placement of
valve collets (1) in Tool No. EN-46117 (2).
The valve collets must be installed with the
tapered end towards the valve stem seal.
Figure 6A1 – 303
10 W ith the spring compressed, install the valve collets into Tool No. EN 46117.



Figure 6A1 – 304

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Engine Mechanical – V6 Page 6A1–177

11 Place the collets into position by pushing the tool (1)
downward and releasing tension on the valve spring
compressor (2).
12 Verify the valve collets are installed by placing a rag over the valve tip and tapping with a dead-blow
hammer. The valve collets and the spring should
remain in place.

Figure 6A1 – 305
Reinstall
Right-hand Side (Bank 1) Cylinder Head
The reinstallation procedure for the right-hand side cylinder head assembly is the reverse of the removal procedure,
noting the following:
1 Ensure all fasteners are tightened to the correct torque specification.
2 Using crankshaft rotation Tool No. EN-46111 (1), align the crankshaft sprocket timing mark (2) with the
indexing mark (3) on the oil pump housing.

Figure 6A1 – 306

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Engine Mechanical – V6 Page 6A1–178

3 Ensure the deck face is clean and the cylinder head
locating pins are securely mounted in the cylinder
block deck face.
4 Install a new right-hand cylinder head gasket (1) using the deck face locating pins for retention.
Figure 6A1 – 307
5 Align the cylinder head with the locating pins.
6 Place the cylinder head in position on the deck face.
NOTE
Do not allow oil on the cylinder head bolt
bosses.
CAUTION
Do not reuse the old M11 cylinder head bolts
(1 to 8 inclusive).
7 Install new M11 cylinder head bolts (1) eight places and tighten in the sequence shown and to the correct
torque specification.



Figure 6A1 – 308
„ Cylinder head M11 attaching bolt
torque specification:
Stage 1: .............40.0 – 50.0 Nm
Stage 2: .............................. 120°

Figure 6A1 – 309
Left-hand Side (Bank 2) Cylinder Head
The reinstallation procedure for the left-hand side cylinder head assembly is the reverse of the removal procedure, noting
the following:

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Engine Mechanical – V6 Page 6A1–179

1 Ensure all fasteners are tightened to the correct torque specification.
2 Using crankshaft rotation Tool No. EN-46111 (1), align the crankshaft sprocket timing mark (2) with the
indexing mark (3) on the oil pump housing.
Figure 6A1 – 310
3 Ensure the deck face is clean and the cylinder head locating pins are securely mounted in the cylinder
block deck face.
4 Install a new cylinder head gasket (1) using the deck face locating pins for retention.
Figure 6A1 – 311
5 Align the cylinder head with the locating pins.
6 Place the cylinder head in position on the deck face.
NOTE
Do not allow oil on the cylinder head bolt
bosses.
CAUTION
Do not reuse the old M11 cylinder head bolts
(1 to 8 inclusive).
7 Install new M11 cylinder head bolt (1), eight places, and tighten in the sequence shown and to the correct
torque specification.

Figure 6A1 – 312

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Engine Mechanical – V6 Page 6A1–180

8 Install the front M8 cylinder head bolt (2), two places,
and tighten in the sequence (9 and 10) and to the
correct torque.


„ Cylinder head M11 attaching bolt
torque specification:
Stage 1: .............40.0 – 50.0 Nm
Stage 2: .............................. 120°

„ M8 cylinder head bolt
torque specification
Stage 1: .............12.0 – 18.0 Nm
Stage 2: ................................ 60°

Figure 6A1 – 313

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Engine Mechanical – V6 Page 6A1–181

3.23 Engine Mounts and Brackets
Remove
1 Remove the exhaust manifold assembly from the side of the engine where the engine mount is to be removed,
refer to 3.11 Exhaust Manifold Assembly.
2 Fit the engine lift brackets, Tool No. EN-46114 (1) to the cylinder heads.
CAUTION
Only lift the engine far enough to take the
weight off the engine mount, or damage to
the mount and lifting equipment failure may
occur.
3 Using an engine lifting crane, raise the side of the engine where the mount is to be removed enough to
remove the weight from the engine mounts, and
create a slight tension in the lifting equipment.

Figure 6A1 – 314
4 Remove the left-hand or right-hand side engine mount and bracket as required.
Figure 6A1 – 315

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Engine Mechanical – V6 Page 6A1–182

Engine Mount Location

Figure 6A1 – 316
Inspect
NOTE
Although the following procedure provides
information regarding on-vehicle engine mount
inspections, it is preferable to inspect the engine
mounts once removed from the vehicle.
1 Fit the engine lift brackets, Tool No. EN-4611 to the cylinder heads.

Only lift the engine enough to take the weight
off the engine mounts, or damage to the
mounts and lifting equipment failure may
occur.
2 Using a commercially available engine lifting crane, have an assistant raise the engine far enough to remove the weight on the engine mounts and create a slight tension in the rubber.
3 Observe the engine mount while raising the engine.

4 Replace the engine mount if any of the following conditions are found:

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Engine Mechanical – V6 Page 6A1–183

• The hard rubber surface is covered with heat check cracks,
• The rubber is split through the centre of the engine mount, or
• The rubber is separated from the metal plate portion of the engine mount.

5 Remove the engine lift brackets, Tool No. EN-46114 from the engine.
Reinstall
The reinstallation procedure for the engine mounts is the reverse of the removal procedure, noting the following:
Ensure all fasteners are tightened to the correct torque specification.


Engine mount bracket to
cylinder block attaching bolt
torque specification
................................................................43.0 – 57.0 Nm
Engine mount to bracket attaching nut
torque specification
................................................................70.0 – 90.0 Nm
Engine mount to frame attaching nut
torque specification
................................................................44.0 – 60.0 Nm




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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–184

4 Major 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 thousandths of a millimetre. Consequently, when any engine component is to
be serviced, care and cleanliness are extremely important.
Prior to re-assembly of the V6 engine, all components must be cleaned and inspected in accordance with the
relevant procedures throughout this section, and replaced 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 lubricate the surfaces on initial operation.
When performing any service operation contained in this Section, 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 values must be used as
specified during reassembly to ensure correct retention of all components.
Through out this section, fastener torque wrench specifications may be accompanied with the following
identification marks:
■ Fasteners must be replaced after loosening.



Fasteners either have micro encapsulated sealant applied 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 alongside a fastener torque wrench specification, the
recommendation regarding that fastener must be adhered to.
4.1 Engine Removal
CAUTION
• Allow the engine to cool to at least 50 °
°°
°
C,
before attempting fastener removal.
• As aluminium has a greater rate of thermal
expansion than that of cast iron,
aluminium bolt hole threads will change
dimension to a larger extent than cast iron
bolt threads.
• If a bolt or other threaded component is
removed before the engine is allowed to
cool to at least 50 °
°°
°
C, threads could be
pulled from the cylinder block or cylinder
head.
• Do not use impact tools to remove bolts
during engine disassembly. While this may
be common practice with cast iron engine
components, use of these tools is likely to
pull the aluminium threads in the cylinder
block or head of this engine.

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Engine Mechanical – V6 Page 6A1–185

Remove
1 Remove the skid plate.
2 Drain the radiator coolant, refer to 6B1 Engine Cooling – V6.
3 Disconnect the battery negative and positive terminal, refer to 8A Electrical Body & Chassis.
4 Remove the battery from the vehicle.
5 Depressurise the fuel system pressure, refer to 6C Fuel System – V6.
6 Make alignment marks on the bonnet and hinges in order to return the bonnet to the exact original position.
7 Remove the bonnet, refer to 2B Sheet Metal.
8 Remove the rubber hose (2) and air duct (1).

Figure 6A1 – 317

9 Disconnect the barometric sensor connector (1).
Figure 6A1 – 318

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