2007 ISUZU KB P190 torque

Engine Mechanical – V6 Page 6A1–212
Page 6A1–212
12 Tighten the camshaft bearing cap bolts to the correct
torque specification and in the sequence shown.

Camshaft bearing cap
bolt torque specification:
Stage 1: .................................................... 8.0 – 12.0 Nm
13 Loosen the centre intake camshaft bearing cap bolts
1, and 2, and the centre exhaust camshaft bearing
cap bolts 3 and 4.
14 Retighten the centre camsha ft bearing cap bolts 1, 2,
3 and 4 to the correct torque specification.

Camshaft bearing cap
bolt torque specification:
Stage 2: .................................................... 8.0 – 12.0 Nm
15 Install the right-hand cylinder head camshaft
sprocket, refer to 3.18 Camshaft Sprocket .

Figure 6A1 – 357

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Engine Mechanical – V6 Page 6A1–223
Page 6A1–223
Cylinder Head Measurement
NOTE
For all cylinder head and associated component
specifications, refer to 5 Specifications.
Camshaft Journal Clearance
1 Install the camshaft bearing cap in the cylinder head without the camshaft.
2 Install the camshaft cap bolts and tight en to the correct torque specification
Camshaft bearing cap attach ing bolt........ 8.0 – 12.0 Nm.
3 Measure the camshaft bearings using an inside micrometer.
4 Subtract the camshaft journal diam eter from the camshaft bearing diameter. This will provide the running
clearance. If the running clearance exceeds specifications and the camshaft journals are within specification,
replace the cylinder head.
Camshaft Journal Alignment
1 Ensure the camshafts are serviceable, refer to 3.19 Camshaft for measuring procedures.
2 Inspect the cylinder head camshaft bearing surfaces for any imperfections or scratches that could inhibit correct
camshaft clearances. Repair minor imperfections or scratches.
3 Install the camshafts in the cylinder head.
4 Install the camshaft bearing caps.
5 Install the camshaft cap bolts and tighten to the correct torque specification.
Camshaft bearing cap attach ing bolt........ 8.0 – 12.0 Nm.
6 Ensure the camshafts spin freely in the cylinder head. If the camshaft does not run freely, replace the cylinder
head.
Deck Flatness Inspection
1 Ensure the cylinder head decks are clean and free of gasket material.
2 Inspect the surface for any imperfections or scratches
that could inhibit correct cylinder head gasket sealing.
3 Place a straight-edge (1) diagonally across the cylinder head (2) deck face surface.
4 Measure the clearance between the straight-edge
and the cylinder head deck face using a feeler gauge
at four points along the straight-edge.
5 If the warpage is less t han 0.05 mm, the cylinder
head deck surface does not require resurfacing.
6 If the warpage is between 0.05±0.20 mm or any imperfections or scratches that could inhibit correct
cylinder head gasket sealing are present, the cylinder
head deck surface requires resurfacing.
7 If resurfacing is requir ed the maximum amount that
can be removed is 0.25 mm.
8 If the cylinder head deck surface requires more than 0.25 mm material removal the head must be
replaced.

Figure 6A1 – 378

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–230
Page 6A1–230
Assemble
1 Install the cylinder head coolant threaded plugs (1)
and tighten to the correct torque specification.




Cylinder head thre aded plug .............................. 31.0 Nm


Figure 6A1 – 388
2 Install the cylinder head oil gallery expansion plugs (1).

Figure 6A1 – 389
CAUTION
• Never reuse a valve stem oil seal. Always
use new seals when assembling the
cylinder head.
• Force should only be applied to the valve
spring contact area of the new valve stem
oil seal during installation.
3 Fit the valve stem oil seal s onto the guides using Tool
No. EN-46116 (1).
4 Push and twist the valve stem oil seal into position on the valve guide until the s eal positively locks on the
guide using Tool No. EN-46116.
5 Lubricate the valve stem and valve guide ID with clean engine oil.


Figure 6A1 – 390

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–233
Page 6A1–233
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 – 396
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 – 397
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 – 398

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–234
Page 6A1–234
„ Cylinder head M11 attaching bolt
torque specification:
Stage 1:............. 40.0 – 50.0 Nm
Stage 2:.............................. 120°


Figure 6A1 – 399
Left-hand Side (Bank 2) Cylinder Head
The reinstallation procedure for the left-hand side cylinder head a ssembly 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 – 400
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 – 401

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Engine Mechanical – V6 Page 6A1–235
Page 6A1–235
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 – 402
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 – 403

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–238
Page 6A1–238
4 Replace the engine mount if any of the following conditions are found:
• The hard rubber surface is cove red with heat check cracks,
• The rubber is split through the centre of the engine mount, or
• The rubber is separated from the me tal 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 engi ne 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 6A1–239
Page 6A1–239
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 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 V6 engi ne, 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 lubr icate 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 fricti on 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 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.
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 th ese tools is likely to
pull the aluminium threads in the cylinder
block or head of this engine.

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