2007 ISUZU KB P190 engine coolant

Engine Mechanical – V6 Page 6A1–252
Page 6A1–252
65 Remove the engine mount attaching nuts (1), (two
places) on the chassis si de of the left-hand and right-
hand engine mounts.


Figure 6A1 – 441
66 Slowly raise the engine using the engine hoist continue to lift and manoeuvre the engine assembly
clear of the engine compartment.

Figure 6A1 – 442
Disassemble
1 Remove the wiring harness connectors and ground connec tions from the engine and transmission assembly and
carefully set the wiring harness to one side, refer to Section 8A Electrical Body & Chassis.
2 Remove the engine control module (ECM) and mounting bracket, refer to Section 6C1-3 Engine Management – V6
– Service Operations .
3 Mount the engine assembly on a suitable engine stand.
5 Drain the engine oil into a suitable, clean container.
6 Remove the following components: a Oil filter adaptor, refer to 3.3 Oil Filter Adaptor.
b Engine coolant inlet pipe, refer to Section 6B1 Engine Cooling – V6.
c Heater pipe assembly, refer to Section 6B1 Engine Cooling – V6.
d Thermostat assembly, refer to Section 6B1 Engine Cooling – V6.
e Exhaust manifold a ssemblies, refer to 3.11 Exhaust Manifold Assembly .
f Engine coolant outlet pipe, refer to Section 6B1 Engine Cooling – V6.
g Crankshaft position sensor, refer to Section 6C1-3 Engine Management – V6 – Service Operations.
h Knock sensors, refer to Section 6C1-3 Engine Management – V6 – Service Operations.
i Engine mounts and brackets, refer to 3.23 Engine Mounts and Brackets.
j Flexplate assemblies, refer to 4.3 Flexplate Assembly.

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Engine Mechanical – V6 Page 6A1–253
Page 6A1–253
k Timing chains, tensioners, shoes, guides & sprockets, refer to 3.16 Timing Chains, Tensioners, Shoes and
Guides .
l Cylinder head assemblies, refer to 3.22 Cylinder Head Assembly.
m Oil pan assembly, refer to 4.2 Oil Pan and Oil Pump Suction Pipe Assembly .
n Piston and connecting rod assemblies, refer to 4.5 Pistons, Pins, Rings, Connecting Rods and Big-end
Bearings .
o Crankshaft assembly, refer to 4.6 Crankshaft and Main Bearings.
p Piston oil nozzles, refer 4.5 Pistons, Pins, Rings, Connecting Rods and Big-end Bearings .
Reassemble
Reassembly of the engine assembly is the reverse of the disassembly procedure.
Reinstall
Reinstallation of the engine assembly is the revers e to the removal procedure, noting the following:
NOTE
Refer to 6 Torque Wrench Specifications for the
correct torque specifications.
1 Tighten the fasteners to the co rrect torque specification.
Engine ground connector bolt
torque specificat ion ............................................ 10.0 Nm
Power steering high pressure line
attaching bolt torque specification ............. 8.0 – 12.0 Nm
Power steering high pressure line
flare nut torque specif ication ................... 25. 0 – 35.0 Nm
Engine mount to frame attaching bolt
torque specification ................................. 44. 0 – 60.0 Nm
Knock Sensor Attaching Nut
torque specification ............................................ 23.0 Nm
2 Use only the specified engine lubricant type and quantity. It is recommended that a fluorescent oil dye, such as that
contained in J 28481-B, be added to assist in any future oil leak diagnosis.
3 Fill the cooling system with the corre ct quantity and grade of coolant, refer to Section 6B1 Engine Cooling – V6.
4 Check transmission fluid level, replenishing as required, using the specified lubricant for the transmission fitted,
refer to Section 7C1 Automatic – 4L60E – General Information .
5 Disable the ignition system, refer to Section 6C1-3 Engine Management – V6 – Service Operations.
6 Crank the engine several times. Listen for any unusual noises or evidence that parts are binding.
7 Enable the ignition system. Start t he engine and listen for any unusual noises.
8 Check the vehicle oil pressure gauge or warning indica tor and confirm the engine has acceptable oil pressure. If
required, install an oil pressure gauge and m easure the engine oil pressure, refer to 2.19 Engine Oil Pressure
Diagnosis .
9 Run the engine at about 1,000 r. p.m. until the engine has reached normal operating temperature.
10 Listen for any unusual noises.
11 Check for oil, fuel, coolant and exhaust leaks wh ile the engine is running, correcting as required.
12 Perform a final inspection for correct engine oil and coolant levels.


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Engine Mechanical – V6 Page 6A1–294
Page 6A1–294
4 Remove the right-hand side M14 oil gallery threaded
plug (1).


Figure 6A1 – 529
5 Remove the right-hand side M14 coolant drain threaded plug (1).


Figure 6A1 – 530
6 Remove the rear M14 oil gallery threaded plug (1).


Figure 6A1 – 531

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Engine Mechanical – V6 Page 6A1–295
Page 6A1–295
7 Remove the left-hand side M14 coolant drain
threaded plug (1).


Figure 6A1 – 532
8 Remove the left-hand side M20 oil gallery threaded plug (1).


Figure 6A1 – 533
CAUTION
Do not force coolant expansion plugs
downwards during removal procedure as the
cylinder block will be damaged.
9 Remove the coolant expansion plugs (1).



Figure 6A1 – 534

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–300
Page 6A1–300
4 Place RTV sealant on new coolant expansion plugs
(1) and install the new coolant expansion plugs.

Figure 6A1 – 543
5 Install the left-hand side M20 oil gallery threaded plug (1) and tighten to the correct torque specification.




Left-hand side M20 cylinder block
oil gallery threaded plug
torque specificatio n ................................. 27. 0 – 35.0 Nm

Figure 6A1 – 544
6 Install the left-hand side M14 coolant drain threaded
plug (1) and tighten to the co rrect torque specification.




Left-hand side M14 cylinder block
coolant drain threaded plug
torque specificatio n ................................. 27. 0 – 35.0 Nm

Figure 6A1 – 545

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Engine Mechanical – V6 Page 6A1–301
Page 6A1–301
7 Install the M14 rear oil gallery threaded plug (1) and
tighten to the correct torque specification.




M14 cylinder block rear oil gallery
threaded plug torque specif ication .......... 27.0 – 35.0 Nm


Figure 6A1 – 546
8 Install the right-hand side M14 coolant drain threaded
plug (1) and tighten to the co rrect torque specification.




Right-hand side M14 cylinder block
coolant drain threaded plug
torque specificatio n ................................. 27. 0 – 35.0 Nm


Figure 6A1 – 547
9 Install the right-hand side M14 oil gallery threaded plug (1) and tighten to the co rrect torque specification.




Right-hand side M14 cylinder block
oil gallery threaded plug
torque specificatio n ................................. 27. 0 – 35.0 Nm


Figure 6A1 – 548

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ISUZU KB P190 2007

Engine Mechanical – V6 Page 6A1–309
Page 6A1–309
NOTE
The driver installation tool will tighten up before
cutting completely through the insert. This is
acceptable. The threads at the bottom of the
insert are being formed and the insert is
mechanically locking the insert into the base
material threads.
15 Continue to rotate the driver installation tool (1) through the insert (2)
16 Remove the driver installation tool.

Figure 6A1 – 569
17 Inspect the insert for co rrect installation into the
tapped hole. A correctly installed insert (1) will be
either flush or slightly below flush with the surface of
the base material (2).

Figure 6A1 – 570
18 Any installed insert that restricts or blocks an oil or
engine coolant passage (3) will need to have the oil or
engine coolant passage drilled out (4) to the original
size of the oil or engine c oolant passage. After drilling
the restriction or block age, clean out any swarf and
thread the installation driver tool through the insert
again to remove any burrs caused by the drilling of
the oil or engine coolant passage.

Figure 6A1 – 571

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ISUZU KB P190 2007

Engine Cooling – V6 Engine Page 6B1–1

Section 6B1
Engine Cooling – V6
ATTENTION
Before performing any Service Operation or other procedure described in this Section, refer to 1.1 WARNING,
CAUTION and NOTES for correct workshop practices with regard to safety and/or property damage.
1 General Information ............................................................................................................ ...................3
1.1 WARNING, CAUTION and NOTES ..................................................................................................... ................... 4
1.2 Definition of WARNING, CAUTION and NOTE Statements ......................................................................... .. 4
WARNING defined ............................................................................................................................................. 4
CAUTION defined .............................................................................................................................................. 4
NOTE defined..................................................................................................................................................... 4
2 General Description ............................................................................................................ ...................5
2.1 Radiator Assembly .............................................................................................................. .................................. 5
2.2 Cooling Fan – Standard Specification.................................................................................................................. 7
Overview ................................................................................................................................................................. 7
Cooling Fan and Shroud Assembly ................................................................................................ .................... 8
Fan Motor ........................................................................................................................................................... 8
Fan Operation .................................................................................................................. .................................. 8
V6 Cooling Fan Wiring Diagram .................................................................................................. ....................... 9
Fan Assembly connector .................................................................................................................................. 10
2.3 Coolant Pump....................................................................................................................................................... 10
2.4 Coolant Outlet Housing ......................................................................................................... .............................. 11
2.5 Thermostat ........................................................................................................................................................... 11
2.6 Coolant Filler Cap ............................................................................................................. ................................... 13
2.7 Coolant Recovery Reservoir ..................................................................................................... .......................... 14
2.8 Engine Coolant Temperature Sensor .............................................................................................. ................... 15
3 Service Operations ...............................................................................................................................16
3.1 Service Notes ....................................................................................................................................................... 16
Safety .................................................................................................................................................................... 16
Periodic Servicing............................................................................................................. ................................... 16
Environmental Issues ........................................................................................................... ............................... 16
3.2 Coolant Maintenance ........................................................................................................................................... 17
Topping Up the Cooling System.................................................................................................. ....................... 18
Testing Coolant Concentration........................................................................................................................... 18
Method 1 – Refractometer................................................................................................................................ 18
Method 2 – Hydrometer.................................................................................................................................... 21
3.3 Draining and Filling Cooling System ............................................................................................ ..................... 22
Draining ................................................................................................................................................................ 22
Filling .................................................................................................................................................................... 22
3.4 Cleaning Cooling System ........................................................................................................ ............................ 25
Cooling System Reverse Flush ................................................................................................... ....................... 25
Radiator............................................................................................................................................................ 25
Engine .............................................................................................................................................................. 26
Heater Hoses and Core.......................................................................................................... .......................... 27
3.5 Drive Belt Tension ............................................................................................................................................... 28
Inspect .................................................................................................................................................................. 29
3.6 Coolant Hoses ...................................................................................................................................................... 30
3.7 Pressure Testing ............................................................................................................... ................................... 31
Coolant Filler Cap Pressure Testing ............................................................................................ ...................... 31

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