2007 ISUZU KB P190 Electrical

Engine Cooling – V6 Engine Page 6B1–35

9 To gain easier access to the heater pipe flange and
thermostat housing bolts, disconnect the engine
harness and lay back on the right side of the engine
bay. Apart from those harness connectors removed
during the intake manifold removal, this involves the
removal of wiring harness connectors and fasteners,
as detailed:
a Pull out the release bar (arrows) on each of the ignition coil packs (1) on cylinders 2, 4 and 6,
before disconnecting each connector.
b The coolant temperature sensor.
c The left side Pre-O2 sensor connector, 2, 4 & 6.
NOTE
Refer to 8A – Electrical Body & Chassis for the
location of harness connectors, not shown.

Figure 6B1 –
––
–
34
10 Remove the bolt (1) securing the engine harness ground terminal (2), to the cylinder block.
11 Prise both locking legs of the left side engine harness former (4), free, then lift up on the harness former to
release.

Figure 6B1 –
––
–
35
12 W orking at the rear of the engine, disconnect the engine harness to transmission harness connector (1),
as required.
13 Remove the two bolts (2) securing the engine harness former (3) to the rear of the engine.
14 Carefully lift the engine harness free and drape on the right side of the engine.


NOTE
For further information on removing the
thermostat housing and associated components,
refer to 6A1 Engine Mechanical – V6.
Figure 6B1 –
––
–
36

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Engine Cooling – V6 Engine Page 6B1–39

18 Check for coolant leaks. Refer to 3.7 Pressure Testing in this Section.
19 Install the radiator shroud.
20 Install the engine dress covers. Refer to 6A1 Engine Mechanical.
21 Reconnect battery ground lead. Refer to 8A_ Electrical Body & Chassis.
22 Road test the vehicle to check for correct operation.
3.9 Coolant Recovery Reservoir
Remove

Figure 6B1 – 41
Legend
1 Filler Cap
2 Reservoir

Remove the reservoir assembly attaching screws, and remove the reservoir assembly from the vehicle.
Inspect
1 Drain contents from reservoir assembly.
2 Clean the reservoir assembly with water and dry using compressed air.
3 Check reservoir and assembly for damage, for example abrasions, cracks or distortion. Replace if required.
Install
Installation of the reservoir assembly is the reverse of removal procedures, noting the following points:

1 Refill cooling recovery reservoir and cooling system with the correct concentration of coolant. Refer to 3.3 Draining and Filling Cooling System in this Section.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Engine Cooling – V6 Engine Page 6B1–40

2 Check coolant recovery system for leaks.
3.10 Coolant Pump
Remove

Refer to 3.1 Service Notes in this Section, for
important safety items.
NOTE
The coolant pump is not to be disassembled and
is replaced only as an assembly.
1 Allow engine to cool to ambient temperature (less than 50 ° C), and then remove the coolant filler cap (located at
the front left-hand side of the engine).

Disconnection of the battery affects certain
vehicle electronic systems. Refer to 1.1
WARNING, CAUTION and NOTES, before
removing the ground lead.
2 Disconnect the battery ground lead. Refer to 8A – Electrical Body & Chassis.
3 Loosen coolant pump pulley to hub bolts (1).
NOTE
While the view shows the drive belt removed,
it will be easier to loosen the four pulley bolts,
with the belt installed.

Figure 6B1 – 42

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Engine Cooling – V6 Engine Page 6B1–44

5 Install coolant pump pulley and attaching bolts (1).
6 Install drive belt (reverse to removal procedures) and ensure that the drive belt is aligned with all accessory
pulleys and crankshaft balancer drive belt grooves.
NOTE
Refer to Figure 6B1 – 43, as required for the
correct drive belt routing.
7 Tighten coolant pump pulley attaching bolts (1) to the correct torque specification.
Coolant pump pulley to hub
bolt torque specification ...................................12 N.m
8 Close the radiator drain tap on the lower LHS of the radiator and remove the piece of rubber tubing to the
tap outlet.
Figure 6B1 – 49
9 Refill cooling system. Refer to 3.3 Draining and Filling Cooling System in this Section.
10 Check for coolant leaks. Refer to 3.7 Pressure Testing in this Section.
11 Install the radiator shroud.
12 Reconnect battery ground lead. Refer to 8A – Electrical Body & Chassis.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Engine Cooling – V6 Engine Page 6B1–45

3.11 Coolant Outlet Housing
Remove

Refer to 3.1 Service Notes in this Section, for
important safety items.
1 Allow engine to cool to ambient temperature (less than 50 ° C), and then remove the coolant filler cap (located at
the front left-hand side of the engine).

Disconnection of the battery affects certain
vehicle electronic systems. Refer to 1.1
WARNING, CAUTION and NOTES, before
removing the ground lead.
2 Disconnect the battery ground lead. Refer to 8A – Electrical Body & Chassis Battery.
3 Drain the coolant from the system. Refer to 3.3 Draining and Filling Cooling System.
4 Remove the complete intake manifold assembly. Refer to 6A1 Engine Mechanical.

Always wear protective safety glasses when
working with spring type hose clamps. Failure
to do so could result in eye injury.
5 Remove upper radiator hose clamp (1) at the coolant outlet housing connection (2), disconnect
hose from coolant outlet.

Figure 6B1 – 50

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Engine Cooling – V6 Engine Page 6B1–46

6 Remove the two coolant outlet housing attaching
bolts (1), and remove coolant outlet housing (2).
7 Remove and discard coolant outlet housing O-ring (3) and seal (4).

Figure 6B1 – 51
Reinstall
1 Ensure that the coolant outlet housing and front outlet mating surfaces are clean and dry.
2 Install new O-ring and seal to coolant outlet housing.
3 Install coolant outlet housing and attaching bolts. Tighten all bolts to the correct torque specification.
Coolant outlet housing to front
outlet bolt torque specification..............................10 N.m

Always wear protective safety glasses when
working with spring type hose clamps. Failure
to do so could result in eye injury.
4 Connect the upper radiator hose and clamp to the coolant outlet housing connection.
5 Close the radiator drain tap on the lower RHS of the radiator and remove the piece of rubber tubing to the tap outlet.
6 Reinstall the intake manifold assembly. Refer to 6A1 Engine Mechanical.
7 Refill cooling system. Refer to 3.3 Draining and Filling Cooling System in this Section.
8 Check for coolant leaks. Refer to 3.7 Pressure Testing in this Section.
9 Reconnect battery ground lead. Refer to 8A – Electrical Body & Chassis.
3.12 Coolant Inlet Pipe
Remove

Refer to 3.1 Service Notes in this Section, for
important safety items.
1 Allow engine to cool to ambient temperature (less than 50 ° C), and then remove the coolant filler cap (located at
the front left-hand side of the engine).

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Engine Cooling – V6 Engine Page 6B1–47


Disconnection of the battery affects certain
vehicle electronic systems. Refer to 1.1
WARNING, CAUTION and NOTES, before
removing the ground lead.
2 Disconnect the battery ground lead. Refer to 8A – Electrical Body & Chassis.

Refer to ‘
‘‘
‘
Environmental Issues ’
’’
’
in 3.1
Service Notes, before draining the coolant.
3 Draining the coolant from the system. Refer to 3.3 Draining and Filling Cooling System in this Section.
4 Raise the front of the vehicle and support on safety stands. Refer to 0A General Information for the location of jacking and support points.

Always wear protective safety glasses when
working with spring type hose clamps.
Failure to do so could result in eye injury.
5 Remove lower radiator outlet hose clamp (1) at the coolant inlet pipe connection, then disconnect the
hose from coolant inlet pipe (2).
6 Remove the coolant inlet pipe from the engine block by removing the attaching bolt (3).

Figure 6B1 –
––
–
52
7 Remove the coolant inlet pipe (1) to thermostat housing (2) attaching bolt (3).
8 Remove the coolant inlet pipe by manoeuvring the pipe to the front of the vehicle and withdrawing the
pipe from below the vehicle, between the cross
member and radiator.
9 Remove and discard coolant inlet pipe O-ring (4) from the thermostat end of the coolant inlet pipe.

Figure 6B1 –
––
–
53

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Engine Cooling – V6 Engine Page 6B1–48

Install
1 Ensure that the coolant inlet pipe and thermostat housing mating surfaces are clean and dry.
2 Install new O-ring to the coolant inlet pipe.
3 Install coolant inlet pipe at the thermostat housing and secure with the attaching bolt. Tighten all bolts to the correct torque specification.
Coolant inlet pipe to thermostat
housing bolt torque specification ..........................23 N.m
4 Raise the front of the vehicle and support on safety stands. Refer to 0A General Information for the location of jacking and support points.
5 Reinstall the coolant inlet pipe to the engine block and secure with the bolt tightened to the correct torque specification.
Coolant inlet pipe to engine block bolt
torque specification .............................................25 N.m

Always wear protective safety glasses when
working with spring type hose clamps. Failure
to do so could result in eye injury.
6 Connect the lower radiator outlet hose and clamp to the coolant inlet pipe connection.
7 Close the radiator drain tap on the lower RHS of the radiator and remove the piece of rubber tubing to the tap outlet.
8 Lower the front of the vehicle.
9 Refill cooling system. Refer to 3.3 Draining and Filling Cooling System in this Section.
10 Check for coolant leaks. Refer to 3.7 Pressure Testing in this Section.
11 Reconnect battery ground lead. Refer to 8A – Electrical Body & Chassis.

3.13 Cooling Fan and Shroud Assembly
Remove

Disconnection of the battery affects certain
vehicle electronic systems. Refer to 1.1
WARNING, CAUTION and NOTES, before
removing the ground lead.
1 Disconnect the battery ground lead. Refer to 8A – Electrical Body & Chassis.
2 Remove the intake duct and mass air flow as an assembly. Refer to 6A1 Engine Mechanical.
3 Remove the coolant recovery hose from the fan shroud retaining clip.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007