2007 ISUZU KB P190 engine coolant

ENGINE COOLING 6B – 11
Inspection and Repair
The water pump is not disassembled type.
Make necessary parts replacement if extreme wear or
damage is found during inspection. Should any of the
following problems occur, the entire water pump assembly
must be replaced.
・ Cracks in the water pump body
・ Coolant leakage from the seal unit
・ Excessive radial play or abnormal noise in the fan center
when rotate by hand
・ Excessive thrust play in the fan center (Standard play: less
than 0.2mm)
・ Cracks or corrosion in the impeller





























Installation
1. Water Pump
1) Install the water pump with new gasket.
2) Tighten bolts and nuts to specified torque.
W ater Pump Bolt/Nut Torque N·m(kg·m/lb ft)
20 (2.0/14)

2. Fan Drive Belt and Pulley
1) Install the fan drive belt and fan pulley.
2) Apply tension to the fan drive belt by moving the generator.
3) Apply a force of 98N(10kg/22 lb) to the drive belt mid- portion to check the drive belt deflection.
Fan Drive Belt Deflection mm (in)
New belt: 4-7(0.16-0.28)
Reuse belt: 6-9(0.24-0.35)
030R300002


030R300001














3. Fan and Fan Clutch
1) Install the fan and fan clutch to pulley.
2) Tighten the nuts to specified torque.
Fan Clutch Nut Torque N·m(kg·m/lb in)
8(0.8/69)

4. Upper Fan Shroud

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ISUZU KB P190 2007

6B – 12 ENGINE COOLING



031R300003
5. Thermostat
Install the thermostat to the thermostat housing.
6. Water Outlet Pipe
1) Install the water outlet pipe with new gasket to the thermostat housing.
2) Tighten the outlet pipe bolt to specified torque.
Outlet Pipe Bolt Torque N·m(kg·m/lb ft)
19(1.9/14)

3) Connect the turbocharger-cooling pipe to outlet pipe.
7. Radiator Upper Hose 1) Connect the radiator upper hose to the water outlet pipe.
2) The knob of clamp shall be dircted to holizonal side.
3) Replenish the engine coolant.




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ENGINE COOLING 6B – 13
THERMOSTAT
REMOVAL AND INSTALLATION
Read this Section carefully before performing any removal and installation procedure. This Section gives you
important points as well as the order of operation. Be sure that you understand everything in this Section before you
begin.


Removal
1. Radiator Upper Hose 1) Partially drain the engine coolant.
2) Remove the radiator upper hose.


2. Water Outlet Pipe 3) Disconnect the turbocharger-cooling pipe from outlet pipe.
4) Loosen the fixing bolt and remove the water outlet bolt.
3. Thermostat
Remove the thermostat from the thermostat housing.
Take care not to damage the thermostat.

031R300003

Inspection and Repair
Make the necessary adjustments, repairs, and part
replacements if excessive wear or damage is discovered
during inspection.


031RY00005
Operating Test of Thermostat
1. Completely submerge the thermostat in water.
2. Heat the water. Stir the water constantly to avoid direct heat being
applied to the thermostat.
3. Check the thermostat initial opening temperature.
Thermostat Initial Opening Temperature °C ( °F)
82 (180)

4. Check the thermostat full opening temperature.
Thermostat Full Opening Temperature °C ( °F)
95 (203)

Valve Lift At Fully Open Position mm (in)
9.5 (0.37)


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6B – 14 ENGINE COOLING
c Thermometer
d Agitating rod
e W ooden piece
















Installation
1. Thermostat
Install the thermostat to the thermostat housing.
2. Water Outlet Pipe
3) Install the water outlet pipe with new gasket to the thermostat housing.
4) Tighten the outlet pipe bolt to specified torque.
Outlet Pipe Bolt Torque N·m(kg·m/lb ft)
19(1.9/14)

5) Connect the turbocharger-cooling pipe to outlet pipe.
031R300003


3. Radiator Upper Hose 1) Connect the radiator upper hose to the water outlet pipe.
2) The knob of clamp shall be directed to holizonal side.
3) Replenish the engine coolant.



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ISUZU KB P190 2007

ENGINE COOLING 6B – 17
Inspection and Repair
Make the necessary adjustments, repairs, and part
replacements if excessive wear or damage is discovered
during inspection.


Radiator Cap
Measure the valve opening pressure of the pressurizing valve
with a radiator filler cap tester.
Replace the cap if the valve opening pressure is outside the
standard range.
Valve opening pressure kPa (psi) 93.3
∼
∼∼
∼122.7 (13.5
∼
∼∼
∼17.8)
Cap tester: 5–8840–0277–0
Adapter: 5–8840–2603–0
Check the condition of the vacuum valve in the center of the
valve seat side of the cap. If considerable rust or dirt is found,
or if the valve seat cannot be moved by hand, clean or replace
the cap.





110RS006

Valve opening vacuum kPa (psi) 1.96 ∼
∼∼
∼ 4.91 (0.28 ∼
∼∼
∼ 0.71)


Radiator Core
1. A bent fin may result in reduced ventilation and overheating
may occur. All bent fins must be straightened. Pay close
attention to the base of the fin when it is being straightened.
2. Remove all dust, bugs and other foreign material.

Flushing the Radiator
Thoroughly wash the inside of the radiator and the engine
coolant passages with cold water and mild detergent. Remove
all signs of scale and rust.

Cooling System Leakage Check
Use a radiator cap tester to force air into the radiator through
the filler neck at the specified pressure of 196 kPa (28.5 psi)
with a cap tester:
• Leakage from the radiator
• Leakage from the coolant pump
• Leakage from the water hoses

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ENGINE COOLING 6B – 19




RTW 36BSH000101
8. Pour engine coolant up to filler neck of radiator, and up to
MAX mark of reserve tank.

Important operation (in case of 100% engine coolant change) procedure for filling with engine coolant.


Engine coolant change
Refer to 6B-8 (Draining and Refilling Cooling System).



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Engine Control System (4JH1) 6E-3
Rough, Unstable, or In co rr ect Idle And
Stallin g........................................................... .6E -260
Cut Out, Mi sses.............................................. .6E -262
Su rge s/Chuggle s............................................ .6E -263
La ck of Po wer, Sluggi shne ss, Spongine ss .... .6E -266
He sitation, Sag, Stu mble................................ .6E -268
Fuel Kno ck /Co mbu stion Noi se ....................... .6E -270
Poor F uel E cono my........................................ .6E -271
E xc ess ive S moke (B la ck S m oke) ................. .6E -272
E xc ess ive S moke (W hite S moke) ................. .6E -273
Repair In str u ctions ............................................ .6E -275
Engine Control Module (ECM) Replacement ..6E-275
Service Programming System (SPS)
Description .....................................................6E-276
Service Programming System (SPS)
(Remote Procedure) ......................................6E-277
Service Programming System (SPS)
(Pass-Thru Procedure) ..................................6E-278
Accelerator Pedal Position (APP) Sensor
Replacement ..................................................6E-279
Crankshaft Position Sensor (CKP) Sensor
Replacement ..................................................6E-279
EGR Solenoid Valve Replacement .................6E-280
Engine Coolant Temperature Coolant
(ECT) Sensor Replacement ...........................6E-280
Mass Air Flow (MAF) / Intake Air Temperature
Sensor Replacement......................................6E-280
Turbocharger Solenoid Valve Replacement
[High Altitude Spec] ........................................6E-281
Vacuum Pressure Sensor Replacement
[High Altitude Spec] ........................................6E-281
Vehicle Speed Sensor (VSS) Replacement ....6E-282
Description And Operation .................................6E-283 Engine Control Module (ECM) .......................6E-283
Engine Control Component Description ..........6E-284
Fuel Injection System Description ...................6E-288
Low Pressure Fuel Circuit Description ............6E-290
High Pressure Fuel Circuit Description ...........6E-291
Timing Control Device Description ..................6E-294
Exhaust Gas Recirculation (EGR) System
Description .....................................................6E-297
Turbocharger Description................................6E-298
Special Tools And Equipment ............................6E-299 Special Tools and Equipment .........................6E-299


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6E-4 Engine Control System (4JH1)
Specifications
Temperature vs Resistance
Engine Coolant Temperature vs. Resistance
°C °F Ohms
Temperature vs. Resistance Value (Approximately)
120 248 120
110 230 160
100 212 200
90 194 260
80 176 350
70 158 470
60 140 640
50 122 880
40 104 1250
30 86 1800
20 68 2650
10 50 4000
0 32 6180
-10 14 9810
-20 -4 16000
-30 -22 27000
Intake Air Temperature vs. Resistance
°C °F Ohms
Temperature vs. Resistance Value (Approximately)
100 212 190
90 194 240
80 176 320
70 158 430
60 140 590
50 122 810
40 104 1150
30 86 1650
25 77 2000
20 68 2430
10 50 3660
0 32 5650
-10 14 8970
-20 -4 14700

Altitude vs Barometric Pressure
Altitude Measured
in Meters (m) Altitude
Measured in Feet (ft) Barometric
Pressure
Measured in
Kilopascals (kPa)
Determine your altitude by contacting a local weather
station or by using another reference source.
4267 14000 56-64
3962 13000 58-66
3658 12000 61-69
3353 11000 64-72
3048 10000 66-74
2743 9000 69-77
2438 8000 71-79
2134 7000 74-82
1829 6000 77-85
1524 5000 80-88
1219 4000 83-91
914 3000 87-98
610 2000 90-98
305 1000 94-102
0 0 Sea Level 96-104
-305 -1000 101-105




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