2007 ISUZU KB P190 cooling

ENGINE MECHANICAL 6A – 5
Engine model
Item 4JA1T (L)
4JA1TC
Cooling system
W ater pump type Centrifugal
Thermostat type W ax pellet with jiggle valve
Air cleaner type Dry paper element Viscous paper element
Battery type/voltage × No. of units 80D26L × 1

95D31L × 1 (OPT)
Generator capacity V-A12 – 60
12 – 80
Starter motor output V-kW12 – 2.3
Turbocharger model
Turbine type
Compressor type *IHI RHF 4H
Mixed flow type
Backward & rake

*IHI: Ishikawajima-Harima Heavy Industries., Ltd.


BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

ENGINE MECHANICAL 6A – 7

Engine model
Item 4JH1TC
Cooling system
W ater pump type
Thermostat type
Air cleaner type

Battery type/voltage × No. of units



Generator capacity V-A
Starter motor output V-kW
Turbocharger model Turbine type
Compressor type
Centrifugal
W ax pellet with jiggle valve
Dry paper element (except for Euro3 spec) Viscous paper element (for Euro3 spec)
80D26L × 1
95D31L × 1 (OPT)
75D26R × 2 (OPT for EC, MT)
80D26R × 2 (OPT for EC, AT)
12 – 60/12 – 80 12 – 2.3
*IHI RHF5
Mixed flow type Radial-inflow
Backward & rake type Radial-outflow
*IHI: Ishikawajima-Harima Heavy Industries., Ltd.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

6A – 12 ENGINE MECHANICAL
Cooling and Lubricating System
N·m (kg·m/lb·ft)





RTW 46AXF000701

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

ENGINE MECHANICAL 6A – 27
111R300001


COOLING SYSTEM
Coolant Level
Check the coolant level and replenish the radiator reserve
tank as necessary.
If the coolant level falls below the “MIN” line, carefully
check the cooling system for leakage. Then add enough
coolant to bring the level up to the “MAX” line.



Engine coolant Filling up procedure
1. Make sure that the engine is cool.
Warning:
When the coolant is heated to a high temperature, be
sure not to loosen or remove the rediator cap.
Otherwise you might get scalded by hot vapor or
boiling water.
To open the radiator cap, put a piece of thick cloth on
the cap and loosen the cap slowly to reduce the
pressure when the coolant has become cooler.
2. Open rediator cap pour coolant up to filler neck
3. Pour coolant into reservoir tank up to “MAX” line
4. Tighten radiator cap and start the engine. After idling for 2 to 3 minutes, stop the engine and reopen radiator
cap. If the water level is lower, replenish.
5. After replenish the coolant tighten radiator cap, warm up the engine at about 2000 rpm. Set heater
adjustment to the highest temperature position, and let
the coolant circulate also into heater water system.
6. Check to see the thermometer, continuously idling 5 minutes and stop the engine.
7. W hen the engine has been cooled, check filler neck for water level and replenish if required. Should
extreme shortage of coolant is found, check the
coolant system and reservoir tank hose for leakage.
8. Pour coolant into the reservoir tank up to “MAX” line.
Engine Coolant Total Capacity Lit (U.S / UK gal)

4JA1 / TC 9.4 (2.5 / 2.1)
4JH1TC M/T: 10.1 (2.7 / 2.2)
A/T: 10.0 (2.6 / 2.2)
Mixing Ratio (Anti-Freeze Solution/W ater)
50 %


BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

6A – 28 ENGINE MECHANICAL


Cooling System Inspection
Install a radiator filler cap tester to the radiator. Apply
testing pressure to the cooling system to check for
leakage. The testing pressure must not exceed the
specified pressure.

Testing Pressure kPa(kg/cm
2 /psi)
150 (1.5/21)



Radiator Cap Inspection
The radiator filler cap is designed to maintain coolant
pressure in the cooling system at 103 kPa(1.05 kg/cm2,
15psi).
Check the radiator filler cap with a radiator filler cap tester.
The radiator filler cap must be replaced if it fails to hold the
specified pressure during the test procedure.
Radiator Cap Valve Opening Pressure
kPa(kg/cm
2 /psi)
90 – 120 (0.9 – 1.2/13 – 17)

Negative Valve (Reference) kPa(kg/cm2 /psi)
1.9 – 4.9 (0.02 – 0.05/0.28 – 0.71)
030LX003
030LX002

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

ENGINE MECHANICAL 6A – 29


Thermostat Operating Test
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)
Oil Cooler Thermo Valve °C ( °F)
76.5 (170)
EGR Cooler Thermo Valve °C ( °F)
40 (104)

4. Check the thermostat full opening temperature.
Thermostat Full Opening Temperature °C ( °F)
95 (203)
Oil Cooler Thermo Valve °C ( °F)
90 (194)
EGR Cooler Thermo Valve °C ( °F)
55 (131)
Valve Lift at Fully Open position mm (in)
9.5 (0.37)
Oil Cooler Thermo Valve mm (in)
4.5 (0.18)
EGR Cooler Thermo Valve mm in)
3.5 (0.14)



Drive Belt Adjustment
Check drive belts for wear or damage, and replace with
new ones as necessary. Check belts for tension, and
adjust as necessary.
1 Crankshaft damper pulley
2 Generator pulley
3 Cooling fan pulley
4 Oil pump pulley or idler pulley
5 Compressor pulley or idler pulley


030LX014
033RY00002

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

6A – 30 ENGINE MECHANICAL


Cooling Fan Pulley Drive Belt
Fan belt tension is adjusted by moving the generator.
Depress the drive belt mid-portion with a 98N (10 kg/22 lb)
force.
Cooling Fan Drive Belt Deflection mm (in)
New belt 4 - 7 (0.16 - 0.28)
Reuse belt 6 - 9 (0.24 - 0.35)
1 Crankshaft damper pulley
2 Generator pulley
3 Cooling fan pulley




A/C Compressor Drive Belt
Compressor belt tension is adjusted by moving the P/S
pumppulley.
Depress the drive belt mid-portion with a 98N (10 kg/22 Ib)
force.
A/C Compressor Drive Belt Deflection mm (in)
New belt 9 - 10 (0.35 - 0.39)
Reuse belt 12 - 13 (0.47 - 0.51)
1 Crankshaft damper pulley
2 P/S pump pulley
2 A/C Compressor pulley
033RY00003
033RY00004

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

ENGINE MECHANICAL 6A – 41

















































Coolant Replenishment
Warning:
When the coolant is heated to a high temperature, be
sure not to loosen or remove the rediator cap.
Otherwise you might get scalded by hot vapor or
boiling water.
To open the radiator cap, put a piece of thick cloth on
the cap and loosen the cap slowly to reduce the
pressure when the coolant has become cooler.
1. Open rediator cap pour coolant up to filler neck
2. Pour coolant into reservoir tank up to "MAX" line
3. Tighten radiator cap and start the engine. After idling for 2 to 3 minutes, stop the engine and reopen radiator
cap. If the water level is lower, replenish.
4. After replenish the coolant tighten radiator cap, warm up the engine at about 2000 rpm. Set heater
adjustment to the highest temperature position, and let
the coolant circulate also into heater water system.
5. Check to see the thermometer, continuously idling 5 minutes and stop the engine.
6. W hen the engine has been cooled, check filler neck for water level and replenish if required. Should extreme
shortage of coolant is found, check the coolant system
and reservoir tank hose for leakage.
7. Pour coolant into the reservoir tank up to "MAX" line.
Coolant Capacity lit (US/UK gal)

4JA1 / TC 9.4 (2.5 / 2.1)
4JH1TC M/T: 10.1 (2.7 / 2.2)
A/T: 10.0 (2.6 / 2.2)
























Engine Warm-Up
After completing the required maintenance procedures,
start the engine and allow it to idle until it is warm.
Check the following:
1. Engine idling speed.
2. Engine noise level.
3. Engine lubricating system and cooling system. Carefully check for oil and coolant leakage.
4. Clutch engagement.
5. Transmission operation.
6. Indicator warning light operation.



BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007