2007 ISUZU KB P190 Workshop Repair Manual

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Page 2105 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE COOLING 6B-1
SECTION 6B
ENGINE COOLING
TABLE OF CONTENTS
PAGE
General Description .......................................................................................................

ENGINE COOLING 6B-1
SECTION 6B
ENGINE COOLING
TABLE OF CONTENTS
PAGE
General Description ....................................................................................................... 6B- 2
Service Precaution ......................................................................................................... 6B- 3
Diagnosis ...................................................................................................................... .. 6B- 5
Draining and Refilling Cooling System ........................................................................ 6B- 6
Water Pump .................................................................................................................... 6B- 7
Water Pump and Associated Parts .......................................................................... 6B- 7
Removal ...................................................................................................................... 6 B- 7
Inspection ................................................................................................................... 6 B- 7
Installation .................................................................................................................. 6B- 8
Thermostat ..................................................................................................................... . 6B- 9
Removal ...................................................................................................................... 6 B- 9
Inspection ................................................................................................................... 6 B- 9
Installation .................................................................................................................. 6B- 9
Fan clutch with Cooling Fan.......................................................................................... 6B- 9 Inspection and Repair ............................................................................................... 6B- 9
Radiator ....................................................................................................................... .... 6B-11
Radiator and Associated Parts ................................................................................. 6B-11
Removal ...................................................................................................................... 6 B-11
Inspection ................................................................................................................... 6 B-12
Installation .................................................................................................................. 6B-13
Main Data and Specifications ........................................................................................ 6B-13
Special Service Tool....................................................................................................... 6B- 14

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TO MODEL INDEX
ISUZU KB P190 2007

Page 2106 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6B-2 ENGINE COOLING
General Description
Legend
1 W ater Pump
2 Thermostat
3 Radiator
4 Reserve Tank 5 Coolant Distributor
6 Cylinder Block and Head
7 Throttle Body
8 Heater

The Cooling S

Page 2107 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE COOLING 6B-3

Service Precaution
CAUTION:
Always use the correct fastener in the proper location.
When you replace a fastener, use ONLY the exact part
number for that application.

Page 2108 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6B-4 ENGINE COOLING

Antifreeze Solution
• Calculating mixing ratio
Mixing ratio

= Antifreeze solution (Lit/gal.)
Antifreeze solution (Lit/gal.) + W ater (Lit/gal.)

NOTE: Antifreez

Page 2109 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE COOLING 6B-5
Diagnosis
Engine Cooling Trouble
Condition Possible cause Correction
Engine overheating Low Engine Coolant level Replenish
Thermo mater unit faulty Replace
Faulty ther

Page 2110 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6B-6 ENGINE COOLING

Draining and Refilling Cooling
System
Before draining the cooling system, inspect the system and
perform any necessary service to ensure

6B-6 ENGINE COOLING

Draining and Refilling Cooling
System
Before draining the cooling system, inspect the system and
perform any necessary service to ensure that it is clean, does
not leak and is in proper working order. The engine coolant
level should be between the "MIN" and "MAX" lines of reserve
tank when the engine is cold. If low, check for leakage and add
engine coolant up to the "MAX" line. There should not be any
excessive deposit of rust or scales around the radiator cap or
radiator filler hole, and the engine coolant should also be free
from oil.
Replace the engine coolant if excessively dirty.
1. Completely drain the cooling system by opening the drain
plug at the bottom of the radiator.
2. Remove the radiator cap.
WARNING: TO AVOID THE DANGER OF BEING BURNED,
DO NOT REMOVE THE CAP WHILE THE ENGINE AND
RADIATOR ARE STILL HOT. SCALDING FLUID AND
STEAM CAN BE BLOWN OUT UNDER PRESSURE.
3. Disconnect all hoses from the engine coolant reserve tank.
Scrub and clean the inside of the reserve tank with soap and water. Flush it well with clean water, then drain it. Install
the reserve tank and hoses.
4. Refill the cooling system with the engine coolant using a solution that is at least 50 percent antifreeze.
5. Fill the radiator to the base of the filler neck.
Fill the engine coolant reserve tank to "MAX" line when the engine is cold.
6. Block the drive wheels and firmly apply the parking brake and place the shift lever in the "NEUTRAL" position.
7. Remove the radiator cap. Start the engine and warm it up at 2,500 - 3,000 rpm for about 30 minutes.
8. W hen the air comes out from the radiator filler neck and the engine coolant level has gone down, replenish with the
engine coolant. Repeat this procedure until the engine
coolant level does not go down. Then stop the engine and
install the radiator cap. Let the engine cool down.
9. After the engine has cooled, replenish with engine coolant up to the "MAX" line of the reserve tank.
10. Start the engine. W ith the engine running at 3,000 rpm, make sure there is no running water sound from the heate
r
core (behind the center console).
11. If the running water sound is heard, repeat steps 8 to 10.

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ISUZU KB P190 2007

Page 2111 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE COOLING 6B-7
Water Pump
Water Pump and Associated Parts

Legend
1 Water Pump Assembly 2 O-Ring
3 Bolt

2
3 1

Removal
1. Disconne

Page 2112 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6B-8 ENGINE COOLING

•
Crack in the water pump body
• EC leakage from the seal unit
• Play or abnormal noise in the bearing
• Cracks or corrosion in the

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