Isuzu KB P190. Manual - part 526

6A-90 ENGINE MECHANICAL (C24SE) 

ITEM NO. 

ILLUSTRATION 

PART NO. 

PART NAME 

13 

 

 

 

5-8840-0446-0 

 

 

 

Flywheel Holder 

4 

 

 

5-8840-2598-0 

 

 

Holding Wrench 

4 

 

 

5-8840-2599-0 

 

 

Reamer Set 

17 

 

 

5-8840-2601-0 

 

 

Installer 

 

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 ......................................................................................................................  6B- 7 

Inspection...................................................................................................................  6B- 7 

Installation..................................................................................................................  6B- 8 

Thermostat ......................................................................................................................  6B-  9 

Removal ......................................................................................................................  6B- 9 

Inspection...................................................................................................................  6B- 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 ......................................................................................................................  6B-11 

Inspection...................................................................................................................  6B-12 

Installation..................................................................................................................  6B-13 

Main Data and Specifications........................................................................................  6B-13 

Special Service Tool.......................................................................................................  6B-14 

 

6B-2  ENGINE COOLING 

General Description 

Legend

1 Water Pump
2 Thermostat
3 Radiator
4 Reserve Tank

5 Coolant Distributor
6 Cylinder Block and Head
7 Throttle Body
8 Heater

 

 

 

 

 

The Cooling System is a pressurized type, where the water 
pump, which is cambelt driven, forces the circulation of 
the coolant through the cylinder block and head. The 
thermostat regulates the flow of coolant between the 
radiator and the bypass circuit. The heater is part of the 
bypass circuit. The throttle body pre-heat is a separate 
circuit which is not regulated by the thermostat. An oil 
cooler may be fitted as part of this circuit. 
 

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. ISUZU will call out those 
fasteners that require a replacement after removal. ISUZU 
will also call out the fasteners that require thread lockers 
or thread sealant. UNLESS OTHERWISE SPECIFIED, do 
not use supplemental coatings (Paints, greases, or other 
corrosion inhibitors) on threaded fasteners or fastener 
joint interfaces. Generally, such coatings adversely affect 
the fastener torque and the joint clamping force, and may 
damage the fastener. When you install fasteners, use the 
correct tightening sequence and specifications. Following 
these instructions can help you avoid damage to parts 
and systems. 
 

 

 

 

 

Water pump 

The water pump is centrifugal type and is driven by timing belt.
 

 

 

Thermostat 

The thermostat is a bypass type and is a wax pellet type with a 
air hole. 
 

 

  

 

110RS001 

 

Radiator 

The radiator is a flow type with corrugated fins.