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.