Isuzu Trooper (1998-2002 year). Manual — part 391
6A–94
ENGINE MECHANICAL (6VE1 3.5L)
ILLUSTRATION
TOOL NO.
TOOL NAME
5–8840–2443–0
(J–42686)
Lever; Gear spring
5–8840–2447–0
(J–43041)
Holder; Universal
5–8840–0551–0
(J–24086–C)
Service set; Piston pin
ENGINE COOLING
6B–1
ENGINE
ENGINE COOLING
CONTENTS
Service Precaution
6B–1
. . . . . . . . . . . . . . . . . . . . . .
General Description
6B–2
. . . . . . . . . . . . . . . . . . . . .
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–7
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat
6B–8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat and Associated Parts
6B–8
. . . . . . . .
Removal
6B–8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection
6B–8
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation
6B–8
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radiator
6B–9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radiator and Associated Parts
6B–9
. . . . . . . . . .
Removal
6B–9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection
6B–10
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation
6B–11
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drive Belt and Cooling Fan
6B–12
. . . . . . . . . . . . . . .
Drive Belt and Associated Parts
6B–12
. . . . . . . . .
Inspection
6B–12
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation
6B–12
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data and Specifications
6B–13
. . . . . . . . . . . . .
Special Tool
6B–14
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING, REFER TO
THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN POSSIBLE
AIR BAG DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.
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.
6B–2
ENGINE COOLING
General Description
030RW001
Legend
(1) Water Pump
(2) Thermostat
(3) Radiator
(4) Reserve Tank
(5) Cooling Fan
(6) Cylinder Block
(7) Cylinder Head
(8) Right Bank
(9) Throttle Body
(10) Cylinder Block
(11) Cylinder Head
(12) Left Bank
(13) Heater
The cooling system is a pressurized Engine Coolant (EC)
forced circulation type which consists of a water pump,
thermostat cooling fan, radiator and other components.
The automatic transmission fluid is cooled by the EC in
radiator.
Water Pump
The EC pump is a centrifugal impeller type and is driven
by a timing belt.
030RS001
ENGINE COOLING
6B–3
Thermostat
The thermostat is a wax pellet type with a air hole(1) and is
installed in the thermostat housing.
031RW002
Radiator
The radiator is a tube type with corrugated fins. In order to
raise the boiling point of the coolant, the radiator is fitted
with a cap in which the valve is operated at 93.3
∼
122.7
kPa (0.95
∼
1.25 kg/cm
2
, 13.5
∼
17.8 psi) pressure. (No oil
cooler provided for M/T)
110RS001
Anti Freeze Solution
D
Relation between the mixing ratio and freezing
temperature of the EC varies with the ratio of
anti–freeze solution in water. Proper mixing ratio can
be determined by referring to the chart. Supplemental
inhibitors or additives claiming to increase cooling
capability that have not been specifically approved by
Isuzu are not recommended for addition to the cooling
system.
D
Calculating mixing ratio
F06RW005
NOTE: Antifreeze solution + Water = Total cooling
system capacity.
D
Total Cooling System Capacity
D
M/T 8.8Lit (2.32Us gal)
D
A/T 8.4Lit (2.22Us gal)
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