Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1374

6B–8

ENGINE COOLING (6VD1 3.2L)

Radiator

Radiator and Associated Parts

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Legend

(1) Oil Cooler Hose For Automatic Transmission
(2) Radiator Hose
(3) Fan Guide, Lower

(4) Reserve Tank Hose
(5) Radiator Assembly
(6) Reserve Tank

Removal

1. Disconnect battery ground cable.
2. Loosen a drain plug(2) to drain EC.
3. Disconnect oil cooler hose(1) on automatic

transmission (A/T).

4. Disconnect radiator inlet hose and outlet hose from

the engine.

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5. Remove fan guide(1), clips(3) on both sides and the

bottom lock, then remove fan guide lower(3) with fan
shroud(4).

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ENGINE COOLING (6VD1 3.2L)

6B–9

6. Disconnect the reserve tank hose(4) from radiator.

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7. Lift up and remove the radiator assembly with hose,

taking care not to damage the radiator core with a fan
blade.

8. Remove rubber cushions on both sides at the bottom.

Inspection

Radiator Cap

Measure the valve opening pressure of the pressurizing
valve with a radiator filler cap tester.
Replace the cap if the valve opening pressure is outside
the standard range.

Valve opening pressure kPa (psi) 93.3 

∼

 122.7

(13.5 

∼

17.8)

Cap tester: J–24460–01
Adapter: J–33984–A
Check the condition of the vacuum valve in the center of
the valve seat side of the cap. If considerable rust or dirt is
found, or if the valve seat cannot be moved by hand, clean
or replace the cap.

Valve opening vacuum kPa (psi) 0 

∼

 6.9 (0 

∼

 1.0)

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Radiator Core

1. A bent fin may result in reduced ventilation and

overheating may occur. All bent fins must be
straightened. Pay close attention to the base of the fin
when it is being straightened.

2. Remove all dust, bugs and other foreign material.

Flushing the Radiator

Thoroughly wash the inside of the radiator and the engine
coolant passages with cold water and mild detergent.
Remove all signs of scale and rust.

Cooling System Leakage Check

Use a radiator cap tester to force air into the radiator
through the filler neck at the specified pressure of 150 kPa
(22 psi) with a cap tester:

D

Leakage from the radiator

D

Leakage from the coolant pump

D

Leakage from the water hoses

D

Check the rubber hoses for swelling.

6B–10

ENGINE COOLING (6VD1 3.2L)

Cap tester: J–24460–01
Adapter: J–33984–A

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Installation

1. Install rubber cushions on both sides of radiator

bottom.

2. Install radiator assembly with hose, taking care not to

damage the radiator core with a fan blade.

3. Connect reserve tank hose (4).
4. Install lower fan guide (3).
5. Connect radiator inlet hose and outlet hose to the

engine.

6. Connect oil cooler hose (1) to automatic

transmission.

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7. Connect battery ground cable.
8. Pour engine coolant up to filler neck of radiator, and

up to MAX mark of reserve tank.

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Important operation (in case of 100% engine coolant
change) procedure for filling with engine coolant.

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 RADIATOR 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 radiator 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 replenishing with 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 idle for 5

minutes and stop the engine.

7. When 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 COOLING (6VD1 3.2L)

6B–11

Drive Belt and Cooling Fan

Drive Belt and Associated Parts

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Legend

(1) Crankshaft Pulley
(2) Generator
(3) Power Steering Pump

(4) Water Pump and Cooling Fan Pulley
(5) Idle Pulley
(6) Tension Pulley
(7) Drive Belt

The drive belt adjustment is not required as automatic
drive belt tensioner is equipped.

Removal

Move the tension pulley drive belt loosen side, remove the
drive belt.

Inspection

Check drive belt for wear or damage, and replace with a
new one as necessary.

Installation

Install cooling fan assembly and tighten bolts/nuts to the
specified torque.

Torque : 22 N·m (16 lb ft) for fan pulley and fan
bracket.

Torque : 7.5 N·m (66.4 lb in) for fan and clutch
assembly.

NOTE: Fan belts for 6VD1 Gasoline Engine mounted on
98MY Rodeo(UE) have been brought into one. As a
result, the rotating direction of a fan belt is opposite to the
direction of cooling fan for 93 to 97MY 6VD1 with no
interchangeability.
Therefore, incorrect installation of a fan may cause the air
to flow in the opposite direction, thus resulting in poor per-
formance of the air conditioner and an increase in engine
water temperature.