Isuzu Rodeo UE. Manual - part 297

6B–6

ENGINE COOLING (6VD1 3.2L)

Water Pump

Water Pump and Associated Parts

030RS002

Legend

(1) Timing Belt
(2) Idle Pulley

(3) Water Pump Assembly
(4) Gasket

Removal

1. Disconnect battery ground cable.
2. Drain coolant.
3. Radiator hose (on inlet pipe side).
4. Remove timing belt. Refer to “Timing Belt” in this

manual.

5. Remove Idle pulley.
6. Remove water pump assembly.
7. Remove gasket.

Inspection

Make necessary repair and parts replacement if extreme
wear or damage is found during inspection. Should any of
the following problems occur, the entire water pump
assembly must be replaced.

f

Crack in the water pump body

f

EC leakage from the seal unit

f

Play or abnormal noise in the bearing

f

Cracks or corrosion in the impeller

Installation

1. Install gasket, clean the mating surface of gasket

before installation.

2. Install water pump assembly and tighten bolts to the

specified torque.

Torque: 25 N·m (18 lb ft)

f

Tightening order
The tightening order are in the illustrate.

NOTE: To prevent the oil leakage, apply the LOCTITE
262 or an equivalent, to the arrow marked fixing bolt
thread.

030RW008

3. Idle pulley

f

Install idle pulley and tighten bolt to the specified
torque.

Torque: 52 N·m (38 lb ft)

4. Timing belt

f

Install timing belt. Refer to timing belt installation
step in “Timing Belt” in this manual.

5. Connect radiator inlet hose and replenish EC.
6. Connect battery ground cable.

ENGINE COOLING (6VD1 3.2L)

6B–7

Thermostat

Thermostat and Associated Parts

031RW001

Legend

(1) Thermostat Housing
(2) Thermostat
(3) Outlet Pipe

Removal

1. Disconnect battery ground cable.
2. Drain engine coolant from the radiator and engine.
3. Disconnect radiator hose from the inlet pipe.
4. Remove thermostat housing.
5. Remove thermostat(2).

Inspection

Suspend the thermostat in a water–filled container using
thin wire. Place a thermometer next to the thermostat.
Do not directly heat the thermostat.
Gradually increase the water temperature. Stir the water
so that the entire water is same temperature.

031RS003

Confirm the temperature when the valve first begins to
open.

Valve opening temperature 74.5C 

∼

 78.5

°

C

(166.1

°

F 

∼

 173.3

°

F)

Confirm the temperature when the valve is fully opened.

Valve full open temperature and lift More than
8.5mm (0.33 in) at 90

°

C (194

°

F)

Make necessary repair and parts replacement if extreme
wear or damage is found during inspection.

Installation

1. Install thermostat into the outlet pipe(4) making sure

that the air hole is in the up position.

2. Install thermostat housing and tighten bolts to the

specified torque.

Torque: 25 N·m (18 lb ft)

3. Installation rubber hose.
4. Replenish engine coolant (EC).
5. Start engine and check for EC leakage.

6B–8

ENGINE COOLING (6VD1 3.2L)

Radiator

Radiator and Associated Parts

110RW010

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.

110RW002

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

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

110RW001

ENGINE COOLING (6VD1 3.2L)

6B–9

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

110RX001

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)

110RS006

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 196 kPa
(28.5 psi) with a cap tester:

f

Leakage from the radiator

f

Leakage from the coolant pump

f

Leakage from the water hoses

f

Check the rubber hoses for swelling.