Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1221

ENGINE COOLING (Y22SE 2.2L)

6B–8

110R100004

Legend for Automatic Transmission (A/T)

(1) Radiator
(2) Bracket

(3) Cooling Fan Assembly
(4) Radiator Cap
(5) Radiator Hose

Removal

1. Disconnect battery ground cable.
2. Disconnect cooling fan motor connector. (For M/T

one connector, for A/T two connectors)

3. Loosen a drain plug to drain EC. (Engine coolant)
4. Disconnect radiator inlet hose and outlet hose from

the engine.

5. Remove fan assembly, bolts on upper sides and the

bottom.

6. Disconnect the reservoir tank hose from radiator.
7. Remove bracket(2).

110RX003

6B–9

ENGINE COOLING (Y22SE 2.2L)

110R100005

8. Lift out the radiator assembly with hose.
9. Remove rubber cushions on both upper sides and 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) 1.96 

∼

 4.91

(0.28 

∼

 0.71)

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 sign 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 147 kPa
(21.3 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.

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

ENGINE COOLING (Y22SE 2.2L)

6B–10

110RX002

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.

3. Install bracket and support the radiator upper tank

with the bracket and secure the radiator.

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

engine.

110RX003

110R100005

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

up to MAX mark of reservoir tank.
Important operation (in case of 100% engine coolant
change) procedure for filling with engine coolant.

D

Remove radiator cap.

D

Fill with engine coolant (EC) to the radiator filler
neck.

D

Fill with EC to the “MAX” line on the reservoir.

D

Start the engine with the radiator cap removed and
bring to operating temperature by running engine at
2,500 

∼

 3,000 rpm for 30 minutes.

D

By EC temperature gauge reading make sure that
the thermostat is open.

D

If air bubbles come up to the radiator filler neck,
replenish with EC. Repeat until the EC level does
not drop any further. Install the radiator cap and
stop the engine.

D

Replenish EC to the “MAX” line on the reservoir and
leave as it is until the engine gets cool.

D

After the engine gets cool, start the engine and
make sure there is no water running noise heard
from the heater core while the engine runs at 3000
rpm.

D

Should water running noise be heard, repeat the
same procedure from the beginning.

6B–11

ENGINE COOLING (Y22SE 2.2L)

Main Data and Specifications

General Specifications

Transmission Type

Manual Transmission

Automatic Transmission

Cooling system

Engine Coolant forced circulation

Radiator

(1 tube in row) Tube type corrugated

Heat radiation capacity

62.8 kw (54000 Kcal/h)

73.8 kw (63500 Kcal/h)

Heat radiation area

7.6773m

@

 (11900 in

@

)

9.9817m

@

 (15472 in

@

)

Radiator front area

0.2639m

@

 (409 in

@

)

0.2639m

@

 (409 in

@

)

Radiator dry weight (with fan)

55.4 N (5.65 kg)

88.3 N (9.0 kg)

Radiator cap valve opening pressure

108 kpa (15.7 psi)

Engine coolant capacity

1.8 Lit (1.9 US quarts)

1.9 Lit (2.0 US quarts)

Engine coolant pump

Centrifugal type

Thermostat

Bypass type

Engine coolant total capacity

6.9 Lit (7.3 US quarts)

7.0 Lit (7.4 US quarts)