Opel Frontera UE. Manual - part 769

ENGINE COOLING (X22SE 2.2L)

6B–7

Radiator

Radiator and Associated Parts

110RX004

Legend

EndOFCallout

Removal

1. Disconnect battery ground cable.

2. Disconnect cooling fan motor connector.

3. Loosen a drain plug to drain engine coolant.

4. Disconnect radiator inlet hose and outlet hose from 

the engine.

5. Remove fan guide, clips on both sides and the 

bottom lower with fan shroud.

6. Disconnect the reserve tank hose from radiator.

7. Remove bracket(2).

110RX003

(1) Radiator
(2) Bracket
(3) Cooling Fan Assembly

(4) Radiator Cap
(5) Radiator Hose
(6) Lower Fan Guide

6B–8

ENGINE COOLING (X22SE 2.2L)

8. Lift out the radiator assembly with hose, taking care 

not to damage the radiator core with fan blade.

9. 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: 5–8840–0277–0
Adapter: 5–8840–2603–0
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 196 
kPa (28.5 psi) with a cap tester:

• Leakage from the radiator

• Leakage from the coolant pump

• Leakage from the water hoses

• Check the rubber hoses for swelling.
Cap tester: 5–8840–0277–0
Adapter: 5–8840–2603–0

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 with a fan blade.

3. Install bracket and support the radiator upper tank 

with the bracket and secure the radiator.

4. Connect reserve tank hose.

5. Install lower fan guide (6).

ENGINE COOLING (X22SE 2.2L)

6B–9

6. Connect radiator inlet hose and outlet hose to the 

engine.

110RX003

7. Connect battery ground cable.

8. Pour engine coolant up to filler neck of radiator, and 

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

1. To change engine coolant, 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 and drain the cooling system 

by loosening the drain valve on the  radiator and 
on the cylinder body.

NOTE:  For best result it is suggested that the engine 
cooling system be flushed at least once a  year. It is 
advisable to flash the interior of the cooling system 
including the radiator  before using anti-freeze 
(ethylene-glycol based).
Replace damaged rubber hoses as the engine 
anti-freeze coolant is liable to leak  out even minor 
cracks.
Isuzu recommends to use Isuzu genuine anti-freeze 
(ethylen-glycol based)  or equivalent, for the cooling 
system and not add any inhibitors or additives.

CAUTION:  A failure to correctly fill the engine 
cooling system in changing or topping up coolant  
may sometimes cause the coolant to overflow from 
the filler neck even before the engine  and radiator 
are completely full.
If the engine runs under this condition, shortage of 
coolant may possibly result in  engine overheating. 

To avoid such trouble, the following precausions 
should be taken in  filling the system.

3. To refill engine coolant, pour coolant up to filler 

neck using a filling hose which is  smaller in 
outside diameter of the filler neck. Otherwise air 
between the filler neck and  the filling hose will 
block entry, preventing the system from 
completely filling up.

4. Keep a filling rate of 9 liter/min or less. Filling 

over this maximum rate may force air  inside the 
engine and radiator.
And also, the coolant overflow will increase, 
making it difficult to determine whether or  not 
the system is completely full.

5. After filling the system to the full, pull out the 

filling hose and check to see if air  trapped in the 
system is disclodged and the coolant level goes 
down. Should the coolant  level go down, repeat 
topping-up until there is no more drop in the 
coolant level.

6. After directly filling the radiator, fill the reservoir 

to the maximum level.

7. Install and 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.

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.

8. After tightening radiator cap, warm up the 

engine at about 2,000 rpm.
Set heater adjustment to the highest 
temperature position, and let the coolant 
circulate  also into heater water system.

9. Check to see the thermostat has opened 

through the needle position of water  
thermometer, conduct a 5-minute idling again 
and stop the engine.

6B–10

ENGINE COOLING (X22SE 2.2L)

Main Data and Specifications

General Specifications

Special Tool

Cooling system

Engine Coolant forced circulation

Radiator

(1 tube in row) Tube type corrugated

Heat radiation capacity

54,000 kcal/h (62.8 kw)

Heat radiation area

7.677m

2

 (0.878ft

2

)

Radiator front area

0.264m

2

 (0.028ft

2

)

Radiator dry weight (with fan)

32N (7.2lb)

Radiator cap valve opening pressure

93.3 

∼

 122.7kpa (13.5 

∼

 17.8psi)

Engine coolant capacity

1.8lit (0.48 US gal)

Engine coolant pump

Centrifugal type

Thermostat

Bypass type

Engine coolant total capacity

7.2lit (1.9 US gal)

ILLUSTRATION

TOOL NO.

TOOL NAME

5–8840–0277–0

Tester; radiator cap

5–8840–2603–0

Adapter; radiator cap