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Opel Frontera UE. Manual - part 889

6B–4

ENGINE COOLING (6VD1 3.2L)

B06RW002

Mixing ratio

Check the specific gravity of engine coolant in the
cooling system temperature ranges from 0

C to 50

using a suction type hydrometer, then determine the
density of the engine coolant by referring to the table.

NOTE:

1. Even in the areas where the atmospheric

temperature is higher than 0

C, be sure not to use

antifreeze solution at a mixing ratio lower than 20% so
that the inside of the engine may not be corroded.

2. If antifreeze solution is used at a mixing ratio higher

than 60%, the specific heat of the coolant falls and the
engine may be overheated. Moreover, antifreeze
performance drop and the coolant may be frozen.
The density of the solution must be adjusted as
occasion calls.

Antifreeze solution lower than 20% may not have
sufficient anticorrosive performance, and therefore,
please never fail to adjust as occasion demands within
the range of 20% to 60%.

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ENGINE COOLING (6VD1 3.2L)

6B–5

Diagnosis

Engine Cooling Trouble

Condition

Possible cause

Correction

Engine overheating

Low Engine Coolant level

Replenish

Incorrect fan installed

Replace

Thermo meter unit faulty

Replace

Faulty thermostat

Replace

Faulty Engine Coolant temperature
sensor

Repair or replace

Clogged radiator

Clean or replace

Faulty radiator cap

Replace

Low engine oil level or use of
improper engine oil

Replenish or change oil

Clogged exhaust system

Clean exhaust system or replace
faulty parts

Faulty Throttle Position sensor

Replace throttle valve assembly

Open or shorted Throttle Position
sensor circuit

Repair or replace

Damaged cylinder head gasket

Replace

Engine overcooling

Faulty thermostat

Replace

Engine slow to warm–up

Faulty thermostat

Replace

Thermo unit faulty

Replace

6B–6

ENGINE COOLING (6VD1 3.2L)

Draining and Refilling Cooling
System

Before draining the cooling system, inspect the system
and perform any necessary service to ensure that it is
clean, does not leak and is in proper working order. The
engine coolant (EC) level should be between the “MIN”
and “MAX” lines of reserve tank when the engine is cold.
If low, check for leakage and add EC up to the “MAX” line.
There should not be any excessive deposit of rust or
scales around the radiator cap or radiator filler hole, and
the EC should also be free from oil.
Replace the EC if excessively dirty.

Engine coolant change

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 (eth-
ylene-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 precautions
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.

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.

10. 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.

11. Fill the coolant into the reservoir tank up to “MAX” line.

ENGINE COOLING (6VD1 3.2L)

6B–7

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:

Crack in the water pump body

EC leakage from the seal unit

Play or abnormal noise in the bearing

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 (2.5 kg·m/18 lb ft)

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.

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