Isuzu engine 4j series. Manual - part 10

SERVICE INFORMATION  00 – 39

3. Remove the element from the solution and rinse it

well with running water.
Water pressure must not exceed 274 kPa (2.8 kg/cm

2

/40Psi)

4. Dry the element in a well ventilated area.

An electric fan will hasten drying.

NOTE:

Do not use compressed air or an open flame to dry
the element quickly. Damage to the element will
result.  It will usually take two or three days for the
element to dry completely. Therefore, it is a good idea
to have a spare on hand to use in the interim.

LUBRICATING SYSTEM

Main Oil Filter (Cartridge Type Paper Element)
Replacement Procedure

1. Loosen the used oil filter by turning it

counterclockwise with the filter wrench.

2. Clean the oil filter fitting face.

This will allow the new oil filter to seat properly.

3. Apply a light coat of engine oil to the O-ring.
4. Turn in the new oil filter until the filter O-ring is fitted

against the sealing face.

5. Use the filter wrench to turn in the filter an additional 1

and 1/4 turns.
Filter Wrench : 5-8840-0200-0 (89mm/3.5in)

5-8840 0202-0 (106mm/4.2in)
5-8840-2209-0 (100.6mm/4.0in)

6.  Check the engine oil level and replenish to the

specified level if required.

Replenishment Engine Oil

lit (Imp qt/US qt)

                                                                                                                   

0.7 (0.62/0.74)

                                                                                                                   

7. Start the engine and check for oil leakage from the

main oil filter.

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  SERVICE INFORMATION

FUEL SYSTEM

Fuel Filter

Replacement Procedure

1. Loosen the used fuel filter by turning it

counterclockwise with the filter wrench.
Filter Wrench: 5-8840-0253-0 (J-22700)

2. Clean the filter cover fitting faces.

This will allow the new fuel filter to seat properly.

3. Turn in the fuel filter until the sealing face comes in

contact.

4. Turn in the fuel filter an additional 2/3 of a turn with a

filter wrench.
Filter Wrench: 5-8840-0253-0 (J-22700)

5. Loosen the bleeder plug on the injection pump

overflow valve.

6. Operate the priming pump until fuel begins to flow

from the fuel filter.

7. Retighten the bleeder plug.
8. Operate the priming pump several times and check

for fuel leakage.

NOTE:

The use of an ISUZU genuine fuel filter is strongly
recommended.

Fuel Filter Water Draining Procedure

The indicator light will come on when the water level in
the water separator exceeds the specified level.
Drain the water and foreign material from the water
separator with the following procedure.

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SERVICE INFORMATION  00 – 41

1. Find a safe place to park the vehicle.
2. Open the engine hood and place a container

(Approximately 0.2 liter capacity) at the end of the
vinyl hose beneath the drain plug on the separator.

3. Loosen the drain plug by turning it counterclockwise

(Approximately 5 turns) and operate the priming pump
up and down about 10 times until water is drained
approximately 0.1 liter.

4. After draining, securely tighten the drain plug by

turning it clockwise and operate the priming pump
manually up and down several times.

5. After starting the engine, check to see that there is no

fuel leak from the drain plug. Also check to see that
the fuel filter water indicator light has turned off.
If water separator requires frequent draining, have the
fuel tank drained for removal of water at your Isuzu
Dealer.

Air Bleeding

1. Loosen the bleeder screw on the injection pump

overflow valve.

2. Operate the priming pump until fuel mixed with foam

flows from the bleeder screw.

3. Tighten the bleeder screw.
4. Operate the priming pump several times and check

for fuel leakage.

COOLING SYSTEM

Coolant Level

Check the coolant level and replenish the radiator reserve
tank as necessary.
If the coolant level falls below the “MIN” line, carefully
check the cooling system for leakage.  Then add enough
coolant to bring the level up to the “MAX” line.

Engine coolant change procedure

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.

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  SERVICE INFORMATION

NOTE:

For best result it is suggested that the engine
cooling system be flushed at least once a year.
it is advisable to flush 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 lsuzu
genuine anti-freeze (ethylene-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.
Othewise 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
dislodged 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