Isuzu 4LE2 Workshop Manual

24
GENERAL INFORMATION
Fuel Filter Replacement
6. FUEL SYSTEM
Cartridge (Spin-On) Type
Removal
1. Loosen the fuel filter by turning it counterclockwise
with the filter wrench or your hand. Discard the
used filter.
Filter Wrench
2. Wipe the fuel filter fitting face clean with a rag.
This will allow the new fuel filter to seat properly.
Installation
1. Apply a light coat of engine oil to the O-ring.
2. Supply fuel to the new filter.
This will facilitate air bleeding.
3. Turn in the new fuel filter until the filter O-ring is fit-
ted against the sealing face.
4. Use the filter wrench to turn in the fuel filter an addi-
tional 2/3 of a turn.
Injection nozzle
Check to see if the spray condition and the injection
pressure are normal. Adjust them to the specified value
respectively when they don’t meet the standard valve.
Spray Condition
(1) Correct
(2) Incorrect (Restrictions in orifice)
(3) Incorrect (Dipping)
MPa (kgf/cm
2
/psi)
123
Injection pressure 17.7 (180/2560)
Using a nozzle tester, adjust the injection pressure with a
shim.
Special tool: Nozzle tester
Fig. 31
Fig. 32
Fig. 33

Isuzu 4LE2 Specifications

General

Engine Model	4LE2
Fuel System	Direct Injection
Fuel Type	Diesel
Engine Type	4-cylinder, 4-cycle, water-cooled diesel
Aspiration	Naturally aspirated