1998 ISUZU TROOPER Service Repair Manual

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Page 1849 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6C – 4 ENGINE FUEL
HIGH PRESSURE OIL PUMP, OIL FLOW
�1
33
32
31
30
1
2
3
4
56
8
97
10
11
12
13
14 23 29
25
28
27262415
16
17 18
19 20 21 22
Legend
(1) Camshaft
(2) Balance Shaft
(3) Crankshaft
(4) O

Page 1850 of 3573

ISUZU TROOPER 1998 Service Repair Manual ENGINE FUEL 6C – 5
FUEL FILTER
Legend
(1) Priming Pump
(2) Fuel Filter Cartridge
A cartridge type fuel filter is used along with the piston
type fuel pump on the high pressure oil pump.
The fuel fil

Page 1851 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6C – 6 ENGINE FUEL
2) With the current carried to the solenoid, a
poppet valve is opened by means of an
armature to let high-pressure engine oil into the
injector.
3) Under the oil pressure, the pis

Page 1852 of 3573

ISUZU TROOPER 1998 Service Repair Manual ENGINE FUEL 6C – 7
ON-VEHICLE SERVICE
FUEL FILTER ASSEMBLY
REMOVAL
1. Disconnect battery ground cable.
2. Fuel Filler cap
3. Fuel Hose
1) Disconnect fuel hose from filter body.
Plug the hose ends to

Page 1853 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6C – 8 ENGINE FUEL
REASSEMBLY
1. Clean the cartridge mounting surface of the filter
body so that the cartridge can be secured.
Apply engine oil thinly to new cartridge O-ring.
2. To facilitate bleed

Page 1854 of 3573

ISUZU TROOPER 1998 Service Repair Manual ENGINE FUEL 6C – 9
INJECTOR
2 1
6With
spacer type
Without
spacer type
8 9
3
4
7
5
Legend
(1) Nut and Washer
(2) Injector Clamp
(3) Nut
(4) Bolt
(5) Oil Rail Assembly
(6) Spacer (If equipped) and Bol

Page 1855 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6C – 10 ENGINE FUEL
REMOVAL
Prior to removal, be sure to confirm and record the
group code of the injector installed using Tech2.
1. Disconnect battery ground cable.
2. Remove air cleaner cover and

6C – 10 ENGINE FUEL
REMOVAL
Prior to removal, be sure to confirm and record the
group code of the injector installed using Tech2.
1. Disconnect battery ground cable.
2. Remove air cleaner cover and air duct.
3. Remove intercooler.
Refer to “Intercooler” in this manual.
4. Remove PCV hose and pipe.
5. Remove cylinder head noise insulator cover.
6. Remove high pressure oil pipe.
CAUTION:
1) Sleeve nut should be loosened with cloth tied
around to prevent oil from spurting due to the
remaining pressure.
2) High oil pressure pipe should be disconnected
with cloth tied around the intake manifold glow
plug to prevent oil from flowing out of the oil
rail.
7. Loosen eye bolt of fuel pipe at fuel pump side.
NOTE: Cloth should be put around the loosened eye
bolt to prevent fuel from flowing out.
8. Remove fuel return hose at chassis side.
9. Remove PCV hose to cylinder head cover.
10. Remove cylinder head cover.
11. Drain the oil from oil rail assembly.
NOTE: Do not drop O-ring
12. Record the grade code of injector for each cylinder
that is indicated on the upper portion of injector.
There are nine kinds of grade code available, one
alphabet letter and one numeral letter.
Grade codeLegend
(1) Part Number
(2) Category Number (Grade code)
(3) Serial Number
(4) Bar Code
13. Remove harness connector from each injector.
14. Loosen nuts and bolts for oil rail.
15. Remove injector fixing bolts.
16. Remove injector clamp.
17. Remove injector assembly.
INSTALLATION
1. Install oil rail, tighten temporarily
2. Install injector assembly.
NOTE:
1) Do not forget to install O-ring between injector and
oil rail.
2) Use new O-ring
3) Clean O-ring groove and fitting surface of parts.
4) Apply engine oil to O-ring.
3. Install injector fixing bolts, tighten temporarily.
4. Install injector clamp, tighten nut temporarily.
5. Tighten injector fixing bolts to the specified torque.
Torque: 6.5 N·m (0.7 kg·m / 5.1 lb ft)
6. Tighten injector clamp nut to the specified torque
with special method.
Torque: 30 N·m (3.1 kg·m / 22.4 lb ft) then loosen a
time again tighten as following torque.
Torque: 25 N·m (2.4 kg·m / 17.4 lb ft)
7. Tighten oil rail to the specified torque.
Torque: 20 N·m (2.0 kg·m / 14.5 lb ft)
1
4
32
055RW00001
Category number
A– 1
A– 2
A– 3
B – 1
B – 2
B – 3
C – 1
C – 2
C – 3

Page 1856 of 3573

ISUZU TROOPER 1998 Service Repair Manual ENGINE FUEL 6C – 11
8. Install injector harness assembly, reconnect
harness connecter to injector.
9. Record the identification marking of injector for
each cylinder that is indicated on the upper p

ENGINE FUEL 6C – 11
8. Install injector harness assembly, reconnect
harness connecter to injector.
9. Record the identification marking of injector for
each cylinder that is indicated on the upper portion
of injector.
Legend
(1) Part Number
(2) Category Number (Grade code)
(3) Serial Number
(4) Bar Code
10. Install cylinder head assembly.
Refer to “Cylinder Head” in this manual.
11. Fill with about 300cc of engine oil from the high
pressure oil pipe installation port of the oil rail using
an oil filler.
If assembled without filling the oil rail with oil, the
time for engine starting will be longer.
12. Immediately install high pressure oil pipe and
tighten to specified torque.
Torque: 80 N·m (8.1 kg·m / 57.9 lb ft)
13. Install cylinder head noise insulator cover.
Refer to “Cylinder Head” in this manual.
14. Install intercooler assembly.
Refer to “Intercooler” in this manual.
15. Install air cleaner cover and air duct.
16. Use TECH2 to rewrite injector data to ECM.
For rewriting method refer to section “Data
Programming in Case of ECM Change” of section
6E 4JX1 engine driveability and emissions in this
manual.NOTE:
1) On completion of servicing, bleed air from the
engine inside fuel passage by means of the priming
pump. (The priming pump should be operated more
times than in the case of conventional engines.)
2) As air is in the oil rail, it takes more time to start the
engine. Rough idling may occur while the air is
being bled completely after engine start, but it does
not indicate trouble.
The air will be bled and normal engine status will be
reached while the vehicle is driven for about 5 km
or engine is operated for about 5 minutes at 1500 to
2000 rpm.
3) The injector spare part will be provided for group
number B1, B2 and B3 only.
Injector Grade code Programming
(Injector Change)
In case of an injector change, the injector grade code
(category number) must be programmed by Tech-2.
Programming Procedure
1. Connect the Tech-2 to the vehicle DLC.
2. Turn the starter switch to the “ON” position.
3. Select the “Diagnosis” from the Main menu.
4. Select the “Programming” from the Application
menu.
1
4
32
055RW00001
F0 : %JBHOPTUJD$PEF
F1 : %BUB%JTQMBZ
F2 : 4OBQTIPU
F3 : .JTDFMMBOFPVT5FTU
F4 : 1SPHSBNNJOH"QQMJDBUJPO.FOV
035RW00002

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