Isuzu Trooper (1998-2002 year). Manual - part 648

6G – 2 ENGINE LUBRICATION

GENERAL DESCRIPTION

LUBRICATION CHART

P

33

32

31

30

1

2

3

4

5

6

8

9

7

10

11

12

13

14

23

29

25

28

27

26

24

15

16

17

18

19

20

21

22

Legend

(1)

Camshaft

(2)

Balance Shaft

(3)

Crankshaft

(4)

Oil Cooler and Oil Filter Assembly

(5)

Oil Filter Relief Valve 98 Kpa (1 kg/cm

2

/14.2 Psi)

(6)

Oil Cooler Relief Valve 245 Kpa (2.5 kg/cm

2

/

36 Psi)

(7)

First Oil Pump

(8)

Main Oil Relief Valve 588 Kpa (6 kg/cm

2

/ 85 Psi)

(9)

To Oil Pan

(10)

To Oil Pan

(11)

Injector

(12)

Oil Rail

(13)

Sub Oil Filter Relief Valve 98 Kpa (1 kg/cm

2

/

14.2 Psi)

(14)

Sub Oil Filter

(15)

Relief Valve 588 Kpa (6 kg/cm

2

/ 85 Psi)

(16)

Second Oil Pump

(17)

Oil Pan

(18)

To Oil Pan

(19)

Balance Shaft

(20)

Cooling Jet Relief Valve 245 Kpa (2.5 kg/cm

2

/

36 Psi)

(21)

Cooling Jet

(22)

To Oil Pan

(23)

Two Way Check Valve

(24)

Nipple Filter

040RW018

ENGINE LUBRICATION  6G – 3

To meet a newly adopted electronically controlled fuel
injection system using engine oil two oil pumps have
been provided to increase circulating oil capacity.
The first oil pump serves mainly to lubricate the engine
parts, while the second mainly serves the fuel injectors
and partially cools the pistons.
The oil cooler is provided on the first oil pump side and
uses engine coolant.

OIL FLOW

Legend

(1) Oil Pump
(2) Regulator Valve
(3) Oil Cooler
(4) Oil Filter Relief Valve
(5) Full Flow Filter
(6) Oil Cooler Relief Valve
(7) Gallery

OIL PUMP SPECIFICATIONS

First

Second

Pump Revolution

8800 rpm

Delivery Pressure

392 Kpa (4.0 kg/cm

2

/57 psi)

Delivery Capacity

>48.8 

l/min

>37.1 

l/min

OIL FILTER SPECIFICATIONS

Filtration Method

Full flow Paper 

Filtration Area

0.32 m

2

Relief Valve opening 

981 Kpa (10 kg/cm

2

/142 psi)

pressure

Legend 

(1) Oil cooler assembly
(2) Oil filter assembly

(25)

Edge Filter

(26)

Edge Filter

(27)

High Pressure Oil Pump Assembly

(28)

To Oil Pan

(29)

Pressure Control Valve

(30)

To Oil Pan

(31)

Turbocharger

(32)

Oil Gallery

(33)

Timing Gear Train

1

7

6

5

4

3

2

050RW010

For Europe

1

2

050R200001

6G – 4 ENGINE LUBRICATION

SUB OIL FILTER SPECIFICATIONS

Filtration Method

Full flow Paper 

Filtration Area

0.12 m

2

Relief Valve opening 

981 Kpa (10 kg/cm

2

/142 psi)

pressure

The sub oil filter requires no servicing until the
replacement interval is reached.
The element is designed to provide special filtering
efficiency until it becomes due for replacement.
It is recommended to check and replace the sub filter
when the engine is being overhauled or if it is broken
inside the engine.

442RW004

ENGINE LUBRICATION  6G – 5

OIL PUMP

REMOVAL

1. Remove battery ground cable.
2 Raise the vehicle and support with suitable safety

stand.

3. Drain engine oil.
4. Remove flywheel assembly.
5. Remove rear plate (For A/T) or flywheel housing

(For MT).

6. Remove first oil pump assembly from cylinder block

and second oil pump assembly from crank case.

INSPECTION AND REPAIR

1. Inspect flaws and/or wear on the teeth surface.
2. Inspect abnormal wear journal on the gear and in

the drive spline.

3. If problem is found during inspection, the worn parts

must be replaced.

INSTALLATION

1. Install first oil pump.

1) Set O-ring to oil pump.

2) Install oil pump drive gear to the end of

balance shaft RH.

3) Apply engine oil to oil pump gear and install

gear to the end surface of cylinder block.

Torque: 20 N·m (2.0 kg·m / 14 lb ft)

2. Install second oil pump.

1) Set O-ring to oil pump.

2) Install oil pump drive gear to the end of

balance shaft LH.

3) Apply engine oil to oil pump gear and install

gear to the end surface of crankcase.

Torque: 20 N·m (2·0 kg.m / 14 lb ft)

2

1

5

6

3

4

Legend

(1)

Flywheel

(2)

Rear Plate

(3)

First Oil Pump

(4)

Second Oil Pump

(5)

O-ring (For 1st oil pump)

(6)

O-ring (For 2nd oil pump)

012RW097