Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 101

LU(STI)-6

General Description

LUBRICATION

(1)

Plug

(19) Rocker cover

(37) Clip (model with oil cooler)

(2)

Gasket

(20) Baffle plate

(38) Oil filter connector (model without

oil cooler)

(3)

Relief valve spring

(21) O-ring

(39) Plug (model without oil cooler)

(4)

Relief valve

(22) Oil strainer

(40) Oil cooler hose B (model with oil

cooler)

(5)

Front oil seal

(23) Gasket

(41) Oil cooler hose C (model with oil

cooler)

(6)

Oil pump case

(24) Oil level gauge guide

(7)

Inner rotor

(25) Oil pan

Tightening torque: N·m (kgf-m, ft-lb)

(8)

Outer rotor

(26) Oil level gauge

T1: 5 (0.5, 3.7)

(9)

Oil pump cover

(27) Drain plug gasket

T2: 5.4 (0.6, 4.0)

(10) Oil filter

(28) Drain plug

T3: 6.4 (0.7, 4.7)

(11) Oil cooler connector (model with

oil cooler)

(29) Gasket (model with oil cooler)

T4: 10 (1.0, 7.0)

(12) Oil cooler pipe (model with oil

cooler)

(30) Oil filler cap

T5: 25 (2.5, 18.4)

(13) Oil cooler (model with oil cooler)

(31) Seal

T6: 44 (4.5, 32.5)

(14) O-ring

(32) O-ring

T7: 45 (4.6, 33.2)

(15) Oil pump ASSY

(33) Gasket

T8: 46.5 (4.7, 34.3)

(16) Oil pressure switch

(34) O-ring

T9: 54 (5.5, 39.8)

(17) Oil filler duct

(35) Nipple (model with oil cooler)

T10: 69 (7.0, 50.9)

(18) O-ring

(36) Oil cooler hose A (model with oil

cooler)

T11: 70 (7.1, 51.6)

LU(STI)-7

General Description

LUBRICATION

2. OIL PIPE

(1)

Oil inlet pipe

(8)

Cylinder head RH

Tightening torque: N·m (kgf-m, ft-lb)

(2)

Turbocharger oil pipe

(9)

Cylinder head LH

T1: 6.4 (0.7, 4.7)

(3)

Oil pipe RH

(10) Front camshaft cap RH

T2: 16 (1.6, 11.8)

(4)

Union bolt with filter (with protru-
sion)

(11) Front camshaft cap LH

T3: 20 (2.0, 14.8)

(5)

Union bolt without filter (without
protrusion)

(12) Turbocharger

T4: 29 (3.0, 21.4)

(6)

Gasket

(13) Union bolt without filter (with pro-

trusion)

(7)

Oil pipe LH

LU-02727

(3)

(4)

(5)

(10)

T1

T4

T4

(4)

(5)

(11)

T4

T4

(2)

(5)

T1

T4

(1)

(13)

(12)

T2

T3

(6)

(6)

(6)

(6)

(6)

(6)

(6)

(7)

(8)

(9)

LU(STI)-8

General Description

LUBRICATION

C: CAUTION

• Prior to starting work, pay special attention to the following:

1. Always wear work clothes, a work cap, and protective shoes. Additionally, wear a helmet, protective

goggles, etc. if necessary.
2. Protect the vehicle using a seat cover, fender cover, etc.
3. Prepare the service tools, clean cloth, containers to catch grease and oil, etc.

• Prepare a container and cloth when performing work which oil possibly spills. If oil spills, wipe it off imme-

diately to prevent from penetrating into floor or flowing out for environmental protection.

• Vehicle components are extremely hot immediately after driving. Be wary of receiving burns from heated parts.

• When performing a repair, identify the cause of trouble and avoid unnecessary removal, disassembly and

replacement.

• Before disconnecting connectors of sensors or units, be sure to disconnect the ground cable from battery.

• Always use the jack-up point when the shop jacks or rigid racks are used to support the vehicle.

• Remove contamination including dirt and corrosion before removal, installation, disassembly or assembly.

• Keep the removed parts in order and protect them from dust and dirt.

• All removed parts, if to be reused, should be reinstalled in the original positions with attention to the correct

directions, etc.

• Bolts, nuts and washers should be replaced with new parts as required.

• Be sure to tighten the fasteners including bolts and nuts to the specified torque.

• If the engine oil is spilt over exhaust pipe or the under cover, wipe it off with cloth to avoid emitting smoke

or causing a fire.

• Follow all government and local regulations concerning disposal of refuse when disposing of oil.

D: PREPARATION TOOL

1. SPECIAL TOOL

2. GENERAL TOOL

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

18332AA000

OIL FILTER
WRENCH

Used for removing and installing oil filter (black).
(Outer diameter: 68 mm (2.68 in))

499587100

OIL SEAL
INSTALLER

Used for installing oil seal into oil pump.

TOOL NAME

REMARKS

Oil filter wrench (65/67 mm 14 Flutes)

Used for removing and installing oil filter (blue).
(Outer diameter: 67.4 mm (2.65 in))

Circuit tester

Used for measuring resistance and voltage.

ST18332AA000

ST-499587100

LU(STI)-9

Oil Pressure System

LUBRICATION

2. Oil Pressure System

A: WIRING DIAGRAM

Oil pressure warning system <Ref. to WI-150, WIRING DIAGRAM, Oil Pressure Warning Light System.>

7

3

1 2 3 4 5 6 7 8 9 10 11

12 13 14 15 16 17 18 19 20 21 22
23 24 25 26 27 28 29 30 31 32 33

34 35
42 43

36 37 38 39

48 49 50 51 52 53 54

40 41

44 45

46 47

i1

5 6 7 8

2

1

9

4

3

10

24

22

23

25

27

26

28

11 12 13

14 15 16

17 18 19 20 21

i10

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

E11

2

19

1

E2

B21

B36

i1

i10

2

B21

LU-03150

FB-36

F/B FUSE NO. 5

(IG)

TO POWER SUPPLY CIRCUIT

COMBINATION

METER

OIL PRESSURE W

ARNING

LIGHT

OIL

PRESSURE

SWITCH