Subaru Legacy (2005 year). Manual — part 89

LUBRICATION

LU(H4SO 2.0)

Page

1.

General Description . . . . . . . . . . . . . . . . . . . . . 2

2.

Oil Pressure System . . . . . . . . . . . . . . . . . . . . ...7

3.

Engine Oil. . . . . . . . . . . . . . . . . . . . . . . . . 9

4.

Oil Pump . . . . . . . . . . . . . . . . . . . . . . . . ...11

5.

Oil Pan and Strainer. . . . . . . . . . . . . . . . . . . . ..15

6.

Oil Pressure Switch. . . . . . . . . . . . . . . . . . . . ...18

7.

Engine Oil Filter. . . . . . . . . . . . . . . . . . . . . . .19

8.

Engine Lubrication System Trouble in General. . . . . . . . . . .20

LU(H4SO 2.0)-2

LUBRICATION

General Description

1. General Description

A: SPECIFICATION

Lubrication method

Forced lubrication

Oil Pump

Pump type

Trochoid type

Number of teeth

Inner rotor

9

Outer rotor

10

Outer rotor diameter

× thickness

mm (in)

78

× 7 (3.07 × 0.28)

Tip clearance between inner and
outer rotors

Specifica-
tion

mm (in)

0.04 — 0.14 (0.0016 — 0.0055)

Side clearance between inner rotor
and pump case

Specifica-
tion

mm (in)

0.02 — 0.07 (0.0008 — 0.0028)

Case clearance between outer rotor
and pump case

Specifica-
tion

mm (in)

0.10 — 0.175 (0.0039 — 0.0069)

Performance at
80

°C (176°F)

600 rpm

Discharge
pressure

kPa (kgf/cm

2

, psi)

98 (1.0, 14)

Discharge
rate

2 US qt, Imp qt)/

min.

3.2 (3.4, 2.8)

5,000 rpm

Discharge
pressure

kPa (kgf/cm

2

, psi)

294 (3.0, 43)

Discharge
rate

2 US qt, Imp qt)/

min.

32.6 (34.4, 28.7)

Relief valve working pressure

kPa (kgf/cm

2

, psi)

490 (5.0, 71)

Oil filter

Filter type

Full-flow filter type

Filtration area

cm

2

(sq in)

Outer diameter 68 mm

800 (124)

Outer diameter 65 mm

470 (73)

By-pass valve opening pressure

kPa (kgf/cm

2

, psi)

160 (1.63, 23.2)

Outer diameter

× width

mm (in)

Outer diameter 68 mm

68

× 65 (2.68 × 2.56)

Outer diameter 65 mm

65

× 74.4 (2.56 × 2.93)

Installation screw specifications

M20

× 1.5

Oil pressure
switch

Type

Immersed contact point type

Working voltage — wattage

12 V — 3.4 W or less

Warning light activation pressure

kPa (kgf/cm

2

, psi)

14.7 (0.15, 2.1)

Proof pressure

kPa (kgf/cm

2

, psi)

981 (10, 142) or more

Engine oil

Capacity (at overhaul)

2 (US qt, Imp qt)

4.5 (4.8, 4.0)

When replacing engine oil and oil filter

2 (US qt, Imp qt)

4.2 (4.4, 3.7)

When replacing engine oil only

2 (US qt, Imp qt)

4.0 (4.2, 3.5)

LU(H4SO 2.0)-3

LUBRICATION

General Description

Recommended oil

For the API standard SL and SJ, use the logo
mark with “Energy Conserving” (If the SL, SJ
grade is not available, use SH grade).
ACEA standard A1, A2 or A3
ILSAC standard GF-3 “Star burst mark” is on
the container.

CAUTION:
When replenishing oil, it does not matter if the
oil to be added is a different brand from that in
the engine; however, use oil having the API
standard and SAE viscosity No. designated by
SUBARU.

NOTE:
If the vehicle is used in areas with very high temper-
atures or for other heavy duty applications, the fol-
lowing viscosity oils must be used. API standard:
SL or SJ
SAE Viscosity No.: 30, 40, 10W-50, 20W-40, 20W-
50

(1) SAE viscosity No. and applicable temperature

(2) Recommended

LU-02148

40

30

15

0

-15

-20

-30

( C)

104

86

59

32

5

-4

-22

( F)

SAE (1)

10W-30,10W-40

5W-30

0W-20 (2)

LU(H4SO 2.0)-4

LUBRICATION

General Description

B: COMPONENT

(1)

Plug

(13)

Oil pressure switch

(25)

Metal gasket

(2)

Gasket

(14)

Oil filler duct

(26)

Gasket

(3)

Relief valve spring

(15)

O-ring

(27)

Seal

(4)

Relief valve

(16)

Oil filler cap

(5)

Oil seal

(17)

O-ring

Tightening torque: N

⋅

m (kgf-m, ft-lb)

(6)

Oil pump case

(18)

Baffle plate

T1: 5 (0.5, 3.7)

(7)

Inner rotor

(19)

O-ring

T2: 5.4 (0.55, 4.0)

(8)

Outer rotor

(20)

Oil strainer

T3: 6.4 (0.65, 4.7)

(9)

Oil pump cover

(21)

Oil level gauge guide

T4: 10 (1.0, 7.2)

(10)

Oil filter

(22)

Oil pan

T5: 25 (2.5, 18.4)

(11)

O-ring

(23)

Oil level gauge

T6: 44 (4.5, 32.5)

(12)

Oil pump ASSY

(24)

Drain plug

LU-02132

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(13)

(14)

(15)

(16)

(17)

(19)

(20)

(26)

T6

T4

T2

T5

T3

T1

T1

(23)

T1

T1

T6

(24)

(22)

(25)

(21)

T4

(18)

(27)

(11)

(12)

T3

T3