Subaru Legacy (2005 year). Service manual — part 89
LUBRICATION
LU(H4SO 2.0)
Page
General Description . . . . . . . . . . . . . . . . . . . . . 2
Oil Pressure System . . . . . . . . . . . . . . . . . . . . ...7
Engine Oil. . . . . . . . . . . . . . . . . . . . . . . . . 9
Oil Pump . . . . . . . . . . . . . . . . . . . . . . . . ...11
Oil Pan and Strainer. . . . . . . . . . . . . . . . . . . . ..15
Oil Pressure Switch. . . . . . . . . . . . . . . . . . . . ...18
Engine Oil Filter. . . . . . . . . . . . . . . . . . . . . . .19
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
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