Subaru Legacy IV (2008 year). Service manual — part 86
CO(H4SO)-30
Engine Cooling System Trouble in General
COOLING
LU(H4SO)-2
General Description
LUBRICATION
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)
Non-turbo model
76 × 10 (2.99 × 0.39)
Turbo model
78 × 10 (3.07 × 0.39)
Tip clearance between inner and outer
rotors
Standard
mm (in)
0.04 — 0.14 (0.0016 — 0.0055)
Side clearance between inner rotor and
pump case
Standard
mm (in)
0.02 — 0.07 (0.0008 — 0.0028)
Case clearance between outer rotor and
pump case
Standard
mm (in) 0.10 — 0.175 (0.0039 — 0.0069)
Performance
(Oil temperature 80°C
(176°F))
600 rpm
Discharge
pressure
kPa (kg/cm
2
, psi)
98 (1.0, 14)
Discharge
rate
2 (US qt, Imp qt)/min.
4.6 (4.9, 4.0) or more
5,000 rpm
Discharge
pressure
kPa (kg/cm
2
, psi)
294 (3.0, 43)
Discharge
rate
2 (US qt, Imp qt)/min.
47.0 (49.7, 41.4) or more
Relief valve working pressure
kPa (kg/cm
2
, psi)
588 (6.0, 85)
Oil filter
Filter type
Full-flow filter type
Filtration area
cm
2
(sq in)
Outer diameter: 68 mm (2.68 in) (Black)
800 (124)
Outer diameter: 67.4 mm (2.65 in) (Blue)
555 (86)
By-pass valve opening pressure
kPa (kg/cm
2
, psi)
160 (1.63, 23.2)
Outer diameter
× width
mm (in)
Outer diameter: 68 mm (2.68 in) (Black)
68 × 65 (2.68 × 2.56)
Outer diameter: 67.4 mm (2.65 in) (Blue)
67.4 × 65.3 (2.65 × 2.57)
Installation screw specifications
M 20 × 1.5
Oil pressure
switch
Type
Immersed contact point type
Operating voltage — power consumption
12 V — 3.4 W or less
Warning light operating pressure
kPa (kg/cm
2
, psi)
14.7 (0.15, 2.1)
Proof pressure
kPa (kg/cm
2
, psi)
981 (10, 142) or more
Engine oil
Total capacity (Overhaul)
2 (US qt, Imp qt)
5.0 (5.3, 4.4)
When replacing engine oil and oil filter
2 (US qt, Imp qt)
Non-turbo model: 4.2 (4.4, 3.7)
Turbo model: 4.3 (4.5, 3.8)
When replacing engine oil only
2 (US qt, Imp qt)
4.0 (4.2, 3.5)
LU(H4SO)-3
General Description
LUBRICATION
Recommended oil:
Oil complying with one of the following stan-
dards:
• For API standard, oil with SM “Energy Con-
serving” logo
• For ILSAC standard, oil with GF-4 “Star burst
mark” label on the container
CAUTION:
It is acceptable to fill an engine with oil of an-
other brand when replacing the oil, but make
sure to use an oil with an API standard and SAE
viscosity number specified by Subaru.
NOTE:
• The proper viscosity oil helps the engine main-
tain its ideal temperature, and cranking speed in-
creased by reducing viscosity friction in hot
condition.
• If the vehicle is used in regions of high tempera-
tures or in other severe environments, use oil with
the viscosities shown below.
API standard: SM or SL
SAE viscosity No.: 30, 40, 10W-50, 20W-40, 20W-
50
(1) SAE viscosity No. and applicable temperature
(2) Recommended
( C)
-30 -20 -15
0
15
30
40
-22
-4
5
32
59
86 104
SAE (1)
( F)
10W-30, 10W-40 , 10W-50
5W-30 (2)
LU-02329
LU(H4SO)-4
General Description
LUBRICATION
B: COMPONENT
• NON-TURBO MODEL
(1)
Plug
(15)
Gasket
(29)
Rocker cover
(2)
Gasket
(16)
Oil filler cap
(30)
O-ring
(3)
Relief valve spring
(17)
O-ring
(31)
Oil filter connector
(4)
Relief valve
(18)
Baffle plate
(32)
Plug
(5)
Front oil seal
(19)
O-ring
(6)
Oil pump case
(20)
Oil strainer
Tightening torque:N·m (kgf-m, ft-lb)
(7)
Inner rotor
(21)
Oil level gauge guide
T1: 5 (0.5, 3.7)
(8)
Outer rotor
(22)
O-ring
T2: 6.4 (0.7, 4.7)
(9)
Oil pump cover
(23)
Oil pan
T3: 10 (1.0, 7.4)
(10)
Oil filter
(24)
Oil level gauge
T4: 25 (2.5, 18.4)
(11)
O-ring
(25)
Drain plug
T5: 44 (4.5, 32.5)
(12)
Oil pump ASSY
(26)
Drain plug gasket
T6: 5.4 (0.6, 4.0)
(13)
Oil pressure switch
(27)
Gasket
T7: 45 (4.6, 33.2)
(14)
Oil filler duct
(28)
Seal
T8: 70 (7.1, 51.6)
(12)
(11)
T4
T2
T6
T2
T1
T5
T5
T2
T2
(13)
(9)
(8)
(7)
(6)
(27)
(17)
(15)
(14)
(29)
(16)
(24)
(30)
(23)
(25)
(26)
(5)
(4)
(3)
(2)
(1)
(22)
(21)
T2
(28)
T3
T2
(20)
(19)
(18)
T2
(32)
T8
(31)
(10)
T7
LU-02471
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