Subaru Impreza 2003, Service Manual

Page: 1144 / 3610

LU(H4DOTC)-2
LUBRICATION
GENERAL DESCRIPTION
1. General Description
A: SPECIFICATIONS
Lubrication method Forced lubrication
Oil pump
Pump type Trochoid type
Number of teeth
Inner rotor 9
Outer rotor 10
Outer rotor diameter
×
thickness 78
×
10 mm (3.07
×
0.39 in)
Tip clearance between inner and outer rotor
STANDARD 0.04 — 0.14 mm (0.0016 — 0.0055 in)
LIMIT 0.18 mm (0.0071 in)
Side clearance between inner rotor and pump
case
STANDARD 0.02 — 0.07 mm (0.0008 — 0.0028 in)
LIMIT 0.12 mm (0.0047 in)
Case clearance between outer rotor and pump
case
STANDARD 0.10 — 0.175 mm (0.0039 — 0.0069 in)
LIMIT 0.20 mm (0.0079 in)
Capacity at 80
°
C (176
°
F)
600 rpm
Discharge
pressure
98 kPa (1.0 kg/cm
2
, 14 psi)
Discharge
quantity
4.6
2
(4.9 US qt, 4.0 Imp qt)/min.
5,000 rpm
Discharge
pressure
294 kPa (3.0 kg/cm
2
, 43 psi)
Discharge
quantity
47.0
2
(49.7 US qt, 41.4 Imp qt)/min.
Relief valve operation pressure
588 kPa (6.0 kg/cm
2
, 85 psi)
Oil filter
Type Full-flow filter type
Filtration area
760 cm
2
(118 sq in)
By-pass valve opening pressure
157 kPa (1.60 kg/cm
2
, 22.8 psi)
Outer diameter
×
width 80
×
70 mm (3.15
×
2.76 in)
Oil filter to engine thread size M 20
×
1.5
Oil pressure
switch
Type Immersed contact point type
Working voltage — wattage 12 V — 3.4 W or less
Warning light activation pressure
14.7 kPa (0.15 kg/cm
2
, 2.1 psi)
Proof pressure
More than 981 kPa (10 kg/cm
2
, 142 psi)
Oil capacity (at replacement) 4.5
2
(4.8 US qt, 4.0 Imp qt)