1997 SUBARU LEGACY engine

2. 2500 cc MODEL
Lubrication methodForced lubrication
Oil pumpPump typeTrochoid type
Number of teethInner rotor 9
Outer rotor 10
Outer rotor diameter x thickness 78 x 10 mm (3.07 x 0.39 in)
Tip clearance between inner and outer rotorSTANDARD 0.04—0.14 mm (0.0016—0.0055 in)
LIMIT 0.18 mm (0.0071 in)
Side clearance between inner rotor and pump
caseSTANDARD 0.02—0.07 mm (0.0008—0.0028 in)
LIMIT 0.15 mm (0.0059 in)
Case clearance between outer rotor and pump
caseSTANDARD 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) or more
- quantity 4.6
(4.9 US qt, 4.0 Imp qt)/min.
5,000 rpm Discharge- pressure 294 kPa (3.0 kg/cm
2, 43 psi) or more
- quantity 47.0
(12.4 US gal, 10.3 Imp gal)/min.
Relief valve operation pressure 588 kPa (6.0 kg/cm
2, 85 psi)
Oil filterTypeFull-flow filter type
Filtration area 1,000 cm
2(155 sq in)
By-pass valve opening pressure 157 kPa (1.6 kg/cm
2, 23 psi)
Outer diameter x width 80 x 70 mm (3.15 x 2.76 in)
Oil filter to engine thread size M 20 x 1.5
Oil pressure
switchTypeImmersed 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 pan capacity4.5
(4.8 US qt, 4.0 Imp qt)
3
2-4SPECIFICATIONS AND SERVICE DATA
1. Lubrication System

G2M0066
1. Oil Pump
A: REMOVAL
1) Drain engine oil.
Set container under the vehicle, and remove drain plug
from oil pan.
B2M0051A
2) Drain coolant.
Set container under the vehicle, and remove drain cock
from radiator.
B2M0302
3) Remove belt covers, timing belt and related parts.

B2M0303
4) Remove belt tensioner bracket.
G2M0210
5) Remove left cam sprocket and left belt cover No. 2.
6) Remove water pump.
5
2-4SERVICE PROCEDURE
1. Oil Pump

B2M0724
2. Oil Pan and Oil Strainer
A: REMOVAL
1) Remove front wheels.
2) Remove air intake duct.
3) Disconnect connector from front oxygen sensor.
B2M0725
4) Disconnect connector from rear oxygen sensor. (Cali-
fornia 2200 cc model only)
G2M0295
5) Remove pitching stopper.
B2M0320
6) Remove radiator upper brackets.
B2M0053
7) Support engine with a lifting device and wire ropes.
8) Lift-up the vehicle.
CAUTION:
At this time, raise up wire ropes.
9
2-4SERVICE PROCEDURE
2. Oil Pan and Oil Strainer

G2M0066
9) Drain engine oil.
Set container under the vehicle, and remove drain plug
from oil pan.
B2M0312
10) Disconnect connector from rear oxygen sensor.
(Except California 2200 cc model)
B2M0054
11) Remove front exhaust pipe.
(1) Separate front catalytic converter from center
exhaust pipe.
(2) Remove front exhaust pipe from engine.
(3) Remove bolt which installs front exhaust pipe on
bracket.
B2M0743A
12) Remove nuts which install front cushion rubber onto
front crossmember.
G2M0081
13) Remove bolts which install oil pan on cylinder block
while raising up engine.
14) Insert oil pan cutter blade between cylinder block-to-oil
pan clearance.
CAUTION:
Do not use a screwdriver or similar tool in place of oil
pan cutter.
10
2-4SERVICE PROCEDURE
2. Oil Pan and Oil Strainer

G2M0082
15) Separate oil strainer from oil strainer stay.
G2M0376
16) Remove oil strainer.
G2M0377
17) Remove baffle plate and oil strainer stay.
B: INSPECTION
By visual check make sure oil pan, oil strainer, oil strainer
stay and baffle plate are not damaged.
G2M0377
C: INSTALLATION
CAUTION:
Before installing oil pan, clean sealant from oil and
engine block.
1) Install baffle plate and oil strainer stay.
Tightening torque:
5N⋅m (0.5 kg-m, 3.6 ft-lb)
11
2-4SERVICE PROCEDURE
2. Oil Pan and Oil Strainer

G2M0376
2) Install oil strainer onto baffle plate.
CAUTION:
Replace O-ring with a new one.
Tightening torque:
9.8 N⋅m (1.0 kg-m, 7 ft-lb)
G2M0082
3) Hold oil strainer to oil strainer stay.
Tightening torque:
9.8 N⋅m (1.0 kg-m, 7 ft-lb)
G2M0084
4) Apply fluid packing to mating surfaces and install oil
pan.
Fluid packing:
THREE BOND 1207C or equivalent
G2M0081
5) Tighten bolts which install oil pan onto engine block.
Tightening torque:
9.8 N⋅m (1.0 kg-m, 7 ft-lb)
6) Tighten drain plug.
Tightening torque:
44
+4.8
0N⋅m (4.5+0.5
0kg-m, 33+3.6
0ft-lb)
CAUTION:
Replace drain plug gasket with new one.
B2M0743A
7) Lower engine onto front crossmember.
8) Tighten nuts which install front cushion rubber onto front
crossmember.
Tightening torque:
69±15 N⋅m (7.0±1.5 kg-m, 51±11 ft-lb)
12
2-4SERVICE PROCEDURE
2. Oil Pan and Oil Strainer

B2M0054
9) Install front exhaust pipe.
CAUTION:
Always use the new gaskets.
(1) Place front exhaust pipe on bracket.
(2) Tighten nuts which install front exhaust pipe on
engine.
Tightening torque:
30±5 N⋅m (3.1±0.5 kg-m, 22.4±3.6 ft-lb)
B2M0055
(3) Tighten nuts which install front catalytic converter to
center exhaust pipe.
Tightening torque:
35±5 N⋅m (3.6±0.5 kg-m, 26.0±3.6 ft-lb)
B2M0056
(4) Tighten bolt which installs front exhaust pipe on
bracket.
Tightening torque:
24±3 N⋅m (2.4±0.3 kg-m, 17.4±2.2 ft-lb)
B2M0312
10) Connect connector to rear oxygen sensor. (Except
California 2200 cc model)
B2M0053
11) Lower the vehicle.
CAUTION:
At this time, lower lifting device and release steel
cables.
12) Remove lifting device and steel cables.
13
2-4SERVICE PROCEDURE
2. Oil Pan and Oil Strainer

B2M0724
13) Connect connector to front oxygen sensor.
B2M0725
14) Connect connector to rear oxygen sensor. (California
2200 cc model only)
G2M0302
15) Install pitching stopper.
Tightening torque:
T1: 49±5 N⋅m (5.0±0.5 kg-m, 36.2±3.6 ft-lb)
T2: 57±10 N⋅m (5.8±1.0 kg-m, 42±7 ft-lb)
B2M0320
16) Install radiator upper brackets.
Tightening torque:
12±3 N⋅m (1.2±0.3 kg-m, 8.7±2.2 ft-lb)
B2M0321
17) Install air intake duct.
18) Fill engine oil through filler pipe up to upper point of
level gauge.
Engine oil capacity:
2200 cc ; Upper level
4.0
(4.2 US qt, 3.5 Imp qt)
Lower level
3.0
(3.2 US qt, 2.6 Imp qt)
2500 cc ; Upper level
4.5
(4.8 US qt, 4.0 Imp qt)
14
2-4SERVICE PROCEDURE
2. Oil Pan and Oil Strainer