engine SUBARU LEGACY 1996 Service Repair Manual

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

G2M0091
B: INSTALLATION
1) Install oil pressure switch onto engine block.
Tightening torque:
25±3 N⋅m (2.5±0.3 kg-m, 18.1±2.2 ft-lb)
2) Connect terminal of oil pressure switch.
G2M0090
3) Install generator on bracket and temporary tighten
installing bolts.
B2M0017
4) Install front side V-belt and adjust it.

5) Install V-belt cover.
G2M0088
6) Connect connector and terminal to generator.
16
2-4SERVICE PROCEDURE
3. Oil Pressure Switch

1. Engine Lubrication System
Before troubleshooting, make sure that the engine oil level
is correct and no oil leakage exists.
Trouble Possible cause Corrective action
1. Warning light remains
on.1) Oil pressure switch
failureCracked diaphragm or oil leakage within switch Replace.
Broken spring or seized contacts Replace.
2) Low oil pressureClogged oil filter Replace.
Malfunction of oil by-pass valve of oil filter Clean or replace.
Malfunction of oil relief valve of oil pump Clean or replace.
Clogged oil passage Clean.
Excessive tip clearance and side clearance of oil
pump rotor and gearReplace.
Clogged oil strainer or broken pipe Clean or replace.
3) No oil pressureInsufficient engine oil Replenish.
Broken pipe of oil strainer Replace.
Stuck oil pump rotor Replace.
2. Warning light does not
go on.1) Burn-out bulb Replace.
2) Poor contact of switch contact points Replace.
3) Disconnection of wiring Repair.
3. Warning light flickers
momentarily.1) Poor contact at terminals Repair.
2) Defective wiring harness Repair.
3) Low oil pressureCheck for the same pos-
sible causes as listed in
1.—2)
17
2-4DIAGNOSTICS
1. Engine Lubrication System

1. Engine Cooling System
A: SPECIFICATIONS
1. 2200 cc MODEL
Cooling systemElectric fan + Forced engine coolant circulation
system
Total engine coolant capacity
(US qt, Imp qt) Approx. 6.1 (6.4, 5.4)
Engine
coolant
pumpTypeCentrifugal impeller type
Discharge performance IDischarge 20
(5.3 US gal, 4.4 Imp gal)/min.
Pump speed—total engine cool-
ant head760 rpm — 0.3 mAq (1.0 ftAq)
Engine coolant temperature 85°C (185°F)
Discharge performance IIDischarge 100
(26.4 US gal, 22.0 Imp gal)/min.
Pump speed—total engine cool-
ant head3,000 rpm — 5.0 mAq (16.4 ftAq)
Engine coolant temperature 85°C (185°F)
Discharge performance IIIDischarge 200
(52.8 US gal, 44.0 Imp gal)/min.
Pump speed—total engine cool-
ant head6,000 rpm — 23.0 mAq (75.5 ftAq)
Engine coolant temperature 85°C (185°F)
Impeller diameter 76 mm (2.99 in)
Number of impeller vanes 8
Pump pulley diameter 60 mm (2.36 in)
ThermostatTypeWax pellet type
Starts to open 76 — 80°C (169 — 176°F)
Fully opened91°C (196°F)
Valve lift9.0 mm (0.354 in) or more
Valve bore35 mm (1.38 in)
Radiator fanMotor120 W
Fan diameter x Blade 320 mm (12.60 in) x 5
RadiatorTypeCross flow, pressure type
Core dimensions670x361x16mm
(26.38 x 14.21 x 0.63 in)
Pressure range in which cap valve is openAbove: 88±10 kPa
(0.9±0.1 kg/cm
2, 12.8±1.4 psi)
Below: 4.9 to 9.8 kPa
(0.05 to 0.1 kg/cm
2, 0.7 to 1.4 psi)
FinsCorrugated fin type
Reservoir
tankCapacity 0.5
(0.5 US qt, 0.4 Imp qt)
2
2-5SPECIFICATIONS AND SERVICE DATA
1. Engine Cooling System

2. 2500 cc MODEL
Cooling systemElectric fan + Forced engine coolant circulation
system
Total engine coolant capacity
(US qt, Imp qt) Approx. 6.1 (6.4, 5.4)
Engine
coolant
pumpTypeCentrifugal impeller type
Discharge performance IDischarge 20
(5.3 US gal, 4.4 Imp gal)/min.
Pump speed—total engine cool-
ant head760 rpm—0.3 mAq (1.0 ftAq)
Engine coolant temperature 85°C (185°F)
Discharge performance IIDischarge 100
(26.4 US gal, 22.0 Imp gal)/min.
Pump speed—total engine cool-
ant head3,000 rpm—5.0 mAq (16.4 ftAq)
Engine coolant temperature 85°C (185°F)
Discharge performance IIIDischarge 200
(52.8 US gal, 44.0 Imp gal)/min.
Pump speed—total engine cool-
ant head6,000 rpm—23.0 mAq (75.5 ftAq)
Engine coolant temperature 85°C (185°F)
Impeller diameter 76 mm (2.99 in)
Number of impeller vanes 8
Pump pulley diameter 60 mm (2.36 in)
ThermostatTypeWax pellet type
Starts to open 76—80°C (169—176°F)
Fully opened91°C (196°F)
Valve lift9.0 mm (0.354 in) or more
Valve bore35 mm (1.38 in)
Radiator fanMotor120 W (main fan)
140 W (sub fan)
Fan diameter x Blade340 mm (13.39 in) x 5 (main fan)
280 mm (11.02 in) x 4 (sub fan)
RadiatorTypeCross flow, pressure type
Core dimensions670x361x25mm
(26.38 x 14.21 x 0.98 in)
Pressure range in which cap valve is openAbove: 88±10 kPa
(0.9±0.1 kg/cm
2, 12.8±1.4 psi)
Below:4.9 to9.8 kPa
(0.05 to0.1 kg/cm
2,0.7 to1.4 psi)
FinsCorrugated fin type
Reservoir
tankCapacity 0.5
(0.5 US qt, 0.4 Imp qt)
B: SERVICE DATA
Engine
coolant
pumpClearance between impeller and caseStandard
Limit0.5—0.7 mm (0.020—0.028 in)
1.0 mm (0.039 in)
“Thrust”runout of impeller end 0.5 mm (0.020 in)
3
2-5SPECIFICATIONS AND SERVICE DATA
1. Engine Cooling System

1. Engine Coolant Pump
G2M0201

1Engine coolant pump ASSY


2Gasket


3Heater hose


4Thermostat


5Gasket


6Thermostat case
Tightening torque: N⋅m (kg-m, ft-lb)
T1: First 10+4
0(1.0+0.4
0, 7.2+2.9
0)
Second 10+4
0(1.0+0.4
0, 7.2+2.9
0)
T2: 6.4±0.5 (0.65±0.05, 4.7±0.4)
4
2-5COMPONENT PARTS
1. Engine Coolant Pump