1997 SUBARU LEGACY Cooling fan

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 Cooling System
Trouble Possible cause Corrective action
Over-heatinga. Insufficient engine coolantReplenish engine coolant, inspect for leakage, and
repair.
b. Loose timing belt Repair or replace timing belt tensioner.
c. Oil on drive belt Replace.
d. Malfunction of thermostat Replace.
e. Malfunction of engine coolant pump Replace.
f. Clogged engine coolant passage Clean.
g. Improper ignition timingInspect and repair ignition control system.

h. Clogged or leaking radiator Clean or repair, or replace.
i. Improper engine oil in engine coolant Replace engine coolant.
j. Air/fuel mixture ratio too leanInspect and repair fuel injection system.

k. Excessive back pressure in exhaust system Clean or replace.
l. Insufficient clearance between piston and cylinder Adjust or replace.
m. Slipping clutch Repair or replace.
n. Dragging brake Adjust.
o. Improper transmission oil Replace.
p. Defective thermostat Replace.
q. Malfunction of electric fanInspect radiator fan relay, engine coolant temperature
sensor or radiator motor and replace there.
Over-coolinga. Atmospheric temperature extremely low Partly cover radiator front area.
b. Defective thermostat Replace.
Engine coolant
leaks.a. Loosened or damaged connecting units on hoses Repair or replace.
b. Leakage from engine coolant pump Replace.
c. Leakage from engine coolant pipe Repair or replace.
d. Leakage around cylinder head gasket Retighten cylinder head bolts or replace gasket.
e. Damaged or cracked cylinder head and crankcase Repair or replace.
f. Damaged or cracked thermostat case Repair or replace.
g. Leakage from radiator Repair or replace.
Noisea. Defective drive belt Replace.
b. Defective radiator fan Replace.
c. Defective engine coolant pump bearing Replace engine coolant pump.
d. Defective engine coolant pump mechanical seal Replace engine coolant pump.
20
2-5DIAGNOSTICS
1. Engine Cooling System

1) Set the vehicle on lift arms.
2) Open front hood fully and support with stay.
G2M0341
3) Release fuel pressure.
(1) Disconnect fuel tank connector.
(2) Start the engine, and run until it stalls.
(3) After the engine stalls, crank it for five seconds
more.
(4) Turn ignition switch to“OFF”.

G6M0095
4) Disconnect battery cables and remove battery from
vehicle.
B2M0015A
5) Drain coolant.
Set container under the vehicle, and remove drain cock
from radiator.
G2M0263
6) Remove cooling system.
(1) Disconnect radiator fan motor connector.
(2) Disconnect radiator outlet hose from thermostat
cover.
9
2-11SERVICE PROCEDURE
2. Engine

B2M0307A
15) Install cooling system.
(1) Attach radiator mounting cushions to body.
G2M0220
(2) Install radiator while fitting radiator pins to cush-
ions.
B2M0320
(3) Install radiator brackets and tighten bolts.
Tightening torque:
13.7±1.5 N⋅m (1.4±0.15 kg-m, 10.1±1.1 ft-lb)
G2M0263
(4) Connect radiator fan motor connector.
G2M0267
(5) Connect radiator inlet hose.
25
2-11SERVICE PROCEDURE
2. Engine

1. Air Conditioning System
A: SPECIFICATIONS
Item Specifications
Type of air conditionerReheat air-mix type
Cooling capacity (IMACA)4.885 kW
(4,200 kcal/h, 16,666 BTU/h)
RefrigerantHFC-134a (CH
2FCF3)
[0.55 — 0.65 kg
(1.21 — 1.43 lb)]
CompressorType 5-vane rotary, fix volume (DKV-14D)
Discharge 140 cm
3(8.54 cu in)/rev
Max. permissible speed 7,000 rpm
Magnet clutchTy p eDry, single-disc type
Power consumption 45 W
Type of belt V-Ribbed 4 PK
Pulley dia. (effective dia.) 125 mm (4.92 in)
Pulley ratio1.064
CondenserType Corrugated fin (Multi-flow)
Core face area 0.215 m
2(2.31 sq ft)
Core thickness 19 mm (0.75 in)
Radiation area 4.7 m
2(51 sq ft)
Receiver drier Effective inner capacity 290 cm3(17.70 cu in)
Expansion valve TypeInternal equalizing
EvaporatorTy p eA
-laminate
Dimensions (W x H x T)74 x 224 x 235 mm
(2.91 x 8.82 x 9.25 in)
Blower fanFan typeSirocco fan
Outer diameter x width 150 x 75 mm (5.91 x 2.95 in)
Power consumption 230 W at 12 V
Condenser fan
(Sub fan)Motor typeMagnet
Power consumption 120 W at 12 V
Fan outer diameter 320 mm (12.60 in)
Radiator fan
(Main fan)Motor typeMagnet
Power consumption 120 W at 12 V
Fan outer diameter 320 mm (12.60 in)
Idling speed with
F.I.C.D. in operationMPFI model 850±100 rpm (700±100 rpm “D” range in AT model)
Dual switch
(Pressure switch)
High-pressure line
B4M0755A
Compressor relief valve
blow-out pressure
B4M0084A
Thermo control
amplifier working
temperature
(Evaporator outlet air)
B4M0756A
2
4-7SPECIFICATIONS
1. Air Conditioning System

Condition Probable cause Corrective action
FAULTY CONDENSER
G4M0680
No cooling action;
Engine may overheat.
Suction line is very hot.Condenser is often
found not functioning
well.Check condenser
cooling fan.
Check condenser for
dirt accumulation.
Check engine cooling
system for overheat.
Check for refrigerant
overcharge.
If pressure remains
high in spite of all
above actions taken,
remove and inspect
the condenser for pos-
sible oil clogging.
HIGH-PRESSURE LINE BLOCKED
G4M0681
Insufficient cooling;
Frosted high-pressure
liquid line.Drier is clogged, or
restriction in high-pres-
sure line.1. Discharge system.
2. Remove receiver
drier or strainer and
replace it.
3. Evacuate and charge
system.
FAULTY COMPRESSOR
G4M0682
Insufficient cooling Internal problem is in
compressor, or dam-
aged gasket and valve.1. Discharge system.
2. Remove and check
compressor.
3. Repair or replace
compressor.
4. Check oil level.
5. Replace receiver
drier.
6. Evacuate and charge
system.
44
4-7DIAGNOSTICS
2. Performance Test Diagnosis

B: CHECK LIST FOR INTERVIEW
1. CHECK LIST NO. 1
Check the following items when problem has occurred.
NOTE:
Use copies of this page for interviewing customers.
Customer’s name Engine no.
Date of sale Fuel brand
Date of repair Odometer reading km
Vin no.miles
WeatherFine
Cloudy
Rainy
Snowy
Various/Others:
Outdoor temperature F(°C)
Hot
Warm
Cool
Cold
PlaceHighway
Suburbs
Inner city
Uphill
Downhill
Rough road
Others:
Engine temperatureCold
Warming-up
After warming-up
Any temperature
Others:
Engine speed rpm
Vehicle speed MPH
Driving conditionsNot affected
At starting
While idling
At racing
While accelerating
While cruising
While decelerating
While turning (RH/LH)
HeadlightON/OFF Rear defoggerON/OFF
BlowerON/OFF RadioON/OFF
A/C compressorON/OFF CD/CassetteON/OFF
Cooling fanON/OFF Car phoneON/OFF
Front wiperON/OFF CBON/OFF
Rear wiperON/OFF
86
2-7ON-BOARD DIAGNOSTICS II SYSTEM
6. Basic Diagnostic Procedure