engine SUBARU LEGACY 1997 Service Repair Manual

G6M0088
2) Carbon fouled
Dry fluffy carbon deposits on insulator and electrode are
mostly caused by slow speed driving in city, weak ignition,
too rich fuel mixture, dirty air cleaner, etc.
It is advisable to replace with plugs having hotter heat
range.
G6M0089
3) Oil fouled
Wet black deposits show excessive oil entrance into com-
bustion chamber through worn rings and pistons or exces-
sive clearance between valve guides and stems. If same
condition remains after repair, use a hotter plug.
G6M0090
4) Overheating
White or light gray insulator with black or gray brown spots
and bluish burnt electrodes indicate engine overheating.
Moreover, the appearance results from incorrect ignition
timing, loose spark plugs, wrong selection of fuel, hotter
range plug, etc. It is advisable to replace with plugs having
colder heat range.
G6M0091
C: CLEANING AND REGAPPING
Clean spark plugs in a sand blast type cleaner.
Avoid excessive blasting. Clean and remove carbon or
oxide deposits, but do not wear away porcelain.
If deposits are too stubborn, discard plugs.
After cleaning spark plugs, recondition firing surface of
electrodes with file. Then correct the spark plug gap using
a gap gauge.
Spark plug gap: L
1.0—1.1 mm (0.039—0.043 in)
D: REMOVAL AND INSTALLATION (2500 cc
EXCEPT OUTBACK MODEL)
CAUTION:
All spark plugs installed on an engine, must be of the
same heat range.
Spark plug:
NGK: PFR5B-11
24
6-1SERVICE PROCEDURE
3. Spark Plug

B6M0563A
6) Remove #4 spark plug cord by pulling boot, not cord
itself.
B6M0564
7) Remove spark plug with the spark plug socket.
8) Installation is in the reverse order of removal.
Tightening torque (Spark plug):
20.6±2.9 N⋅m (2.10±0.30 kg-m, 15.19±2.14 ft-lb)
CAUTION:
The above torque should be only applied to new spark
plugs without oil on their threads.
In case their threads are lubricated, the torque should
be reduced by approximately 1/3 of the specified
torque in order to avoid over-stressing.
E: REMOVAL (2500 cc OUTBACK MODEL)
CAUTION:
All spark plugs installed on an engine, must be of the
same heat range.
Spark plug:
NGK: PFR5B-11
G6M0095
1. #1 SPARK PLUG
1) Disconnect battery ground cable.
29
6-1SERVICE PROCEDURE
3. Spark Plug

1. Starter
Trouble Probable cause
Starter does not start.Magnet switch does not operate.
(no clicks are heard.)Magnet switch poor contact or discontinuity
of pull-in coil circuit
Improper sliding of magnet switch plunger
Magnet switch operates.
(clicks are issued.)Poor contact of magnet switch’s main con-
tact point
Layer short of armature
Contaminants on armature commutator
High armature mica
Improper grounding of yoke field coil
Insufficient carbon brush length
Insufficient brush spring pressure
Starter starts but does not crank engine.Failure of pinion gear to engage ring gearWorn pinion teeth
Improper sliding of overrunning clutch
Improper adjustment of stud bolt
Clutch slippage Faulty clutch roller spring
Starter starts but engine cranks too slowly.Poor contact of magnet switch’s main con-
tact point
Layer short of armature
Discontinuity, burning or wear of armature
commutator
Poor grounding of yoke field coil
Insufficient brush length
Insufficient brush spring pressure
Abnormal brush wear
Starter overruns.Magnet switch coil is a layer short.
38
6-1DIAGNOSTICS
1. Starter

2. Generator
Turn ignition switch ON
(engine OFF).
Check if charge bulb
comes on.
YES
NO
Disconnect generator
body harness
connector.
Turn ignition switch to
“START.”(engine starts.)Check if charge bulb
comes on when terminal
(L) of body harness
connector is grounded.
YES
NO
Replace charge bulb.
Check IC regulator.
Check positive terminal
of diode.
Check if charge bulb is
OFF while engine idles.
NO
YES (Remains ON or blinks.)
Check or replace fan belt.
Check generator.
Check S or BAT terminal for improper
contact.
Measure VB* of battery
while running engine at
1,500 rpm.15.5 V is less than VB.
Replace IC regulator
assembly.
VB is less
than 12.5 V.12.5 V is less than or equal to VB, and
VB is less than or equal to 15.5 V.
Check IC regulator as a
single unit.
Turn light switch ON
while engine idles.Check if charge bulb
comes on.
YES
NO
No problems
Check diode assembly.
*: Terminal voltage







39
6-1DIAGNOSTICS
2. Generator

1. Body Electrical
A: SPECIFICATIONS
BatteryReserve capacity 82 minutes (MT), 100 minutes (AT)
Cold cranking ampere 430 amperes (MT), 490 amperes (AT)
Fuse10 A, 15 A, 20 A
Combination
meterSpeedometer Electric pulse type
Tachometer Electric impulse type
Water temperature gauge Thermistor cross coil type
Fuel gauge Resistance cross coil type
Charge indicator light 12 V—1.4 W
Brake fluid level warning/parking brake indicator light 12 V—1.4 W
AT oil temperature warning light (AWD only) 12 V—1.4 W
ABS warning light 12 V—1.4 W
CHECK ENGINE warning light
(Malfunction indicator lamp)12 V—1.4 W
Oil pressure warning light 12 V—1.4 W
AIRBAG system warning light 12 V—1.4 W
Low fuel warning light 12 V—3W
FWD indicator light 12 V—1.4 W
TCS warning light 12 V—1.4 W
TCS indicator light 12 V—1.4 W
Turn signal indicator light 12 V—1.4 W (2 pieces)
Seat belt warning light 12 V—1.4 W
Door open warning light 12 V—1.4 W (5 pieces)
Headlight beam indicator light 12 V—1.4 W
Meter illumination light12 V—3 W (2 pieces)
12 V—3.4 W (4 pieces)
Headlight 12 V—60/55 W (Halogen)
Front clearance light 12 V—5W
Turn signal lightFront 12 V—21 W
Rear 12 V—21 W
Tail/Stop light 12 V—5/21 W
Back-up light 12 V—21 W
High-mount stop light12 V—18 W (SEDAN), 12 V—13 W
(WAGON)
License plate light 12 V—5W
Room light 12 V—8W
Trunk room light (SEDAN) 12 V—5W
Luggage room light (WAGON) 12 V—5W
Spot light 12 V—8 W (2 pieces)
Glove box light 12 V—3.4 W
Ash tray illumination light 12 V—1.7 W
Selector lever illumination light (AT model) 12 V—1.7 W
2
6-2SPECIFICATIONS
1. Body Electrical

B6M0336A
2) Look at the beam angle gauge (vertical movement).
The bubble on the gauge should not deviate from the cen-
ter of the gauge.
B6M0825A
3) Look at the beam angle gauge (horizontal movement).
The indicator should not deviate from the center of the
gauge by more than two segments on either side of the
gauge.
B: REMOVAL AND INSTALLATION
1. HEADLIGHT BULB
1) Disconnect the connector from inside of the engine
compartment.
2) Remove rubber cap.
3) Remove the light bulb retaining spring to remove the
bulb.
4) Replace the bulb with a new one and hook the spring.
5) Attach the rubber cap and connect the connector.
M6A0139
CAUTION:

Since the tungsten halogen bulb operates at high
temperature, dirt and oil on the bulb surface decreases
the bulb’s useful life. When replacing the bulb, hold the
flange portion and do not touch the glass portion.
9
6-2SERVICE PROCEDURE
4. Headlight

6. Turn Signal and Hazard Warning
Light
A: REMOVAL AND INSTALLATION
1. FRONT TURN SIGNAL LIGHT
Refer to 6-2 [W4B2] as for removal and installation of front
turn signal light.
NOTE:
The front turn signal light is united with headlight assem-
bly.
2. REAR COMBINATION LIGHT
Refer to 6-2 [W5A1] as for removal and installation of rear
combination light.
3. COMBINATION SWITCH
Refer to 6-2 [W4B3] as for removal and installation of com-
bination switch.
B6M0063
4. HAZARD SWITCH
1) Remove center panel from instrument panel. 5-4 [W1A0].>
2) Disconnect connector of hazard switch from body har-
ness.
3) Remove hazard switch from center panel.
B6M0343A
5. TURN SIGNAL AND HAZARD UNIT
1) Remove instrument panel lower cover.
2) Remove engine hood opener lever bracket.
3) Disconnect connector of turn signal and hazard unit.
4) Remove screw, and then remove turn signal and haz-
ard unit from bracket.
19
6-2SERVICE PROCEDURE
6. Turn Signal and Hazard Warning Light

G6M0118
2. WIPER ARM
1) Open engine hood.
2) Remove cap of wiper arm installation nut.
3) Remove the nut which secures wiper arm.
4) Remove wiper arm.
5) Installation is in the reverse order of removal.
NOTE:
Remove metal sludge from the wiper arm fixture before
installing it.
Tightening torque:
20±3 N⋅m (2.0±0.3 kg-m, 14.5±2.2 ft-lb)
3. WIPER MOTOR AND LINK
1) Detach weatherstrip and cowl panel. [W10A0].>
NOTE:
Apply silicone oil or soap water to both sides of cowl net to
facilitate removal.
B6M0108
2) Disconnect connector of wiper motor.
3) Remove motor attaching bolts.
Tightening torque:
5.9±1.5 N⋅m (0.6±0.15 kg-m, 4.3±1.1 ft-lb)
4) Remove wiper link from back side of wiper motor using
a screwdriver inserted into service hole in front panel.
CAUTION:
Do not pry wiper link off forcefully as this may scratch
vehicle body.
5) Remove wiper motor.
6) Separate the driver’s side wiper link from back side of
the passenger’s side wiper sleeve unit.
24
6-2SERVICE PROCEDURE
10. Front Wiper and Washer

G6M0021
7) Remove nuts which secure sleeve unit.
Tightening torque:
5.9±1.5 N⋅m (0.6±0.15 kg-m, 4.3±1.1 ft-lb)
G6M0121
8) Remove wiper link from service hole in front panel.
B6M0109A
4. WASHER TANK AND WASHER MOTOR
1) Remove washer tank attaching bolts.
2) Disconnect connectors of washer motors.
3) Disconnect washer hoses from each washer motor.
4) Remove washer tank and washer motor as an unit.
5) Separate washer motor from washer tank.
B6M0110A
5. NOZZLE
1) Disconnect washer hose from nozzle.
2) Push nozzle clip in direction A as shown in figure.
3) Remove nozzle from engine hood.
CAUTION:
Do not pry nozzle off forcefully as this may scratch
vehicle body.
6. COMBINATION SWITCH
Refer to 6-2 [W4B3] as for removal and installation of com-
bination switch.
25
6-2SERVICE PROCEDURE
10. Front Wiper and Washer

B6M0119
B: INSPECTION
1. DEFOGGER SWITCH
Move rear window defogger switch to each position and
check continuity between terminals as indicated in table
below:
Terminal
Switch position35 14 2
OFF

ON
G6M0112
2. DEFOGGER RELAY
Check continuity between terminals as indicated in table
below, when connecting the battery to terminal No. 1 and
No. 3.
When current flows.Between terminals
No. 2 and No. 4Continuity exists.
When current does not flow.Between terminals
No. 2 and No. 4Continuity does not
exist.
Between terminals
No. 1 and No. 3Continuity exists.
G6M0135
3. HEAT WIRES
1) Start the engine so that battery is being charged.
2) Turn defogger switch to ON.
3) Check each heat wire at its center position for discon-
tinuity by setting direct current voltmeter.
Normal indication is about 6 volts.
G6M0136
NOTE:
When measuring voltage, wind a piece of tin foil around the
tip of the tester probe and press the foil against the wire
with your finger.
32
6-2SERVICE PROCEDURE
12. Rear Window Defogger