2003 SUBARU LEGACY cooling

11
Maintenance and service
Maintenance schedule11-3
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Maintenance precautions 11-3
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Engine hood 11-5
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Engine compartment overview 11-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine oil 11-9
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Cooling system 11-14
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Engine coolant 11-15
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Air cleaner element 11-18
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Spark plugs 11-21
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Drive belts 11-22
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Manual transmission oil 11-23
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Automatic transmission fluid 11-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front differential gear oil (AT vehicles) 11-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear differential gear oil 11-27
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Power steering fluid 11-29
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Brake fluid 11-30
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Clutch fluid (MT vehicles) 11-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake booster 11-33
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Brake pedal 11-34
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Clutch pedal (Manual transmission vehicles) 11-35 . . . . . . . . . . . . . . . . . . .
Replacement of brake pad and lining 11-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking brake stroke 11-37
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Tires and wheels 11-38
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Types of tires 11-38
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Tire inspection 11-39
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Tire pressures and wear 11-39
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Wheel balance 11-42
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Wear indicators 11-43
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Tire rotation 11-44
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Tire replacement 11-44
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Wheel replacement 11-45
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Wheel covers 11-46
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Aluminum wheels (if equipped) 11-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield washer fluid 11-47
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Replacement of windshield wiper blades 11-48 . . . . . . . . . . . . . . . . . . . . . . . .

11-4
Always use the proper tools and make certain that they are
well maintained. Never get under the vehicle supported only by a jack. Always
use a safety stands to support the vehicle. Never keep the engine running in a poorly ventilated area,
such as a garage or other closed areas. Do not smoke or allow open flames around the fuel or battery.
This will cause a fire. Because the fuel system is under pressure, replacement of the
fuel filter should be performed only by your SUBARU dealer. Wear adequate eye protection to guard against getting oil or
fluids in your eyes. If something does get in your eyes, thorough-
ly wash them out with clean water. Do not tamper with the wiring of the SRS airbag system or
seatbelt pretensioner system, or attempt to take its connectorsapart, as that may activate the system or it can render it inopera-tive. The wiring and connectors of these systems are yellow for
easy identification. NEVER use a circuit tester for these wiring. If your SRS airbag or seatbelt pretensioner needs service, con-
sult your nearest SUBARU dealer. Before checking or servicing in the engine compart- ment
Always stop the engine and set the parking brake firmly to pre-
vent the vehicle from moving. Always let the engine cool down. Engine parts become very
hot when the engine is running and remain hot for some time af-ter the engine is stopped. Do not spill engine oil, engine coolant, brake fluid or any other
fluid on hot engine components. This may cause a fire. Always remove the key from the ignition switch. When the
ignition switch is in the “ON” position, the cooling fan may oper-
ate suddenly even when the engine is stopped.

11
Maintenance and service11-5
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CONTINUED –

When you do checking or servicing in the engine
compartment while the engine is running
A running engine can be dangerous. Keep your fingers, hands, clothing, hair and tools away from the cooling fan, belts and anyother moving engine parts. Removing rings, watches and ties isadvisable.
Engine hood
WARNING
Always check that the hood is properly locked before you start
driving. If it is not, it might fly open while the vehicle is moving
and block your view, which may cause an accident and serious
bodily injury.
HBB002BA
HBB001BA

11-14
Recommended grade and viscosity under severe driving conditions
If the vehicle is used in desert areas, in areas with very high tempera-
tures, or used for heavy-duty applications such as towing a trailer, use
of oil with the following grade and viscosities is recommended.
API classification SL (or SJ): SAE viscosity No.: 30, 40, 10W-50,
20W-40, 20W-50
Cooling system
WARNING
Never attempt to remove the radiator cap until the engine has
been shut off and has cooled down completely. Since the coolantis under pressure, you may suffer serious burns from a spray ofboiling hot coolant when the cap is removed.
CAUTION
The cooling system has been filled at the factory with a high
quality, corrosion-inhibiting, year-around coolant which providesprotection against freezing down to –33F ( –36 C). For adding,
use genuine SUBARU coolant or an equivalent: a mixture of 50%
soft water and 50% ethylene-glycol basis coolant. Use of improp-er coolants may result in corrosion in the cooling system. It is im-portant to maintain protection against freezing and corrosion,even if freezing temperatures are not expected. Never mix differ-ent kinds of coolant. Do not splash the engine coolant over painted parts. The alco-
hol contained in the engine coolant may damage the paint sur-face.
Hose and connections
Your vehicle employs an electric cooling fan which is thermostatically

11
Maintenance and service11-15
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CONTINUED –
controlled to operate when the engine coolant reaches a specific tem-
perature.If the radiator cooling fan does not operate even when the engine
coolant temperature gauge exceeds the normal operating range, the
cooling fan circuit may be defective. Check the fuse and replace it if
necessary. If the fuse is not blown, have the cooling system checked
by your SUBARU dealer.
If frequent addition of coolant is necessary, there may be a leak in the
engine cooling system. It is recommended that the cooling systemand connections be checked for leaks, damage, or looseness.
Engine coolant Checking the coolant level
Check the coolant level at each fuel stop.
HBB004FB
1. Check the coolant level on the outside of the reservoir while the
engine is cool.
2. If the level is close to or lower than the “LOW” level mark, add
coolant up to the “FULL” level mark. If the reserve tank is empty, re-
move the radiator cap and refill as required.

12-10Fuse panel Circuit
Fuse rating
2020AMcIntosh audio amp (if equipped)
2120AAccessory power socket
Seat heater
Fuse panel located in the engine compartment 2.5 liter models
HBC003BC
FWD socket
(without SPORTSHIFT mode)
Fuse panel
Fuse ratingCircuit
120A Radiator cooling fan (Main)
220ARadiator cooling fan (Sub)
350AABS motor
420ARear window defogger
515AHazard warning flasher
Horn
615AMeter
SRS airbag system warning light

12-12
3.0 liter models
HBC004BC
Fuse panelFuse ratingCircuit
130ARadiator cooling fan (Main)
230ARadiator cooling fan (Sub)
350AABS (VDC) motor
430AMcIntosh audio amp (if equipped)
520ARear window defogger
615AHazard warning flasher
Horn
715AMeter
SRS airbag system warning light
810AAutomatic transmission control unit
ABS UNIT
910AAlternator
1015AHeadlight (right side)

14
Index14-3
Charge warning light
3-13
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CHECK ENGINE warning light/Malfunction indicator lamp 3-12 . . . . . . . . . . .
Child restraint systems 1-33
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Child safety locks 2-20
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Cigarette lighter socket (if equipped) 6-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning aluminum wheels 10-4
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Cleaning fog light lens (for OUTBACK) 10-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning the interior 10-6
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Clock 3-19
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Clutch fluid (MT vehicles) 11-32
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Clutch pedal (Manual transmission vehicles) 11-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coin compartment 6-7
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Convenience hook 6-20
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Convenient tie-down hooks (if equipped) 6-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling system 11-14
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Corrosion protection 10-5
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Cruise control (if equipped) 7-44
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Cup holder 6-8
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D Daytime running light system 3-21
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Dimensions 12-2
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Disc brake pad wear warning indicators 7-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dome light 6-2
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Door locks 2-3
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Door open warning lights 3-17
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Drive belts 11-22
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Driving in foreign countries 8-5
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Driving tips for AWD vehicles 8-6
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Dual moonroofs (Station wagon) 2-32
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E
Electrical system 12-3
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Emergency Locking Retractor (ELR) 1-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine 12-3
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Engine compartment overview 11-7
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