2004 SUBARU LEGACY air filter

4-21
Climate control
– CONTINUED –
Air filtration system (if equipped)
If your vehicle’s air conditioning system is equipped
with a optional air filtration system, replace the filter el-
ement according to the replacement schedule shown
below. This schedule should be followed to maintain
the filter’s dust collection ability. Under extremely
dusty conditions, the filter should be replaced more
frequently. Since the filter element is a viscous type, it
is unnecessary to clean or wash the element. Have
your filter checked or replaced by your SUBARU deal- er.
Replacement schedule:
Every 12 months or 9,300 miles (15,000 km) whichev-
er comes first
NOTE
The filter can influence the air conditioning, heat-
ing and defroster performance if not properly
maintained.

11 - 1
11
Maintenance and service
Ma inte nan ce sche du le .. ... ... ... .. ... ... ... ... .. ... ... 11-3
Ma in te nan ce precau tio ns ... ... .. ... ... ... ... .. ... ... 11-3
B ef ore checki ng o r servicing in th e e ngi ne
c o m part ment ..... ..................... ..................... ... 11-4
W hen y ou do c h ecking or servic ing in t h e
e ngi ne c omp artme nt while the engi ne is
r u nn ing ............... ..................... ..................... ... 11-5
En gine ho od .. ... ... ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... 11-5
Engine compartment overview ................... 11-8 2.5 liter models .................................................. 11-8
2.5 liter CALIFORNIA spec models ................. 11-9
3.0 liter models .................................................. 11-10
Engine oil ...................................................... 11-11 Checking the oil level ....................................... 11-11
Changing the oil and oil filter .......................... 11-12
Recommended grade and viscosity ................ 11-15
Recommended grade and viscosity under severe driving conditions .............................. 11-16
Cooling system ............................................. 11-17 Hose and connections ...................................... 11-18
Engine coolant .................................................. 11-18
Air cleaner element ...................................... 11-22 Replacing the air cleaner element ................... 11-22
Spark plugs ................................................... 11-25 Recommended spark plugs ............................. 11-25
Drive belts ..................................................... 11-26 2.5 liter models .................................................. 11-26
3.0 liter models .................................................. 11-26
Manual transmission oil ............................... 11-27 Checking the oil level ....................................... 11-27 Recommended grade and viscosity ............... 11-27
Automatic transmission fluid ...................... 11-28 Checking the fluid level .................................... 11-28
Recommended fluid ......................................... 11-30
Front differential gear oil (AT vehicles) ...... 11-30 Checking the oil level ....................................... 11-30
Recommended grade and viscosity ............... 11-31
Rear differential gear oil ............................... 11-32 Checking the gear oil level .............................. 11-32
Recommended grade and viscosity ............... 11-34
Power steering fluid ...................................... 11-35 Checking the fluid level .................................... 11-35
Recommended fluid ......................................... 11-36
Brake fluid ..................................................... 11-36 Checking the fluid level .................................... 11-36
Recommended brake fluid ............................... 11-37
Clutch fluid (MT vehicles) ............................ 11-38 Checking the fluid level .................................... 11-38
Recommended clutch fluid .............................. 11-38
Brake booster ................................................ 11-39
Brake pedal .................................................... 11-39 Checking the brake pedal free play ................ 11-39
Checking the brake pedal reserve distance ... 11-40
Clutch pedal (Manual transmission vehicles) ............... 11-40Checking the clutch function .......................... 11-40
Checking the clutch pedal free play ............... 11-41
Replacement of brake pad and lining ......... 11-41 Breaking-in of new brake pads and linings .... 11-42

11 - 4
2Maintenance and service
the materials in the vehicle may be hazardous if
improperly used or handled, for example, bat-tery acid. y
Your vehicle should only be serviced by per-
sons fully competent to do so. Serious person-
al injury may result to persons not experienced
in servicing vehicles. y Always use the proper tools and make certain
that they are well maintained. y Never get under the vehicle supported only
by a jack. Always use a safety stands to sup-
port the vehicle. y Never keep the engine running in a poorly
ventilated area, such as a garage or other
closed areas. y Do not smoke or allow open flames around
the fuel or battery. This will cause a fire. y Because the fuel system is under pressure,
replacement of the fuel filter should be per-
formed only by your SUBARU dealer.y Wear adequate eye protection to guard
against getting oil or fluids in your eyes. If
something does get in your eyes, thoroughly
wash them out with clean water. y Do not tamper with the wiring of the SRS air-
bag system or seatbelt pretensioner system, or
attempt to take its connectors apart, as that may activate the system or it can render it inop-
erative. The wiring and connectors of these
systems are yellow for easy identification. NEV-
ER use a circuit tester for these wiring.
If your SRS airbag or seatbelt pretensioner
needs service, consult your nearest SUBARU
dealer.
„ Before checking or servicing in the en-
gine compartment
yAlways stop the engine and set the parking
brake firmly to prevent the vehicle from mov-
ing. y Always let the engine cool down. Engine
parts become very hot when the engine is run-
ning and remain hot for some time after the en-
gine is stopped.y Do not spill engine oil, engine coolant, brake
fluid or any other fluid on hot engine compo-
nents. This may cause a fire.y Always remove the key from the ignition
switch. When the ignition switch is in the “ON”
position, the cooling fan may operate suddenly

11 - 8
2Maintenance and service
Engine compartment overview „
2.5 liter models
12 3 45678
9
10
11
12
13
14
UBB036BB
1) Manual transmission oil level
gauge (MT) (page 11-27) or Dif-
ferential gear oil level gauge
(AT) (page 11-30)
2) Air cleaner element (page 11- 22)
3) Clutch fluid reservoir (page 11-
38)
4) Automatic transmission fluid lev- el gauge (page 11-28)
5) Brake fluid reservoir (page 11- 36)
6) Fuel filter
7) Windshield washer tank (page 11-51)
8) Fuse box (page 11-59)
9) Battery (page 11-58)
10) Engine oil filler cap (page 11-11)
11) Engine coolant reservoir (page
11-18)
12) Radiator cap (page 11-18)
13) Engine oil level gauge (page 11-
11)
14) Power steering fluid reservoir (page 11-35)

11 - 1 0
2Maintenance and service „
3.0 liter models
12 3 45 67
8
9
10
11
12
13
UBB058BB
1) Air cleaner element (page 11-
22)
2) Differential gear oil level gauge (AT) (page 11-30)
3) Automatic transmission fluid lev- el gauge (page 11-28)
4) Brake fluid reservoir (page 11-
36)
5) Fuel filter
6) Windshield washer tank (page
11-51)
7) Fuse box (page 11-59)
8) Battery (page 11-58)
9) Engine oil filler cap (page 11-11)
10) Engine coolant reservoir (page 11-18)
11) Engine oil level gauge (page 11- 11)
12) Radiator cap (page 11-18)
13) Power steering fluid reservoir (page 11-35)

11 - 2 2
2Maintenance and service
1) Rubber gaskets
6. Put the radiator cap back on and tighten firmly. At
this time, make sure that the rubber gasket in the radi-
ator cap is correctly in place.
7. Start and run the engine for more than five minutes
at 2,000 to 3,000 rpm.
8. Stop the engine and wait until the coolant cools
down (122 to 140 °F [50 to 60 °C]). If there is any loss
of coolant, add coolant to the radiator’s filler neck and
to the reserve tank’s “FULL” level.
9. Put the radiator cap and reservoir cap back on and
tighten firmly.
Air cleaner element
Do not operate the engine with the air cleaner
element removed. The air cleaner element not
only filters intake air but also stops flames if the
engine backfires. If the air cleaner element is
not installed when the engine backfires, you
could be burned.
The air cleaner element functions as a filter screen.
When the element is perforated or removed, engine
wear will be excessive and engine life shortened.
The air cleaner element is a viscous type. It is unnec-
essary to clean or wash the element. „ Replacing the air cleaner element
Replace the air cleaner element according to the
maintenance schedule in the “Warranty and Mainte-
nance Booklet”. Under extremely dusty conditions, re-
place it more frequently. It is recommended that you
always use genuine SUBARU parts.
1
HSB026BB

14-6
Index
Manual heating and air conditioning system
...4-5
Manual transmission .................................................. 7-12
Manual transmission oil ............................................ 11-27
Map light ................................................................ 6-3, 11-76
Maximum load limits .................................................. 8-29
Meters and gauges ..................................................... 3-7
Mirrors .............................................................................. 3-31
Moonroof .............................................................. 2-32, 9-29
N
New vehicle break-in driving – the first 1,000 miles (1,600 km) .......................8-2
O
Odometer/Trip meter ................................................. 3-7
Off road driving ............................................................. 8-8
Oil pressure warning light ........................................3-12
Oil filter ............................................................................. 11-12
Oil level Engine ........................................................................ 11-11
Manual transmission ............................................ 11-27
Rear differential ...................................................... 11-32
OnStar®
Personal calling ...................................................... 6-17
Services .................................................................... 6-15
Subscription plans ................................................ 6-15
System ....................................................................... 6-13Limitations
................................................................. 6-18
Virtual advisor .......................................................... 6-17
Outside mirrors .............................................................. 3-33
Overheating engine ..................................................... 9-19
P
Parking Brake stroke ............................................................. 11-43
Light switch ............................................................... 3-23
Power Door locking switches .......................................... 2-5
Steering ...................................................................... 7-30
Steering fluid ............................................................ 11-35
Windows .................................................................... 2-23
Printed antenna ............................................................ 5-2
R
Rear Combination lights ................................................. 11-71
Differential gear oil ................................................. 11-32
Gate ............................................................................. 2-31
Seats ........................................................................... 1-10
Rear seat
Folding down (Wagon) ......................................... 1-14
Rear window Defogger switch ...................................................... 3-28
Wiper and washer switch ....................................3-27