engine SUBARU LEGACY 2006 4.G Manual Online

11
Maintenance and service
Maintenance schedule ....................................... 11-3
Maintenance precautions .................................. 11-3 Before checking or servicing in the engine compartment ........................................................ 11-4
When you do checking or servicing in the engine
compartment while the engine is running ......... 11-4
Engine hood ....................................................... 11-4
Engine compartment overview ......................... 11-6 2.5-liter non-turbo models ..................................... 11-6
2.5-liter turbo models ............................................. 11-7
3.0-liter models ....................................................... 11-8
Engine oil ............................................................ 11-9 Checking the oil level ............................................. 11-9
Changing the oil and oil filter ................................ 11-10
Recommended grade and viscosity ..................... 11-12
Recommended grade and viscosity under severe driving conditions ................................................ 11-13
Cooling system .................................................. 11-13 Hose and connections ........................................... 11-14
Engine coolant ........................................................ 11-14
Air cleaner element ............................................ 11-17 Replacing the air cleaner element ......................... 11-17
Spark plugs ......................................................... 11-19 Recommended spark plugs ................................... 11-19
Drive belts ........................................................... 11-20 2.5-liter models ....................................................... 11-20
3.0-liter models ....................................................... 11-20
Manual transmission oil .................................... 11-20 Checking the oil level ............................................. 11-20
Recommended grade and viscosity ..................... 11-21
Automatic transmission flui d ............................ 11-22
Checking the fluid level .......................................... 11-22
Recommended fluid ............................................... 11-23
Front differential gear oil (AT vehicles) ............ 11-23 Checking the oil level ............................................. 11-23
Recommended grade and viscosity ..................... 11-24
Rear differential gear oil .................................... 11-24 Checking the gear oil level .................................... 11-24
Recommended grade and viscosity ..................... 11-26
Power steering fluid ........................................... 11-27 Checking the fluid level .......................................... 11-27
Recommended fluid ............................................... 11-27
Brake fluid ........................................................... 11-28 Checking the fluid level .......................................... 11-28
Recommended brake fluid ..................................... 11-28
Clutch fluid (MT vehicles) .................................. 11-29 Checking the fluid level .......................................... 11-29
Recommended clutch fluid .................................... 11-29
Brake booster ..................................................... 11-30
Brake pedal ......................................................... 11-30 Checking the brake pedal free play ...................... 11-30
Checking the brake pedal reserve distance ......... 11-30
Clutch pedal (Man ual transmission
vehicles) ........................................................... 11-31 Checking the clutch function ................................ 11-31
Checking the clutch pedal free play ..................... 11-31

Maintenance and service 11 - 3
– CONTINUED –
Maintenance and serviceMaintenance schedule
The scheduled maintenance items re-
quired to be serviced at regular intervals
are shown in the “Warranty and Mainte-
nance Booklet”.
For details of your maintenance schedule,
read the separate “Warranty and Mainte-
nance Booklet”.Maintenance precautions
When maintenance and service are re-
quired, it is recommended that all work be
done by an authorized SUBARU dealer.
If you perform maintenance and service
by yourself, you should familiarize your-
self with the information provided in this
section on general maintenance and ser-
vice for your SUBARU.
Incorrect or incomplete service could
cause improper or unsafe vehicle opera-
tion. Any problems caused by improper
maintenance and service performed by
you are not eligible for warranty coverage.
yTesting of an All-Wheel Drive ve-
hicle must NEVER be performed
on a single two-wheel dynamome-ter or similar apparatus. Attempt-
ing to do so will result in transmis-
sion damage and in uncontrolled
vehicle movement and may cause
an accident or injuries to persons
nearby.
y Always select a safe area when
performing maintenance on yourvehicle.
yAlways be very careful to avoid in-
jury when working on the vehicle.
Remember that some of the mate-
rials in the vehicle may be hazard-
ous if improperly used or handled,
for example, battery acid.
yYour vehicle should only be ser-
viced by persons fully competent
to do so. Serious personal injury
may result to persons not experi-
enced in servicing vehicles.
yAlways use the proper tools and
make certain that they are well
maintained.
yNever get under the vehicle sup-
ported only by a jack. Always use
a safety stands to support the ve- hicle.
yNever keep the engine running in
a poorly ventilated area, such as a
garage or other closed areas.
yDo not smoke or allow open
flames around the fuel or battery.
This will cause a fire.
yBecause the fuel system is under
pressure, replacement of the fuel
filter should be performed only by
your SUBARU dealer.

11 - 4 Maintenance and service
„Before checking or servicing
in the engine compartment
„When you do checking or ser-
vicing in the engine compart-
ment while the engine is run-ning
Engine hood
To open the hood:
1. If the wiper blades are lifted off the
windshield, return them to their original
positions.
2. Pull the hood release knob under the
instrument panel.yWear 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.
yDo not tamper wi th the wiring of
the SRS airbag system or seatbelt
pretensioner system, or attempt
to take its connectors apart, as
that may activate the system or it
can render it inoperative. The wir-
ing and connectors of these sys-
tems are yellow for easy identifi-
cation. NEVER use a circuit tester
for these wiring.
If your SRS airbag or seatbelt pre-
tensioner needs service, consult
your nearest SUBARU dealer.
y Always stop the engine and set
the parking brake firmly to pre-
vent the vehicle from moving.
yAlways let the engine cool down.
Engine parts b ecome very hot
when the engine is running and
remain hot for some time after the
engine is stopped.
y Do not spill engine oil, engine
coolant, brake fluid or any other
fluid on hot engine components.
This may cause a fire.
yAlways remove the key from the
ignition switch. When the ignition
switch is in the “ON” position, the
cooling fan may operate suddenly
even when the engine is stopped.
A running engine can be dangerous.
Keep your fingers, hands, clothing,
hair and tools away from the cooling
fan, belts and any other moving en-
gine parts. Removing rings, watch-
es and ties is advisable.
B00099

11 - 6 Maintenance and service
Engine compartment overview „2.5-liter non-turbo models
12 3 45 6
7
8
9
10
11
13 12
B00414
1) Power steering fluid reservoir (page
11-27)
2) Manual transmission oil level gauge
(MT) (page 11-20) or Differential gear
oil level gauge (AT) (page 11-23)
3) Clutch fluid reservoir (page 11-29)
4) Automatic transmi ssion fluid level
gauge (page 11-22)
5) Brake fluid reservoir (page 11-28)
6) Fuse box (page 11-45)
7) Battery (page 11-44)
8) Windshield washer tank (page 11-39)
9) Engine oil filler cap (page 11-9)
10) Engine coolant reservoir (page 11- 14)
11) Radiator cap (page 11-14)
12) Engine oil level gauge (page 11-9)
13) Air cleaner element (page 11-17)

Maintenance and service 11 - 7
– CONTINUED –
„2.5-liter turbo models
12 4 6
35
13 12 11 10 9 8 7
B00416
1) Power steering fluid reservoir (page 11-27)
2) Manual transmission oil level gauge
(MT) (page 11-20) or Differential gear
oil level gauge (AT) (page 11-23)
3) Clutch fluid reservoir (page 11-29)
4) Brake fluid reservoir (page 11-28)
5) Automatic transmission fluid level gauge (page 11-22)
6) Fuse box (page 11-45)
7) Battery (page 11-44)
8) Windshield washer tank (page 11-39)
9) Engine oil filler cap (page 11-9)
10) Engine coolant reservoir (page 11- 14)
11) Engine oil level gauge (page 11-9)
12) Radiator cap (page 11-14)
13) Air cleaner element (page 11-17)

11 - 8 Maintenance and service
„ 3.0-liter models
B00502
12 3 45
12 10
11 9 8 76
1) Power steering fluid reservoir (page
11-27)
2) Differential gear oil level gauge (AT)
(page 11-23)
3) Automatic transmi ssion fluid level
gauge (page 11-22)
4) Brake fluid reservoir (page 11-28)
5) Fuse box (page 11-45)
6) Battery (page 11-44)
7) Windshield washer tank (page 11-39)
8) Engine oil filler cap (page 11-9)
9) Engine coolant reservoir (page 11-
14)
10) Radiator cap (page 11-14)
11) Engine oil level gauge (page 11-9)
12) Air cleaner element (page 11-17)

Maintenance and service 11 - 9
– CONTINUED –
Engine oil „Checking the oil level
Check the engine oil level at each fuel stop.
1. Park the vehicle on a level surface and
stop the engine.
2. Pull out the dipstick, wipe it clean, and
insert it again.
3. Be sure the dipstick is correctly insert-
ed until it stops with the graphic symbol
“ ” on its top appearing as shown inthe illustration. 2.5-liter models
1) Notch
2) Upper level
3) Lower level
3.0-liter models
1) Upper level
2) Lower level
4. Pull out the dipstick again and check
the oil level on it. If it is below the lower
level, add oil to bring the level up to the up-
per level.
B00104
1 2
3
B00418
y Use only engine oil with the rec-
ommended grade and viscosity.
y Be careful not to spill engine oil
when adding it. If oil touches the
exhaust pipe, it may cause a bad
smell, smoke, and/or a fire. If en-
gine oil gets on the exhaust pipe,
be sure to wipe it off.
1
2
B00417

11 - 1 0 Maintenance and service
If you check the oil level just after stopping
the engine, wait a few minutes for the oil to
drain back into the oil pan before checking
the level.
To prevent overfilling the engine oil, do not
add any additional oil above the upper lev-
el when the engine is cold.
In 2.5-liter-engine models, the dipstick has
a notch above the upper level.
Just after driving or while the engine is
warm, the engine oil level reading may be
in a range between the upper level and
the notch mark. This is caused by thermal
expansion of the engine oil. „Changing the oil and oil filter
Change the oil and oil filter according to
the maintenance schedule in the “Warran-
ty and Maintenance Booklet”.
The engine oil and oil filter must be
changed more frequently than listed in the
maintenance schedule when driving on
dusty roads, when short trips are frequent-
ly made, or when driving in extremely cold
whether.
1. Warm up the engine by letting the en-
gine idle for approximately 10 minutes to
ease draining the engine oil.
2. Park the vehicle on a level surface and
stop the engine. 3. Remove the oil filler cap.
2.5-liter models
3.0-liter models
4. Drain out the engine oil by removing the drain plug while the engine is still
warm. The used oil should be drained into
an appropriate container and disposed of
properly.
5. Wipe the seating surface of the drain
plug with a clean cloth and tighten it se-
curely with a new sealing washer after the
oil has completely drained out.
2.5-liter models
B00419
B00305
Be careful not to burn yourself with
hot engine oil.
B00420

Maintenance and service 11 - 11
– CONTINUED –
3.0-liter models
6. Open the access cover by removing
the clips and turning the access cover
counterclockwise. The oil filter will be ex-
posed. 2.5-liter models
3.0-liter models
7. Remove the oil filt er with an oil filter
wrench. 8. Before installing a new oil filter, apply a
thin coat of engine oil to the seal.
9. Clean the rubber seal seating area of
the bottom of engine an
d install the oil fil-
ter by hand turning. Be careful not to twist
or damage the seal.
10.Tighten the oil filter by the amount indi-
cated in the following table after the seal
makes contact with the bottom of engine.
11.Reinstall the cover under the oil filter.
12.Pour engine oil through the filler neck.
B00306B00421
B00307
Model Oil filter colorPart num-
ber Amount of
rotation
2.5-liter models Black
15208AA100
1 rotation
White 15208AA09A
2/3 – 3/4
rotation
3.0-liter models Black
15208AA031
3/4
rotation
y Never over tighten the oil filter be-
cause that can result in an oil leak.
y Thoroughly wipe off any engine
oil that has spilled over the ex-
haust pipe and/or under-cover. If
left unremoved, the oil could
catch fire.

11 - 1 2 Maintenance and service
Oil capacity (Guideline):
2.5-liter models: 4.2 US qt (4.0 liters, 3.5 Imp qt)
3.0-liter models: 5.8 US qt (5.5 liters, 4.8
Imp qt)
The oil quantity indicated above is only a
guideline. The necessary quantity of oil
depends on the quantity of oil that has
been drained. The quantity of drained oil
differs slightly depen ding on the tempera-
ture of the oil and the time the oil is left
flowing out. After refilling the engine with
oil, therefore, you must use the dipstick to
confirm that the level is correct.
13.Start the engine and make sure that no
oil leaks appear around the filter’s rubber
seal and drain plug.
14.Run the engine until it reaches the nor-
mal operating temperature. Then stop the
engine and wait a few minutes to allow the
oil drain back. Check the oil level again
and if necessary, add more engine oil. „ Recommended grade and
viscosity
Oil grade:
ILSAC GF-4, which can be identified
with the ILSAC certification mark
(Starburst mark)
or API classification SM with the
words “ENERGY CONSERVING”
These recommended oil grades can be
identified by looking for either or both of
the following marks displayed on the oil
container.
ILSAC Certification Mark (Starburst Mark) API Service label
1) Indicates the oil quality by API designa-
tions
2) Indicates the SAE oil viscosity grade
3) Indicates that the oil has fuel saving ca- pabilities
In choosing an oil, you want the proper
quality and viscosity, as well as one that
will add to fuel economy. The following ta-
ble lists the recommended viscosities and
applicable temperatures.
When adding oil, different brands may be
used together as long as they are the same API classifica tion and SAE viscosity
as those recommended by SUBARU.
Use only engine oil with the recom-
mended grade and viscosity.
B00014
APISERVICESM
ENERGYCONSERVING
SAE
5W-30
1
2
3
B00446