check engine SUBARU LEGACY 2006 4.G Owner's Guide

9-16 In case of emergency
each of the jack-up reinforcements.
„Using a flat-bed truck
This is the best way to transport your vehi-
cle. Use the following procedures to en-
sure safe transportation.
1. Shift the selector lever into the “P” po-
sition for automatic transmission vehicles
or “1st” for manual transmission vehicles. 2. Pull up the parking brake lever firmly.
3. Secure the vehicle onto the carrier
properly with safety chains. Each safety
chain should be equally tightened and
care must be taken not to pull the chains
so tightly that the suspension bottoms out. „
Towing with all wheels on the ground
1. Check the transmission and differential
oil levels and add oil to bring it to the upper
level if necessary.
2. Release the parking brake and put the
transmission in neutral.
Use the rear tie-down hooks only for
downward anchoring. If they are
used to anchor the vehicle in any
other direction, cables may slip off
the hooks, possibly causing a dan-
gerous situation.
900033
yNever turn the ignition switch to
the “LOCK” position while the ve-
hicle is being towed because the
steering wheel and the direction
of the wheels will be locked.
900254
yRemember that the brake booster
and power steering do not func-
tion when the engine is not run-
ning. Because the engine is
turned off, it will take greater ef-
fort to operate the brake pedal and
steering wheel.
y If transmission failure occurs,
transport your vehicle on a flat-
bed truck.
y Do not run the engine while being
towed using this method. Trans-
mission damage could result if
the vehicle is towed with the en-
gine running.
y For vehicles with automatic trans-
mission, the traveling speed must
be limited to less than 20 mph (30
km/h) and the traveling distance
to less than 31 miles (50 km). For
greater speeds and distances,
transport your vehicle on a flat-
bed truck.

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

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

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

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

11 - 1 4 Maintenance and service
„Hose and connections
Your vehicle employs an electric cooling
fan which is thermostatically controlled to
operate when the engine coolant reaches
a specific temperature.
If the radiator coolin g fan does not operate
even when the engine coolant tempera-
ture gauge exceeds the normal operating
range, the cooling fan circuit may be de-
fective. Check the fuse and replace it if
necessary. If the fuse is not blown, havethe cooling system checked by your
SUBARU dealer.
If frequent addition of coolant is neces-
sary, there may be a leak in the engine
cooling system. It is recommended that
the cooling system and connections be
checked for leaks, damage, or looseness. „
Engine coolant
T Checking the coolant level
Check the coolant level at each fuel stop.
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, remove the radiator cap and refill
as required. 3. After refilling the reserve tank and the
radiator, reinstall the caps and check that
the rubber gaskets inside the radiator cap
are in the proper position.
y
Do not splash the engine coolant
over painted parts. The alcohol
contained in the engine coolant
may damage the paint surface.
FULL LOW
600151
yBe careful not to spill engine cool-
ant when adding it. If coolant
touches the exhaust pipe, it may
cause a bad smell, smoke, and/or
a fire. If engine co olant gets on the
exhaust pipe, be sure to wipe it off.
y Do not splash the engine coolant
over painted parts. The alcohol
contained in the engine coolant
may damage the paint surface.
B00018

11 - 2 0 Maintenance and service
Drive belts
The alternator, power steering pump, and
air conditioner compressor depend on
drive belts. Satisfactory performance re-
quires that belt tension be correct. „2.5-liter models
1) Power steering pump pulley
2) Air conditioner compressor pulley
3) Crank pulley in (mm)
To check belt tensi on, place a straight-
edge (ruler) across two adjacent pulleys
and apply a force of 22 lbs (98 N, 10 kg)
midway between the pulleys by using a
spring scale. Belt deflection should be the
amount specified. „ 3.0-liter models
It is unnecessary to check belt tension pe-
riodically because your engine is
equipped with an autom atic belt tension
adjuster. However, replacement of the
belt should be done according to the
maintenance schedule in the “Warranty
and Maintenance Booklet”. Consult your
SUBARU dealer for replacement.
If a belt is loose, cr acked, or worn, contact
your SUBARU dealer.Manual transmission oil „ Checking the oil level
Non-turbo models
1) Yellow handle
A
B
2
3
1
B00365
Deflection
New belt Used belt
A 0.28 – 0.35
(7.0 – 9.0) 0.35 – 0.43
(9.0 – 11.0)
B 0.30 – 0.33
(7.5 – 8.5) 0.35 – 0.40
(9.0 – 10.0)
1
B00427

Maintenance and service 11 - 2 1
Turbo models
1. Park the vehicle on a level surface and
stop the engine.
2. Pull out the dipstick, wipe it clean, and
insert it again. 1) Upper level
2) Lower level
3. Pull out the dipstick again and check
the oil level on it. If it is below the lower
level, add oil through the dipstick hole to
bring the level up to the upper level.
„ Recommended grade and
viscosity
Each oil manufacturer has its own base
oils and additives. Never use different
brands together.
Oil grade:
API classification GL-5
SAE viscosity No. and applicable tem- perature
B00196
Be careful not to spill manual trans-
mission oil when adding it. If oil
touches the exhaus t pipe, it may
cause a bad smell, smoke, and/or a
fire. If oil gets on the exhaust pipe,
be sure to wipe it off.
L F
F
L1
2 1
2
B00368-30 -20 -10 0 10 20 30 40-20 0 60 20
80W 75W/90 80 100
40
85W 90
B00032

11 - 2 2 Maintenance and service
Automatic transmission fluid „Checking the fluid level
The automatic transmission fluid expands
largely as its temperature rises; the fluid
level differs according to fluid tempera-
ture. Therefore, there are two different
scales for checking the level of hot fluid
and cold fluid on the dipstick.
Though the fluid level can be checked
without warming up the fluid on the
“COLD” range, we recommend checking
the fluid level when the fluid is at operating
temperature. T Checking the fluid level when the
fluid is hot
Check the fluid level monthly.
1. Drive the vehicle se veral miles to raise
the temperature of the transmission fluid
up to normal operating temperature; 158 to 176 °F (70 to 80 °C) is normal.
2. Park the vehicle on a level surface and
set the parking brake.
3. First shift the selector lever in each po-
sition. Then shift it in the “P” position, and
run the engine at idling speed. 4-speed automatic transmission
1) Yellow handle
5-speed automatic transmission
1) Yellow handle1) HOT range
2) COLD range
3) Upper level
4) Lower level
4. Pull out the dipstick and check the fluid
level on the gauge. If it is below the lower
level on the “HOT” range, add the recom-
mended automatic transmission fluid up to
the upper level. T Checking the fluid level when the
fluid is cold
When the fluid level has to be checked
without time to warm up the automatic
transmission, check to see that the fluid
level is between the lower level and upper
level on the “COLD” range. If it is below
that range, add fluid up to the upper level.
Be careful not to overfill.1
B00428
1
B00429
3 4
3 4 2
1
B00370