Service SUBARU OUTBACK 2005 4.G User Guide

7-2
Starting and operating
Starting and operatingFuel
Use of a fuel which is low in quality or use of an
inappropriate fuel additive may cause engine
damage.
! Fuel requirements
! 2.5-liter non-turbo models
The 2.5-liter non-turbo engine is designed to operate
using unleaded gasoline with an octane rating of 87
AKI or higher. ! 2.5-liter turbo models and 3.0-liter models
The 2.5-liter turbo engine and 3.0-liter engine are de-
signed to operate using premium unleaded gasoline
with an octane rating of 91 AKI or higher. If premium
unleaded gasoline is not available, regular unleaded
gasoline with an octane rating of 87 AKI or higher may
be temporarily used.
For optimum engine performance and driveability, it is
required (for 2.5-liter turbo models), and recommend-
ed (for 3.0-liter models) that you use premium grade
unleaded gasoline.
NOTE
Be sure to use premium unleaded gasoline of 91
AKI or higher for a 2.5-liter turbo engine model. If
other gasoline (lower than 91 AKI) is used, knock-
ing, reduced output and poor accelerator re-
sponse will result. ! Fuel octane rating
This octane rating is the average of the Research Oc-
tane and Motor Octane numbers and is commonly re-
ferred to as the Anti Knock Index (AKI).
Using a gasoline with a lower octane rating can cause
persistent and heavy knocking, which can damage the
engine. Do not be concerned if your vehicle some-
times knocks lightly when you drive up a hill or when
you accelerate. See your dealer or a qualified service
technician if you use a fuel with the specified octane
rating and your vehicle knocks heavily or persistently. ! Unleaded gasoline
The neck of the fuel filler pipe is designed to accept
only an unleaded gasoline filler nozzle. Under no cir-
cumstances should leaded gasoline be used because
it will damage the emission control system and may
impair driveability and fuel economy. ! California fuel
If your vehicle was certified to California Emission

7-3
Starting and operating
– CONTINUED –
Standards as indicated on the underhood tune-up la-
bel. It is designed to optimize engine and emission
control system performance with gasoline that meets
the clean burning low-sulfur California gasoline speci-
fications. If you live in any other state than California,
your vehicle will operate on gasoline meeting Federal
specifications. Gasoline sold outside California is per-
mitted to have higher sulfur levels, which may affect
the performance of your vehicle’s catalytic converter
and may produce a sulfur exhaust odor or smell. SUB-
ARU recommends that you try a different brand of un-
leaded gasoline having lower sulfur to determine if the
problem is fuel related before returning your vehicle to
an authorized dealer for service. The CHECK EN-
GINE warning light/Malfunction indicator lamp may
also turn on. If this occurs, return to your authorized
SUBARU dealer for diagnosis. If it is determined that
the condition is caused by the type of fuel used, re-
pairs may not be covered by your warranty. !MMT
Some gasoline contains an octane-enhancing additive
called MMT (Methylcyclopentadienyl Manganese Tri-
carbonyl). If you use such fuels, your emission control
system performance may deteriorate and the CHECK
ENGINE warning light/Malfunction indicator lamp may
turn on. If this happens, return to your authorized
SUBARU Dealer for service. If it is determined that the condition is caused by the type of fuel used, repairs
may not be covered by your warranty. !
Gasoline for cleaner air
Do not let fuel spill on the exterior surfaces of
the vehicle. Fuels containing alcohol may
cause paint damage, which is not covered un-
der the SUBARU Limited Warranty.
Your use of gasoline with detergent additives will help
prevent deposits from forming in your engine and fuel
system. This helps keep your engine in tune and your
emission control system working properly, and is a
way of doing your part for cleaner air. If you continu-
ously use a high quality fuel with the proper detergent
and other additives, you should never need to add any
fuel system cleaning agents to your fuel tank.
Many gasolines are now blended with materials called
oxygenates. Use of these fuels can also help keep the
air cleaner. Oxygenated blend fuels, such as MTBE
(Methyl Tertiary Butyl ether) or ethanol (ethyl or grain
alcohol) may be used in your vehicle, but should con-
tain no more than 15% MTBE or 10% ethanol for the
proper operation of your SUBARU.

7-4
Starting and operating
In addition, some gasoline suppliers are now produc-
ing reformulated gasolines, which are designed to re-
duce vehicle emissions. SUBARU approves the use of reformulated gasoline.
If you are not sure what the fuel contains, you should
ask your service station operators if their gasolines
contain detergents and oxygenates and if they have
been reformulated to reduce vehicle emissions.
As additional guidance, only use fuels suited for your
vehicle as explained below. "
Fuel should be unleaded and have an octane rating
no lower than that specified in this manual. " Methanol (methyl or wood alcohol) is sometimes
mixed with unleaded gasoline. Methanol can be used
in your vehicle ONLY if it does not exceed 5% of the
fuel mixture AND if it is accompanied by sufficient
quantities of the proper cosolvents and corrosion in-
hibitors required to prevent damage to the fuel system.
Do not use fuel containing methanol EXCEPT under
these conditions. " If undesirable driveability problems are experienced
and you suspect they may be fuel related, try a differ-
ent brand of gasoline before seeking service at your
SUBARU dealer. " Fuel system damage or driveability problems which
result from the use of improper fuel are not covered under the SUBARU Limited Warranty. !
Fuel filler lid and cap
! Refueling
0
UB7500CA

7-8
Starting and operating
State emission testing (U.S. only)
Testing of an All-Wheel Drive vehicle must
NEVER be performed on a single two-wheel dy-
namometer. Attempting to do so will result in
uncontrolled vehicle movement and may cause
an accident or injuries to persons nearby.
Resultant vehicle damage due to improper test-
ing is not covered under the SUBARU Limited
Warranty and is the responsibility of the state
inspection program or its contractors or licens-
ees.
At state inspection time, remember to tell your in-
spection or service station in advance not to place
your SUBARU AWD vehicle on a two-wheel dyna-
mometer. Otherwise, serious transmission dam-
age will result.
Some states have started using dynamometers in
their state inspection programs in order to meet their obligation under federal law to implement stricter vehi-
cle emission standards to reduce air pollution from ve-
hicles. A dynamometer is a treadmill or roller-like test-
ing device that allows your vehicle’s wheels to turn
while the vehicle remains in one place. Depending on
the severity of a state’s air pollution problems, the
states must adopt either a “basic” or “enhanced” vehi-
cle emission inspection test. Normally, a portion of the
basic emission test consists of an emission inspector
inserting an analyzer probe into the exhaust pipe of an
idling vehicle for a short period of time. States with
more severe air pollution problems are required to
adopt an enhanced vehicle emission test. This test
simulates actual driving conditions on a dynamometer
and permits more accurate measurement of tailpipe
emitted pollution than the basic emission test.
The U.S. Environmental Protection Agency (EPA) and
states using two-wheel dynamometers in their emis-
sion testing programs have
EXEMPTED SUBARU
AWD vehicles from the portion of the testing program
that involves a two-wheel dynamometer.
There are some states that use four-wheel dynamom-
eters in their testing programs. When properly used,
that equipment will not damage an AWD SUBARU ve-
hicle.
Under no circumstances should the rear wheels be

7-9
Starting and operating
– CONTINUED –
jacked off the ground, nor should the driveshaft be dis-
connected for state emission testing.
The EPA has issued regulations for inspecting the On-
Board Diagnostic (OBD) system as part of the state
emissions inspection. The OBD system is designed to
detect engine and transmission problems that might
cause vehicle emissions to exceed allowable limits.
These inspections apply to all 1996 model year and
newer passenger cars and light trucks. About 30
states plus the District of Columbia have implemented
the OBD system inspection. "The inspection of the OBD system consists of a vi-
sual operational check of the “ CHECK ENGINE” warn-
ing light/malfunction indicator lamp (MIL) and an ex-
amination of the OBD system with an electronic scan
tool while the engine is running. " A vehicle passes
the OBD system inspection if
proper the “ CHECK ENGINE ” warning light/MIL illumi-
nation is observed, there is no stored diagnostic trou-
ble codes, and the OBD system readiness monitors
are complete. " A vehicle fails
the OBD inspection if the “ CHECK
ENGINE ” warning light/MIL is not properly operating
or there is one or more diagnostic trouble codes stored
in vehicle’s computer with the “ CHECK ENGINE”
warning light/MIL illuminated. "
A state emission inspection may reject (not pass or
fail) a vehicle if the number of OBD system readiness monitors “ Not Ready ” is greater than three. Under this
condition, the vehicle operator should be instructed to
drive his/her vehicle for a few days to set the monitors
and return for an emission re-inspection. " Owners of rejected or failing vehicles should contact
their SUBARU Dealer for service.

8-6
Driving tips
"
Keep your engine tuned-up. If you feel the engine
running rough (misfiring, backfiring or incomplete
combustion), have your vehicle checked and repaired
by an authorized SUBARU dealer. " Do not apply undercoating or rust prevention treat-
ment to the heat shield of catalytic converter and the exhaust system.Periodic inspections
To keep your vehicle in the best condition at all times,
always have the recommended maintenance services
listed in the maintenance schedule in the “Warranty
and Maintenance Booklet” performed at the specified
time or mileage intervals.

8-40
Driving tips
and in “GAS STATION REFERENCE” at the end of
this manual. Adjust the rear tire pressure to the recom-
mended pressure when the tires are cold. Normal
pressure should be maintained in the front tires.
Trailer tire condition, size, load rating and proper infla-
tion pressure should be in accordance with the trailer
manufacturer’s specifications.
In the event your vehicle gets a flat tire when towing a
trailer, ask a commercial road service to repair the flat tire.
If you carry a regular size spare tire in your vehicle or
trailer as a precaution against getting a flat tire, be
sure that the spare tire is firmly secured. !
Trailer towing tips
"Never exceed 45 mph (72 km/h) when towing
a trailer in hilly country on hot days. " When towing a trailer, steering, stability,
stopping distance and braking performance
will be different from normal operation. For
safety’s sake, you should employ extra caution
when towing a trailer and you should never speed. You should also keep the following tips
in mind:
! Before starting out on a trip
" Check that the vehicle and vehicle-to-hitch mount-
ing are in good condition. If any problems are appar-
ent, do not tow the trailer." Check that the vehicle sits horizontally with the trail-
er attached. If the vehicle is tipped sharply up at the
front and down at the rear, check the total trailer
weight, GVW, GAWs and tongue load again, then con-
firm that the load and its distribution are acceptable. " Check that the tire pressures are correct.
" Check that the vehicle and trailer are connected
properly. Confirm that.
– the trailer tongue is connected properly to the
hitch ball.
– the trailer lights connector is connected properly
and trailer’s brake lights illuminate when the vehi-
cle’s brake pedal is pressed, and that the trailer’s
turn signal lights flash when the vehicle’s turn signal
lever is operated.
– the safety chains are connected properly.
– all cargo in the trailer is secured safety in position.
– the side mirrors provide a good rearward field of
view without a significant blind spot.

9-15
In case of emergency
– CONTINUED –
surface of the wheel and hub with a cloth.
12.Put on the spare tire. Replace the wheel nuts.
Tighten them by hand.
Do not use oil or grease on the wheel studs or
nuts when the spare tire is installed. This could
cause the nuts to become loose and lead to an
accident.
13.Turn the jack handle counterclockwise to lower the vehicle. 14.Use the wheel nut wrench to securely tighten the
wheel nuts to the specified torque, following the tight-
ening order in the illustration.
The torque for tightening the nuts is 74 to 89 lbf·ft (100
to 120 N·m, 10 to 12 kgf·m). This torque is equivalent
to applying about 88 to 110 lbs (40 to 50 kg) at the top
of the wheel nut wrench. Never use your foot on the
wheel nut wrench or a pipe extension on the wrench
because you may exceed the specified torque. Have
the wheel nut torque checked at the nearest automo-
tive service facility.
15.Store the flat tire in the spare tire compartment.
Put the spacer and tighten the attaching bolt firmly.
Also store the jack and jack handle in their storage lo-
1
42
53
UG9511BB
UB9518CA

9-22
In case of emergency
dealer or a commercial towing service. Observe the
following procedures for safety. !
Towing and tie-down hooks
The towing hooks should be used only in an emergen-
cy (e.g., to free a stuck vehicle from mud, sand or
snow).
" Use only the specified towing hooks and tie-
down hooks. Never use suspension parts or
other body parts for towing or tie-down purpos-
es. " Never use the tie-down hook closest to the
muffler under the vehicle for towing purposes. " To prevent deformation to the bumper and
the towing hook, do not apply excessive lateral
load to the towing hooks.
Front towing hook (OUTBACK models):
1. Take out the towing hook, screwdriver and wheel
nut wrench from the on board tool bucket. 2. Wrap a flat-head screwdriver in a vinyl tape or
cloth, insert it into the gap between the cover and the
front bumper, and use it to lever the cover open.
3. Pull the entire fog light cover toward you.
UB9214BA

11 - 1
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 ............................................................ 11-5
Engine hood .................................................. 11-5
Engine compartment overview ................... 11-8 2.5-liter non-turbo models ................................ 11-8
2.5-liter non-turbo California-spec. models .... 11-9
2.5-liter turbo models ....................................... 11-10
3.0-liter models .................................................. 11-11
Engine oil ...................................................... 11-12 Checking the oil level ....................................... 11-12
Changing the oil and oil filter .......................... 11-13
Recommended grade and viscosity ................ 11-16
Recommended grade and viscosity under severe driving conditions .............................. 11-17
Cooling system ............................................. 11-18 Hose and connections ...................................... 11-19
Engine coolant .................................................. 11-19
Air cleaner element ...................................... 11-24 Replacing the air cleaner element ................... 11-24
Spark plugs ................................................... 11-29 Recommended spark plugs ............................. 11-29
Drive belts ..................................................... 11-30 2.5-liter models .................................................. 11-30
3.0-liter models .................................................. 11-30
Manual transmission oil ............................... 11-31 Checking the oil level ....................................... 11-31
Recommended grade and viscosity ............... 11-32
Automatic transmission fluid ...................... 11-33 Checking the fluid level .................................... 11-33
Recommended fluid ......................................... 11-35
Front differential gear oil (AT vehicles) ...... 11-35 Checking the oil level ....................................... 11-35
Recommended grade and viscosity ............... 11-36
Rear differential gear oil ............................... 11-37 Checking the gear oil level .............................. 11-37
Recommended grade and viscosity ............... 11-40
Power steering fluid ...................................... 11-41 Checking the fluid level .................................... 11-41
Recommended fluid ......................................... 11-42
Brake fluid ..................................................... 11-42 Checking the fluid level .................................... 11-42
Recommended brake fluid ............................... 11-43
Clutch fluid (MT vehicles) ............................ 11-43 Checking the fluid level .................................... 11-43
Recommended clutch fluid .............................. 11-44
Brake booster ................................................ 11-44
Brake pedal .................................................... 11-45 Checking the brake pedal free play ................ 11-45
Checking the brake pedal reserve distance ... 11-45
Clutch pedal (Manual transmission vehicles) ..................................................... 11-46Checking the clutch function .......................... 11-46
Checking the clutch pedal free play ............... 11-46
Replacement of brake pad and lining ......... 11-47