wheel SUBARU IMPREZA 2004 2.G Repair Manual

9-21
In case of emergency
– CONTINUED –
!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 transmis-
sion in neutral.
3. The ignition switch should be in the “ACC” position
while the vehicle is being towed.
4. Take up slack in the towline slowly to prevent dam-
age to the vehicle.
" Never turn the ignition switch to the “LOCK”
position while the vehicle is being towed be- cause the steering wheel and the direction of
the wheels will be locked. "
Remember that the brake booster and power
steering do not function when the engine is not
running. Because the engine is turned off, it will
take greater effort to operate the brake pedal
and steering wheel.
" If transmission failure occurs, transport your
vehicle on a flat-bed truck. " Do not run the engine while being towed us-
ing this method. Transmission damage could
result if the vehicle is towed with the engine
running. " For vehicles with automatic transmission,
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.
HG9024AA

9-24
In case of emergency
Maintenance tools
Your vehicle is equipped with the following mainte-
nance tools:
Wheel cover remover (vehicles with wheel covers)
Screwdriver
Towing hook (eye bolt)
Wheel nut wrench
Hex-headed wrench (vehicles with moonroof) !
Jack and jack handle
The jack is stored on the left side of the trunk or cargo
area.
To take out the jack, turn the jackscrew counterclock-
UG9521AA
UG9505BA

10-1
10
Appearance care
Exterior care .................................................. 10-2 Washing ............................................................. 10-2
Waxing and polishing ....................................... 10-3
Cleaning aluminum wheels .............................. 10-3
Corrosion protection .................................... 10-4 Most common causes of corrosion ................ 10-4
To help prevent corrosion ............................... 10-5
Cleaning the interior ..................................... 10-6 Seat fabric ......................................................... 10-6
Leather seat materials ...................................... 10-6
Synthetic leather upholstery ........................... 10-6
Climate control panel, audio panel, instrument panel, console panel, and switches ............. 10-7

10-3
Appearance care
– CONTINUED –
flush the suspension and axle parts, as they are par-
ticularly prone to mud and sand buildup. Do not use a
sharp-edged tool to remove caked mud.
NOTE
Be careful not to damage brake hoses, sensor har-
nesses, and other parts when washing suspen-
sion components. !Using a warm water washer
" Keep a good distance of 12 in (30 cm) or more be-
tween the washer nozzle and the vehicle. " Do not wash the same area continuously.
" If a stain will not come out easily, wash by hand.
Some warm water washers are of the high tempera-
ture, high pressure type, and they can damage or de-
form the resin parts such as mouldings, or cause wa-
ter to leak into the vehicle. ! Waxing and polishing
Always wash and dry the vehicle before waxing and
polishing.
Use a good quality polish and wax and apply them ac-
cording to the manufacturer’s instructions. Wax or pol-
ish when the painted surface is cool.
Be sure to polish and wax the chrome trim, as well as
the painted surfaces. Loss of wax on a painted surface leads to loss of the original luster and also quickens
the deterioration of the surface. It is recommended
that a coat of wax be applied at least once a month, or
whenever the surface no longer repels water.
If the appearance of the paint has diminished to the
point where the luster or tone cannot be restored,
lightly polish the surface with a fine-grained com-
pound. Never polish just the affected area, but include
the surrounding area as well. Always polish in only
one direction. A No. 2000 grain compound is recom-
mended. Never use a coarse-grained compound.
Coarser grained compounds have a smaller grain-size
number and could damage the paint. After polishing
with a compound, coat with wax to restore the original
luster. Frequent polishing with a compound or an in-
correct polishing technique will result in removing the
paint layer and exposing the undercoat. When in
doubt, it is always best to contact your SUBARU deal-
er or an auto paint specialist.
NOTE
Be careful not to block the windshield washer noz-
zles with wax when waxing the vehicle. !
Cleaning aluminum wheels
" Promptly wipe the aluminum wheels clean of any
kind of grime or agent. If dirt is left on too long, it may

10-4
Appearance care
be difficult to clean off. "
Do not use soap containing grit to clean the wheels.
Be sure to use a neutral cleaning agent, and later rinse
thoroughly with water. Do not clean the wheels with a
stiff brush or expose them to a high-speed washing
device." Clean the vehicle (including the aluminum wheels)
with water as soon as possible when it has been
splashed with sea water, exposed to sea breezes, or
driven on roads treated with salt or other agents.Corrosion protection
Your SUBARU has been designed and built to resist
corrosion. Special materials and protective finishes
have been used on most parts of the vehicle to help
maintain fine appearance, strength, and reliable oper-
ation. ! Most common causes of corrosion
The most common causes of corrosion are:
1. The accumulation of moisture retaining dirt and de-
bris in body panel sections, cavities, and other areas.
2. Damage to paint and other protective coatings
caused by gravel and stone chips or minor accidents.
Corrosion is accelerated on the vehicle when:
1. It is exposed to road salt or dust control chemicals,
or used in coastal areas where there is more salt in the
air, or in areas where there is considerable industrial
pollution.
2. It is driven in areas of high humidity, especially
when temperatures range just above freezing.
3. Dampness in certain parts of the vehicle remains
for a long time, even though other parts of the vehicle
may be dry.
4. High temperatures will cause corrosion to parts of
the vehicle which cannot dry quickly due to lack of

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 model .................................................... 11-8
2.0 liter (Turbo) model ...................................... 11-9
2.5 liter (Turbo) model ...................................... 11-10
Engine oil ...................................................... 11-11 Checking the oil level ....................................... 11-11
Changing the oil and oil filter .......................... 11-12
Recommended grade and viscosity ................ 11-16
Recommended grade and viscosity under severe driving conditions .............................. 11-18
Synthetic oil ....................................................... 11-18
Cooling system ............................................. 11-18 Cooling fan, hose and connections ................ 11-19
Engine coolant .................................................. 11-19
Air cleaner element ...................................... 11-23 Replacing the air cleaner element ................... 11-23
Spark plugs ................................................... 11-26 Recommended spark plugs ............................. 11-27
Drive belts ..................................................... 11-27
Manual transmission oil ............................... 11-28 Checking the oil level ....................................... 11-28
Recommended grade and viscosity ................ 11-30 Automatic transmission fluid ...................... 11-31
Checking the fluid level .................................... 11-31
Recommended fluid ......................................... 11-32
Front differential gear oil (AT vehicles) ...... 11-33 Checking the oil level ....................................... 11-33
Recommended grade and viscosity ............... 11-33
Rear differential gear oil ............................... 11-34 Checking the gear oil level .............................. 11-34
Recommended grade and viscosity ............... 11-35
Power steering fluid ...................................... 11-36 Checking the fluid level .................................... 11-36
Recommended fluid ......................................... 11-37
Brake fluid ..................................................... 11-37 Checking the fluid level .................................... 11-37
Recommended brake fluid ............................... 11-38
Clutch fluid (MT vehicles) ............................ 11-38 Checking the fluid level .................................... 11-38
Recommended clutch fluid .............................. 11-39
Brake booster ................................................ 11-40
Brake pedal .................................................... 11-40 Checking the brake pedal free play ................ 11-40
Checking the brake pedal reserve distance ... 11-41
Clutch pedal (MT vehicles) ........................... 11-41 Checking the clutch function .......................... 11-41
Checking the clutch pedal free play ............... 11-42
Replacement of brake pad and lining ......... 11-42 Breaking-in of new brake pads and linings .... 11-43
Parking brake stroke .................................... 11-44
Tires and wheels ........................................... 11-44

11 - 2
Maintenance and service
Types of tires .................................................... 11-44
Tire inspection .................................................. 11-45
Tire pressures and wear .................................. 11-45
Wheel balance ................................................... 11-48
Wear indicators ................................................. 11-49
Tire rotation ....................................................... 11-50
Tire replacement ............................................... 11-50
Wheel replacement ........................................... 11-51
Wheel covers .................................................... 11-52
Aluminum wheels (If equipped) .................. 11-53
Intercooler water spray ................................ 11-53
Windshield washer fluid .............................. 11-54
Replacement of windshield wiper blades .. 11-55
Battery ........................................................... 11-58
Fuses ............................................................. 11-60
Main fuse ....................................................... 11-63
Installation of accessories .......................... 11-63
Replacing bulbs ............................................ 11-64 Headlights (U.S. spec. WRX-STi) .................... 11-66
Headlight (Except U.S. spec. WRX-STi) .......... 11-66
Front turn signal light bulbs ............................ 11-69
Parking light ...................................................... 11-70
Front fog light ................................................... 11-73
Rear combination lights ................................... 11-74
License plate light ............................................ 11-76
Dome light, map light and cargo area light .... 11-77
Trunk light ......................................................... 11-78
High mount stop light ...................................... 11-78

11 - 3
Maintenance and service
– CONTINUED –
Maintenance and serviceMaintenance schedule
The scheduled maintenance items required to be ser-
viced at regular intervals are shown in the “Warranty
and Maintenance Booklet”.
For details of your maintenance schedule, read the
separate “Warranty and Maintenance Booklet”.Maintenance precautions
When maintenance and service are required, it is rec-
ommended that all work be done by an authorized
SUBARU dealer.
If you perform maintenance and service by yourself,
you should familiarize yourself with the information
provided in this section on general maintenance and
service for your SUBARU.
Incorrect or incomplete service could cause improper
or unsafe vehicle operation. Any problems caused by
improper maintenance and service performed by you
are not eligible for warranty coverage.
"Testing of an All-Wheel Drive vehicle must
NEVER be performed on a single two-wheel dy-
namometer or similar apparatus. Attempting to
do so will result in transmission damage and in
uncontrolled vehicle movement and may cause
an accident or injuries to persons nearby. " Always select a safe area when performing
maintenance on your vehicle." Always be very careful to avoid injury when
working on the vehicle. Remember that some of

11 -4 3
Maintenance and service
– CONTINUED –
If you continue to drive despite the scraping
noise from the audible brake pad wear indica-
tor, it will result in the need for costly brake ro-
tor repair or replacement.
! Breaking-in of new brake pads and lin- ings
When replacing the brake pad or lining, use only gen-
uine SUBARU parts. After replacement, the new parts
must be broken in as follows: ! Brake pad and lining
While maintaining a speed of 30 to 40 mph (50 to 65
km/h), step on the brake pedal lightly. Repeat this five
or more times. ! Parking brake lining
1. Drive the vehicle at a speed of about 22 mph (35 km/h).
2. With the parking brake release button pushed in,
pull the parking brake lever SLOWLY and GENTLY.
(Pulling with a force of approximately 33 lb [147 N, 15 kg].)
3. Drive the vehicle for about 220 yards (200 meters) in this condition.
4. Wait 5 to 10 minutes for the parking brake to cool
down. Repeat this procedure.
5. Check the parking brake stroke. If the parking
brake stroke is out of the specified range, adjust it by
turning the adjusting nut located on the parking brake
lever.
Parking brake stroke:
7 – 8 notches / 44 lb (196 N, 20 kg)
A safe location and situation should be select-ed for break-in driving.
Pulling the parking brake lever too forcefully
may cause the rear wheels to lock. To avoid
this, be certain to pull the lever up slowly and
gently.

11 - 4 4
Maintenance and service
Parking brake stroke
Check the parking brake stroke according to the main-
tenance schedule in the “Warranty and Maintenance
Booklet”. When the parking brake is properly adjusted,
braking power is fully applied by pulling the lever up
seven to eight notches gently but firmly (about 44 lb,
196 N, 20 kg). If the parking brake lever stroke is not
within the specified range, have the brake system
checked and adjusted at your SUBARU dealer.Tires and wheels !
Types of tires
You should be familiar with type of tires present on your vehicle.
The factory-fitted 17-inch tires on the WRX-STi are
summer tires. The factory-fitted tires on other versions
are all-season tires. The 17-inch tires that can be deal-
er-fitted on the WRX as an option are summer tires. ! All season tires
All season tires are designed to provide an adequate
measure of traction, handling and braking perfor-
mance in year-round driving including snowy and icy
road conditions. However all season tires do not offer
as much traction performance as winter (snow) tires in
heavy or loose snow or on icy roads.
All season tires are identified by “ALL SEASON” and/
or “M+S” (Mud & Snow) on the tire sidewall. ! Summer tires
Summer tires are high-speed capability tires best suit-
ed for highway driving under dry conditions.
Summer tires are inadequate for driving on slippery
roads such as on snow-covered or icy roads.
If you drive your vehicle on snow-covered or icy roads,
we strongly recommend the use of winter (snow) tires.
UG7509CA