2004 SUBARU IMPREZA transmission

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

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 - 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 - 8
Maintenance and service
Engine compartment overview !
2.5 liter model
12 345 67
8
9
10
11
12
13
UGB505BB
1) Manual transmission oil level
gauge (MT) (page 11-28) or Dif-
ferential gear oil level gauge
(AT) (page 11-33)
2) Air cleaner element (page 11- 23)
3) Clutch fluid reservoir (page 11- 38)
4) Automatic transmission fluid lev-
el gauge (page 11-31)
5) Brake fluid reservoir (page 11-
37)
6) Windshield washer tank (page 11-54)
7) Fuse box (page 11-60)
8) Battery (page 11-58)
9) Engine oil filler cap (page 11-11)
10) Engine coolant reservoir (page 11-19)
11) Radiator cap (page 11-19)
12) Engine oil level gauge (page 11- 11)
13) Power steering fluid reservoir
(page 11-36)

11 - 9
Maintenance and service
– CONTINUED –
!2.0 liter (Turbo) model
34 5 6 7
1
2
13 12 11 10 9 8
HGB005CB
1) Manual transmission oil level gauge (MT) (page 11-28) or Dif-
ferential gear oil level gauge
(AT) (page 11-33)
2) Air cleaner element (page 11- 23)
3) Clutch fluid reservoir (page 11- 38)
4) Automatic transmission fluid lev-
el gauge (page 11-31)
5) Brake fluid reservoir (page 11-
37)
6) Windshield washer tank (page 11-54)
7) Fuse box (page 11-60)
8) Battery (page 11-58)
9) Engine oil filler cap (page 11-11)
10) Engine coolant reservoir (page 11-19)
11) Engine oil level gauge (page 11-
11)
12) Radiator cap (page 11-19)
13) Power steering fluid reservoir
(page 11-36)

11 - 1 0
Maintenance and service !
2.5 liter (Turbo) model
34 5 6
7
1
2
12 11 10 9 8
UGB070BB
1) Manual transmission oil level gauge (MT) (page 11-28)
2) Air cleaner element (page 11-
23)
3) Clutch fluid reservoir (page 11- 38)
4) Brake fluid reservoir (page 11- 37)
5) Windshield washer tank (page
11-54)
6) Fuse box (page 11-60)
7) Battery (page 11-58)
8) Engine oil filler cap (page 11-11)
9) Engine coolant reservoir (page
11-19)
10) Engine oil level gauge (page 11- 11)
11) Radiator cap (page 11-19)
12) Power steering fluid reservoir (page 11-36)

11 - 2 8
Maintenance and service
your SUBARU dealer.
in (mm)Manual transmission oil !Checking the oil level
5 speed transmission (Non-turbo model)
1) Yellow handle
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)
HGB056DB
1

11 -2 9
Maintenance and service
– CONTINUED –
5 speed transmission (Turbo model) 6 speed transmission
1. Park the vehicle on a level surface and stop the en-
gine.
2. Pull out the dipstick, wipe it clean, and insert it
again.
HGB055BAUGB548CA