2003 SUBARU IMPREZA WRX engine

Maintenance and service
11-37
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Brake pedal
Check the brake pedal free play and reserve dis-
tance according to the maintenance schedule in the“Warranty and Maintenance Booklet ”.
Checking the brake pedal free play
1) 0.04 – 0.12 in (1.0 – 3.0 mm)
Stop the engine and firmly depress the brake pedal
several times. Lightly press the brake pedal down
with one finger to check the free play with a force ofless than 2 lb (10 N, 1 kg).
If the free play is not within proper specification, contact your SUBARU dealer.
Checking the brake pedal reserve dis- tance
1) More than 2.56 in (65 mm)
Depress the pedal with a force of approximately 66
lb (294 N, 30 kg) and measure the distance be-
tween the upper surface of the pedal pad and the
floor.
When the measurement is smaller than the specifi-
cation, or when the pedal does not operate smooth-
ly, contact with your SUBARU dealer.

Maintenance and service
11-38
Clutch pedal (MT vehicles)
Check the clutch pedal free play and reserve dis-
tance according to the maintenance schedule in the“Warranty and Maintenance Booklet ”.
Checking the clutch function
Check the clutch engagement and disengagement.
1. With the engine idling, check that there are no
abnormal noises when the clutch pedal is de-
pressed, and that shifting into 1st or reverse feelssmooth.
2. Start the vehicle by releasing the pedal slowly tocheck that the engine and transmission smoothly
couple without any sign of slippage.
Checking the clutch pedal free play
1) 0.16 – 0.51 in (4.0 –13.0 mm)
Lightly press the clutch pedal down with your finger
until you feel resistance, and check the free play.
If the free play is not within proper specification,
contact your SUBARU dealer.

Maintenance and service
11-51
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Washer Fluid
ConcentrationFreezing
Temperature
30% 50%
100%10.4 °F ( –12 °C)
–4 °F ( –20 °C)
–49 °F ( –45 °C)
CAUTION
Never use engine coolant as washer fluid be-
cause it could cause paint damage. Replacement of windshield wiper blades
Grease, wax, insects, or other material on the wind-
shield or the wiper blade results in jerky wiper
operation and streaking on the glass. If you cannot
remove the streaks after operating the windshield
washer or if the wiper operation is jerky, clean the
outer surface of the windshield (or rear window) andthe wiper blades using a sponge or soft cloth with a
neutral detergent or mild-abrasive cleaner. After
cleaning, rinse the windshield and wiper blades with
clean water. The windshield is clean if beads do not
form when you rinse the windshield with water.
CAUTION
Do not clean the wiper blades with gasoline or a solvent, such as paint thinner or benzene. This will cause deterioration of the wiperblades.
If you cannot eliminate the streaking even after fol-
lowing this method, replace the wiper blades using
the following procedures:
1. Raise the wiper arm off the windshield.

Maintenance and service
11-57
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To remove the coin tray, open the cover and pull the
coin tray out.The other one is housed in the engine compartment.

Maintenance and service
11-58
1) Fuse puller 2) Spare fuse
The fuse puller and spare fuses are stored in the
main fuse box cover in the engine compartment.A) Good B) Blown
If any lights, accessories or other electrical controls
do not operate, inspect the corresponding fuse. If a
fuse has blown, replace it.
1. Turn the ignition switch to the “LOCK” position
and turn off all electrical accessories.
2. Remove the cover.
3. Determine which fuse may be blown. The backside of each fuse box cover and the “Fuse and cir-
cuits” section in chapter 12 in this manual show the
circuit for each fuse.

12
12-1
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Specifications 12-2
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Dimensions 12-2
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Engine 12-3
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Electrical system 12-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Capacities 12-4
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Tires 12-5
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Wheel alignment 12-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses and circuits 12-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse panel located behind the coin tray 12-6 . . . . . .
Fuse panel located in the engine compartment 12-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulb chart 12-9
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Vehicle identification 12-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications

Specifications
12-3
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Engine
Engine model
EJ251
(2.5-liter, SOHC, non-turbo)EJ205
(2.0-liter, DOHC, turbo)
Engine typeHorizontally opposed, liquid cooled 4 cylinder, 4-stroke gasoline engine
Displacement cu in. (cc)150 (2,457)122 (1,994)
Bore × Stroke in. (mm)3.9 × 3.1 (99.5 × 79.0)3.6 × 2.9 (92.0 × 75.0)
Compression ratio10.0 : 18.0 : 1
Firing order1 – 3 – 2 – 4
Electrical system
Battery type and
it (5HR)MT12V-48AH (55D23L)capacity (5HR)ATWith 2.5-liter engine12V-52AH (75D23L)
With 2.0-liter turbo engine12V-52AH (65D23L)
Alternator2.5-liter engine12V – 75A
2.0-liter turbo engine12V – 75A
Spark plugs2.5-liter engineRC10YC4 (Champion)
BKR6E-11 (NGK)
BKR5E-11 (NGK)
2.0-liter turbo enginePFR6G (NGK)
AT : Automatic transmission MT : Manual transmission

Specifications
12-4
Capacities
Fuel tank
15.9 US gal (60 liters, 13.2 Imp gal)
Engine oil2.5-liter engine model4.2 US qt (4.0 liters, 3.5 Imp qt)
2.0-liter turbo engine model4.8 US qt (4.5 liters, 4.0 Imp qt)
Transmission oil (MT)3.7 US qt (3.5 liters, 3.1 Imp qt)
Transmission oil (AT)10.0 US qt (9.5 liters, 8.4 Imp qt)
Power steering gear fluid0.7 US qt (0.7 liter, 0.6 Imp qt)
Engine coolant2.5-liter engine modelMT7.4 US qt (7.0 liters, 6.2 Imp qt)
AT7.3 US qt (6.9 liters, 6.1 Imp qt)
2.0-liter turbo engine modelMT8.1 US qt (7.7 liters, 6.8 Imp qt)
AT8.0 US qt (7.6 liters, 6.7 Imp qt)
AT : Automatic transmission MT : Manual transmission