engine SUBARU IMPREZA 2002 2.G Repair Manual

In case of emergency
9-4
HB8003BC
1) Spare fuse
2) FWD connector
NOTE
(If your vehicle is AWD with automatic transmis-
sion, except Turbo models) Before driving your
vehicle with the temporary spare tire, put a sparefuse inside the FWD connector in the main fusebox located in the engine compartment and con-firm that the Front-wheel drive warning light
“FWD” in the combination meter comes on. The
all wheel drive capability of the vehicle has now
deactivated. After re-installing the conventionaltire, remove the spare fuse from the FWD con-nector in order to reactivate all wheel drive.
CAUTION
Never use any temporary spare tire other than the original. Using other sizes may result in
severe mechanical damage to the drive train of your vehicle.

In case of emergency
9-5
– CONTINUED –
Flat tires
If you have a flat tire while driving, never brake sud- denly; keep driving straight ahead while gradually
reducing speed. Then slowly pull off the road to asafe place. Changing a flat tire
WARNING
Do not jack up the vehicle on an incline or a
loose road surface. The jack can come out of
the jacking point or sink into the ground and this can result in a severe accident. Use only the jack provided with your ve-
hicle. The jack supplied with the vehicle is de-signed only for changing a tire. Never get un-der the vehicle while supporting the vehicle with this jack. Always turn the engine off before raising the
flat tire off the ground using the jack. Neverswing or push the vehicle supported with the
jack. The jack can come out of the jackingpoint due to a jolt and this can result in a
severe accident. 1. Park on a hard, level surface, whenever possible,
then stop the engine.
2. Set the parking brake securely and shift a manual
transmission vehicle in reverse or an automatictransmission vehicle in the
“P” (Park) position.
3. Turn on the hazard warning flasher and have ev-
eryone get out of the vehicle.
HGS038BA
4. Put wheel blocks at the front and rear of the tire
diagonally opposite the flat tire.

In case of emergency
9-12
Jump starting
WARNING
Battery fluid is SULFURIC ACID. Do not let it
come in contact with the eyes, skin, clothing or the vehicle. If battery fluid gets on you, thoroughly flush
the exposed area with water immediately. Get
medical help if the fluid has entered your
eyes.
If battery fluid is accidentally swallowed, im-
mediately drink a large amount of milk or wa-
ter, and obtain immediate medical help. Keep everyone including children away from
the battery. The gas generated by a battery explodes if a
flame or spark is brought near it. Do not
smoke or light a match while jump starting. Never attempt jump starting if the dis-
charged battery is frozen. It could cause thebattery to burst or explode. Whenever working on or around a battery,
always wear suitable eye protectors, and re- move metal objects such as rings, bands or
other metal jewelry.
Be sure the jumper cables and clamps on
them do not have loose or missing insulation.
Do not jump start unless cables in suitablecondition are available. A running engine can be dangerous. Keep
your fingers, hands, clothing, hair and tools away from the cooling fan, belts and any other
moving engine parts. Removing rings,watches and ties is advisable.
When your vehicle does not start due to a run down
(discharged) battery, the vehicle may be jump
started by connecting your battery to another bat-
tery (called the booster battery) with jumper cables.
Jump starting is dangerous if it done incorrectly. If
you are unsure about the proper procedure for jump
starting, consult a competent mechanic. How to jump start
1. Make sure the booster battery is 12 volts and the
negative terminal is grounded.
2. If the booster battery is in another vehicle, do notlet the two vehicles touch.
3. Turn off all unnecessary lights and accessories.
4. Connect the jumper cables exactly in the se-
quence illustrated.

In case of emergency
9-13
– CONTINUED –
HB8007BC
1) Booster battery
2) Engine lifting bracket

In case of emergency
9-14
(1) Connect one jumper cable to the positive (+)
terminal on the discharged battery.
(2) Connect the other end of the jumper cable to
the positive (+) terminal of the booster battery.
(3) Connect one end of the other cable to thenegative (–) terminal of the booster battery.
(4) Connect the other end of the cable to the en-gine lifting bracket.
Make sure that the cables are not near any mov-
ing parts and that the cable clamps are not in
contact with any other metal.
5. Start the engine of the vehicle with the booster
battery and run it at moderate speed. Then start the
engine of the vehicle that has the discharged bat-
tery.
6. When finished, carefully disconnect the cables in
exactly the reverse order. Engine overheating
WARNING
Never attempt to remove the radiator cap until the engine has been shut off and has fullycooled down. When the engine is hot, thecoolant is under pressure. Removing the cap
while the engine is still hot could release aspray of boiling hot coolant, which could burn
you very seriously.
If the engine overheats, safely pull off the road and stop the vehicle in a safe place. If steam is coming from the engine compartment
Turn the engine off and get everyone away from the
vehicle until it cools down. If no steam is coming from the engine compartment
1. Keep the engine running at idling speed.
2. Open the hood to ventilate the engine compart-ment.

In case of emergency
9-15
– CONTINUED –
Confirm that the cooling fan is turning. If the fan is
not turning, immediately turn the engine off and con-
tact your authorized dealer for repair.
3. After the engine coolant temperature has
dropped, turn off the engine.
If the temperature gauge stays at the overheated
zone, turn the engine off.
4. After the engine has fully cooled down, check the
coolant level in the reserve tank.If the coolant level is below the “MIN” mark, add
coolant up to the “MAX” mark.
5. If there is no coolant in the reserve tank, add
coolant to the reserve tank. Then remove the radia- tor cap and fill the radiator with coolant.
If you remove the radiator cap from a hot radiator,
first wrap a thick cloth around the radiator cap, then
turn the cap counterclockwise slowly without press-
ing down until it stops. Release the pressure from
the radiator. After the pressure has been fully re-
leased, remove the cap by pressing down and turn-ing it. Towing
If towing is necessary, it is best done by your
SUBARU dealer or a commercial towing service.
Observe the following procedures for safety.
HG9000BA
WARNING
Never tow AWD vehicles (both AT and MT) with the front wheels raised off the groundwhile the rear wheels are on the ground, orwith the rear wheels raised off the ground while the front wheels are on the ground. This will cause the vehicle to spin away due to the

In case of emergency
9-19
– CONTINUED –
3. Secure the vehicle onto the carrier properly with safety chains. Each of safety chain should be
equally tightened and care must be taken not to pull
the chains so tightly that the suspension bottomsout.
CAUTION
If your vehicle has a front underspoiler and rear underspoiler (both optional), be carefulnot to scrape them when placing the vehicleon the carrier and when removing the vehicle
from the carrier.
Towing with all wheels on the ground
HG9001AA
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” posi-
tion while the vehicle is being towed.
4. Take up slack in the towline slowly to prevent
damage to the vehicle.
WARNING
Never turn the ignition switch to the “LOCK”
position while the vehicle is being towed be-
cause the steering wheel and the direction ofthe wheels will be locked. Remember that the brake booster and pow-
er steering do not function when the engine is not running. Because the engine is turned off,
it will take greater effort to operate the brakepedal and steering wheel.

In case of emergency
9-20
CAUTION
If transmission failure occurs, transport
your vehicle on a flat-bed truck. Do not run the engine while being towed in
this method. Transmission damage could re- sult if the vehicle is towed with engine run-ning. For vehicles with automatic transmission,
the traveling speed must be limited to less than 20 mph (30 km/h) and the traveling dis- tance to less than 31 miles (50 km). Forgreater speeds and distances, transport your
vehicle on a flat-bed truck. Maintenance tools
HG9010AA
Your vehicle is equipped with the following mainte-
nance tools:
Wheel cover remover (vehicles with wheel covers)
Screwdriver
Towing eye
Wheel nut wrench

Appearance care
10-2
Exterior care Washing
The best way to preserve your vehicle ’s beauty is
frequent washing. Wash the vehicle at least once a
month to avoid contamination by road grime.
Wash dirt off with a wet sponge and plenty of luke-
warm or cold water. Do not wash the vehicle with hot
water and in direct sunlight.
Salt, chemicals, insects, tar, soot and bird droppings
should be washed off by using a light detergent, as
required. If you use a light detergent, make certain
that it is a neutral detergent. Do not use strong soap or chemical detergents. All cleaning agents should
be promptly flushed from the surface and not al-
lowed to dry there. Rinse the vehicle thoroughly with
plenty of lukewarm water. Wipe the remaining water
off with a chamois or soft cloth. NOTE When having your vehicle washed in an auto- matic car wash, make sure beforehand that thecar wash is of suitable type. If the vehicle is
equipped with a rear/roof spoiler, it may be dam-aged by car wash brushes or other equipment.CAUTION
When washing the vehicle, the brakes may
get wet. As a result, the brake stopping dis-
tance will be longer. To dry the brakes, drive the vehicle at a safe speed while lightly press-ing the brake pedal to heat up the brakes. Do not wash the engine compartment and
area adjacent to it. If water enters the engineair intake, electrical parts or the power steer-
ing fluid reservoir, it will cause engine trouble
or faulty power steering respectively.
Washing the underbody
Chemicals, salts and gravel used for deicing road
surfaces are extremely corrosive, accelerating the
corrosion of underbody components, such as the exhaust system, fuel and brake lines, brake cables, floor pan and fenders, and suspension.
Thoroughly flush the underbody and inside of the
fenders with lukewarm or cold water at frequent in-
tervals to reduce the harmful effects of such agents.
Using a warm water washer
Keep a good distance of 12 in (30 cm) or more
between the washer nozzle and the vehicle. Do not wash the same area continuously.

11
11-1
– CONTINUED –
Maintenance schedule 11-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance precautions 11-3 . . . . . . . . . . . . . . . . . . . . . . . .
Engine hood 11-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine compartment overview 11-7 . . . . . . . . . . . . . . . . .
2.5 liter model 11-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.0 liter (Turbo) model 11-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine oil 11-9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the oil level 11-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing the oil and oil filter 11-10 . . . . . . . . . . . . . . . . . . .
Recommended grade and viscosity 11-11 . . . . . . . . . . .
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 11-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the air cleaner element 11-18 . . . . . . . . . . . . . .
Spark plugs 11-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended spark plugs 11-21 . . . . . . . . . . . . . . . . . . . . .
Drive belts 11-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual transmission oil 11-23 . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the oil level 11-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended grade and viscosity 11-24 . . . . . . . . . . .
Automatic transmission fluid 11-24 . . . . . . . . . . . . . . . . . . .
Checking the fluid level 11-24 . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended fluid 11-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front differential gear oil (AT vehicles) 11-26 . . . . . Checking the oil level 11-26
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended grade and viscosity 11-26 . . . . . . . . . . .
Rear differential gear oil 11-27 . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the gear oil level 11-27 . . . . . . . . . . . . . . . . . . . . . . .
Recommended grade and viscosity 11-28 . . . . . . . . . . .
Power steering fluid 11-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the fluid level 11-29 . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended fluid 11-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake fluid 11-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the fluid level 11-30 . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended brake fluid 11-31 . . . . . . . . . . . . . . . . . . . . . . .
Clutch fluid (MT vehicles) 11-31 . . . . . . . . . . . . . . . . . . . . . . . .
Checking the fluid level 11-31 . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended clutch fluid 11-32 . . . . . . . . . . . . . . . . . . . . . .
Brake booster 11-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake pedal 11-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the brake pedal free play 11-33 . . . . . . . . . . . .
Checking the brake pedal reserve distance 11-34 . .
Clutch pedal (MT vehicles) 11-34 . . . . . . . . . . . . . . . . . . . . . .
Checking the clutch function 11-34 . . . . . . . . . . . . . . . . . . . .
Checking the clutch pedal free play 11-35 . . . . . . . . . . .
Replacement of brake pad and lining 11-35 . . . . . . . .
Breaking-in of new brake pads and linings 11-36 . . .
Parking brake stroke 11-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tires and wheels 11-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Types of tires 11-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire inspection 11-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire pressures and wear 11-38 . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance and service