Subaru Impreza 10 2001 Service Manual

Maintenance and service

Maintenance schedule 10-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance precautions 10-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Engine compartment overview 10-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Engine oil 10-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cooling system 10-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Engine coolant 10-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Air cleaner element 10-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Spark plugs 10-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Drive belts 10-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Manual transmission oil 10-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Automatic transmission fluid 10-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Front differential gear oil (Automatic transmission

vehicles) 10-22

Rear differential gear oil 10-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power steering fluid 10-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Brake fluid 10-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Clutch fluid (2.5 liter MT models) 10-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Brake booster 10-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Battery 10-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Windshield washer fluid 10-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacement of windshield wiper blades 10-32. . . . . . . . . . . . . . . . . . . . . . . .

Brake pedal 10-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Clutch pedal (Manual transmission vehicles) 10-36. . . . . . . . . . . . . . . . . . .

Replacement of brake pad and lining 10-37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parking brake stroke 10-38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tires and wheels 10-39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tire pressure 10-39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tire rotation 10-40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Aluminum wheels (if equipped) 10-42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fuses 10-43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Main fuse and fusible link 10-46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation of accessories 10-46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacing bulbs 10-47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Headlight 10-47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10

Fog light (if equipped) 10-48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parking light 10-50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Front turn signal light 10-51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Side turn signal light 10-52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rear combination lights 10-53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

License plate light 10-55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Interior light, spot light 10-55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10-2

Maintenance and service

Maintenance schedule

The scheduled maintenance items required to be serviced 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 recommended 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.

WARNING

D Testing of a Full-Time All-Wheel Drive vehicle must NEVER be
performed on a single two-wheel dynamometer or similar appara­tus nor should you install FWD fuse in the engine compartment.
Attempting to do so will result in transmission damage and in
uncontrolled vehicle movement and may cause an accident or
injuries to persons nearby .
D Always select a safe area when performing maintenance on
your vehicle.
D Always be very careful to avoid injury when working on the ve­hicle. Remember that some of the materials in the vehicle may be
hazardous if improperly used or handled, for example, battery
acid.
D Your vehicle should only be serviced by persons fully compe­tent to do so. Serious personal injury may result to persons not
experienced in servicing vehicles.

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10-3

D Always use the proper tools and make certain that they are
well maintained.
D Never get under the vehicle supported only by jack. Always
use a safety stands to support the vehicle.
D Never keep the engine running in a poorly ventilated area,
such as a garage or other closed areas.
D Do not smoke or allow open flames around the fuel or battery.
This will cause a fire.
D Wear adequate eye protection to guard against getting oil or
other fluids in your eyes. If something does get in your eyes,
thoroughly wash it out with clean water.
D Because the fuel system is under pressure, replacement of the
fuel filter should be performed only by your SUBARU dealer.
D The SRS airbag has no user-serviceable parts. Tampering with
or disconnecting the system’s wiring could result in accidental
inflation of the airbag or could make the system inoperative,
which may result in serious injury. The wiring harnesses of the
SRS airbag system are covered with yellow insulation and the
connectors of the system are yellow, for easy identification. Do
not use electrical test equipment on any circuit related to the SRS
airbag system. For required servicing of the SRS airbag, see your
nearest SUBARU dealer.

J Before checking or servicing in the engine compart -

ment

D Always stop the engine and set the parking brake firmly to pre­vent the vehicle from moving.
D Always let the engine cool down. Engine parts become very
hot when the engine is running and remain hot for some time af­ter the engine is stopped.
D Do not spill engine oil, engine coolant, brake fluid or any other
fluid on hot engine components. This may cause a fire.
D Always remove the key from the ignition switch. When the
ignition switch is in the “ON” position, the cooling fan may oper-
ate suddenly even when the engine is stopped.

10-4

Maintenance and service

J When you do checking or servicing in the engine

compartment while the engine is running

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.

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10-5

Engine compartment overview

HGA017BB

1 Manual transmission oil level

gauge (MT) (page 10-19) or
Differential gear oil level
gauge (AT) (page 10-22)

2 Air cleaner element

(page 10-16)

3 Clutch fluid reservoir

(page 10-28)

4 Automatic transmission fluid

level gauge (page 10-20)

5 Brake fluid reservoir

(page 10-26)

6 Fuel filter

10-6

7 Windshield washer tank

(page 10-31)

8 Fuse box (page 10-43)
9 Battery (page 10-29)
Q Engine oil filler cap

(page 10-7)

W Engine coolant reservoir

(page 10-13)

E Engine oil level gauge

(page 10-7)

R Power steering fluid reservoir

(page 10-25)

T Radiator cap (page 10-13)

Engine oil

B Checking the oil level

Check the engine oil level at each fuel stop.

Maintenance and service

Upper
level

Lower
level

Notch

OM-H0189HG0351

1. Park the vehicle on a level surface and stop the engine.

2. Pull out the dipstick, wipe it clean, and insert it again.

3. Be sure the dipstick is correctly inserted until it stops with the
graphic symbol on its top appearing as shown in the illustra­tion.

4. Pull out the dipstick again and check the oil level on it. If it is below
the lower level, add oil to bring the level up to the upper level.

CAUTION

Use only engine oil with the recommended grade and viscosity .

If you check the oil level just after stopping the engine, wait a few min­utes for the oil to drain back into the oil pan before checking the level.

Just after driving or while the engine is warm, the engine oil level
reading may be in a range between the upper level and the notch
mark. This is caused by thermal expansion of the engine oil.

To prevent overfilling the engine oil, do not add any additional oil
above the upper level when the engine is cold.

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10-7

B Changing the oil and oil filter

Change the oil and oil filter according to the maintenance schedule in
the “Warranty and Maintenance Booklet”.
The engine oil and oil filter must be changed more frequently than
listed in the maintenance schedule when driving on dusty roads,
when short trips are frequently made, when towing a trailer or when
driving in extremely cold whether.

1. Warm up the engine by letting the engine idle for about 10 minutes
to ease draining the engine oil.

2. Park the vehicle on a level surface and stop the engine.

3. Remove the oil filler cap.

Drain plug

OM-H0190

4. Drain out the engine oil by removing the drain plug while the en­gine is still warm. The used oil should be drained into an appropriate
container and disposed of properly.

WARNING

Be careful not to burn yourself with hot engine oil.

5. Wipe the seating surface of the drain plug with a clean cloth and
tighten it securely with a new sealing washer after the oil has com­pletely drained out.

10-8

Maintenance and service

Oil filter

Sealing washer

Drain plug

OM-H0192OM-H0191

6. Remove the oil filter with an oil filter wrench.

7. Before installing a new oil filter, apply a thin coat of engine oil to the
seal.

8. Clean the rubber seal seating area of the lower crank case and
install the oil filter by hand turning. Be careful not to twist or damage
the seal.

9. Tighten it approximately two-thirds of a turn after the seal makes
contact with underside of the crank case.

CAUTION

Never over tighten the oil filter because that can result in an oil
leak.

10. Pour the specified amount of engine oil through the filler neck.

Oil capacity: 4.2 US qt (4.0 liters, 3.5 Imp qt)

11. Start the engine and make sure that no oil leaks appear around
the filter’s rubber seal.

12. Run the engine until it reaches the normal operating temperature.
Then stop the engine and wait a few minutes to allow the oil drain
back. Check the oil level again and if necessary, add more engine oil.

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10-9

B Recommended grade and viscosity

CAUTION

Use only engine oil with the recommended grade and viscosity .

Oil grade: API classification SJ or SH with the words “ENERGY

CONSERVING II” (if you cannot obtain the oil with SJ
or SH grade, you may use SG grade oil.) or the new
API mark (Starburst mark) displayed on the container.

API Service label

1

New API Certification Mark
(Starburst Mark)

2

3

1 Indicates the oil quality by API designations
2 Indicates the SAE oil viscosity grade
3 Indicates that the oil has fuel saving capabilities

In choosing an oil, you want the proper quality and viscosity, as well
as one that will add to fuel economy. The following table lists the rec­ommended viscosities and applicable temperatures.
When adding oil, different brands may be used together as long as
they are the same API classification and SAE viscosity as those rec­ommended by SUBARU.

Engine oil viscosity (thickness) affects fuel economy. Oils of lower vis­cosity provide better fuel economy. However, in hot weather, oil of
higher viscosity is required to properly lubricate the engine.

10-10

Maintenance and service

SAE viscosity number and applicable
temperature

OM-H2756

B Recommended grade and viscosity under severe driving

conditions

If the vehicle is used in desert areas, in areas with very high tempera­tures, or used for heavy-duty applications such as towing a trailer, use
of oil with the following grade and viscosities is recommended.

API classification: SJ or SH
SAE viscosity No.: 30, 40, 10W-50, 20W-40, 20W-50

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10-11

Cooling system

WARNING

Never attempt to remove the radiator cap until the engine has
been shut off and has cooled down completely. Since the coolant
is under pressure, you may suffer serious burns from a spray of
boiling hot coolant when the cap is removed.

CAUTION

D The cooling system has been filled at the factory with a high
quality, corrosion-inhibiting, year-around coolant which provides
protection against freezing down to –33°F (–36°C). For adding,
use genuine SUBARU coolant or an equivalent: a mixture of 50%
soft water and 50% ethylene-glycol basis coolant. Use of improp­er coolants may result in corrosion in the cooling system. It is im­portant to maintain protection against freezing and corrosion,
even if freezing temperatures are not expected. Never mix differ­ent kinds of coolant.
D Do not splash the engine coolant over painted parts. The alco­hol contained in the engine coolant may damage the paint sur­face.

B Hose and connections

Your vehicle employs an electric cooling fan which is thermostatically
controlled to operate when the engine coolant reaches a specific tem­perature.
If the radiator cooling fan does not operate even when the engine
coolant temperature gauge exceeds the normal operating range, the
cooling fan circuit may be defective. Check the fuse and replace it if
necessary. If the fuse is not blown, have the cooling system checked
by your SUBARU dealer.

If frequent addition of coolant is necessary, there may be a leak in the
engine cooling system. It is recommended that the cooling system
and connections be checked for leaks, damage, or looseness.

10-12

Maintenance and service

J Engine coolant

B Checking the coolant level

Check the coolant level at each fuel stop.

“FULL”
level mark

“LOW”
level mark

HG0114

1. Check the coolant level on the outside of the reservoir while the
engine is cool.

2. If the level is close to or lower than the “LOW” level mark, add
coolant up to the “FULL” level mark. If the reserve tank is empty, re­move the radiator cap and refill as required.

Rubber gaskets

HG0115

3. After refilling the reserve tank and the radiator, reinstall the caps
and check that the rubber gaskets inside the radiator cap are in the
proper position.

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10-13

B Changing the coolant

WARNING

Never attempt to remove the radiator cap until the engine has
been shut off and has cooled down completely. Since the coolant
is under pressure, you may suffer serious burns from a spray of
boiling hot coolant when the cap is removed.

Change the engine coolant in the following procedures according to
the maintenance schedule in the “Warranty and Maintenance Book-
let”.

1. Place a proper container under the drain plug and loosen the drain
plug.

HGA000BB

2. Loosen the radiator cap to drain the coolant from the radiator. Then
drain the coolant from the reserve tank. Tighten the drain plug secure­ly.

10-14

Maintenance and service

Filler neck

Fill up to here

“FULL”
level mark

“LOW”
level mark

HG0114OM-H0197

3. Slowly pour the coolant and fill to the radiator filler neck and to the
reserve tank’s “FULL” level mark. Do not pour the coolant too quickly,
as this may lead to insufficient air bleeding and trapped air in the sys­tem.

Coolant capacity: 6.2 US qt (5.8 liters, 5.2 Imp qt)

Rubber gaskets

HG0115

4. Put the radiator cap back on and tighten firmly. At this time, make
sure that the rubber gaskets in the radiator cap are correctly in place.

5. Start and run the engine for more than five minutes at 2,000 to
3,000 rpm.

6. Stop the engine and wait until the coolant cools down (122 to
140°F [50 to 60 °C]). If there is any loss of coolant, add coolant to the
radiator’s filler neck and to the reserve tank’s “FULL” level.

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10-15

7. Put the radiator cap and reservoir cap back on and tighten firmly.

Air cleaner element

WARNING

Do not operate the engine with the air cleaner element removed.
The air cleaner element not only filters intake air but also stops
flames if the engine backfires. If the air cleaner element is not
installed when the engine backfires, you could be burned.

The air cleaner element functions as a filter screen. When the element is
perforated or removed, engine wear will be excessive and engine life
shortened.

The air cleaner element is a viscous type. It is unnecessary to clean or
wash the element.

B Replacing the air cleaner element

Replace the air cleaner element according to the maintenance sched­ule in the “Warranty and Maintenance Booklet”. Under extremely
dusty conditions, replace it more frequently. It is recommended that
you always use genuine SUBARU parts.

1. Remove the bolt securing the rear air cleaner element case.

2. Unsnap the three clamps holding the rear air cleaner element

10-16

HBA003BBHBA002BB

Maintenance and service

case.

3. Separate the rear air cleaner element case from the front air clean­er element case and remove the air cleaner element.

4. Clean the inside of the front and rear air cleaner element cases
with a damp cloth and install a new air cleaner element.

5. Insert the four projections on the rear air cleaner element case into
the slits on the front air cleaner element case and snap the three
clamps on the rear air cleaner element case and then tighten the bolt.

Spark plugs

CAUTION

D When disconnecting the spark plug cables, always grasp the
spark plug cap, not the cables.
D Make sure the cables are replaced in the correct order.

HBA004BA

It may be difficult to replace the spark plugs. It is recommended that you
have the spark plugs replaced by your SUBARU dealer.
The spark plugs should be replaced according to the maintenance
schedule in the “Warranty and Maintenance Booklet”.

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10-17