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IMPREZA 2006
Service Guide
52 pgs1.01 Mb0
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Subaru Impreza 2006 Service Guide

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 ......... 11-4
Engine hood ....................................................... 11-4
Engine compartment overview ......................... 11-6
Engine oil ............................................................ 11-8
Recommended grade and viscosity under
severe driving conditions .................................... 11-11
Cooling system .................................................. 11-12
Air cleaner element ............................................ 11-15
Spark plugs ......................................................... 11-17
Drive belts ........................................................... 11-18
Manual transmission oil .................................... 11-18
Automatic transmission fluid ............................ 11-20
Front differential gear oil (AT vehicles) ............ 11-21
Rear differential gear oil .................................... 11-22
Power steering fluid ........................................... 11-24
Brake fluid ........................................................... 11-25
Recommended brake fluid ..................................... 11-25
Clutch fluid (MT vehicles) .................................. 11-26
Brake booster ..................................................... 11-27
Brake pedal ......................................................... 11-27
Checking the brake pedal reserve distance ......... 11-27
Clutch pedal (MT vehicles) ................................ 11-28
Replacement of brake pad and lining ............... 11-28
Parking brake stroke .......................................... 11-29
11
Maintenance and service
Tires and wheels ................................................ 11-30
Types of tires .......................................................... 11-30
Tire inspection ........................................................ 11-30
Aluminum wheels ............................................... 11-35
Intercooler water spray (WRX-STI) ................... 11-35
Windshield washer fluid .................................... 11-36
Replacement of wiper blades ............................ 11-37
Rear window wiper blade assembly ..................... 11-38
Rear window wiper blade rubber .......................... 11-39
Battery ................................................................. 11-40
Fuses ................................................................... 11-41
Main fuse ............................................................. 11-43
Installation of accessories ................................ 11-43
Replacing bulbs .................................................. 11-44
Front turn signal light bulbs .................................. 11-48
Front fog light ......................................................... 11-48
License plate light .................................................. 11-50
Maintenance and service 11-3
Maintenance schedule
Maintenance and service
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.
Testing of an All-Wheel Drive ve­hicle must NEVER be performed on a single two-wheel dynamome­ter 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 the mate­rials in the vehicle may be hazard­ous if improperly used or handled, for example, battery acid.
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.
Always use the proper tools and make certain that they are well maintained.
Never get under the vehicle sup­ported only by a jack. Always use a safety stands to support the ve­hicle.
Never keep the engine running in a poorly ventilated area, such as a garage or other closed areas.
Do not smoke or allow open flames around the fuel or battery. This will cause a fire.
Because the fuel system is under pressure, replacement of the fuel filter should be performed only by your SUBARU dealer.
! CONTINUED !
11-4 Maintenance and service
Wear adequate eye protection to guard against getting oil or fluids in your eyes. If something does get in your eyes, thoroughly wash them out with clean water.
Do not tamper with the wiring of the SRS airbag system or seatbelt pretensioner system, or attempt to take its connectors apart, as that may activate the system or it can render it inoperative. The wir­ing and connectors of these sys­tems are yellow for easy identifi­cation. NEVER use a circuit tester for these wiring. If your SRS airbag or seatbelt pre­tensioner needs service, consult your nearest SUBARU dealer.
Before checking or servicing in the engine compartment
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.
Do not spill engine oil, engine coolant, brake fluid or any other fluid on hot engine components. This may cause a fire.
Always remove the key from the ignition switch. When the ignition switch is in the #ON$ position, the cooling fan may operate suddenly even when the engine is stopped.
When you do checking or ser­vicing in the engine compart­ment while the engine is run­ning
Engine hood
0
B00002
To open the hood:
1. If the wiper blades are lifted off the windshield, return them to their original positions.
2. Pull the hood release knob under the instrument panel.
Always stop the engine and set the parking brake firmly to pre­vent the vehicle from moving.
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.
hood prop into the slot in the hood.
To close the hood:
1. Lift the hood slightly and remove the hood prop from the slot in the hood and re­turn the prop to its retainer.
2. Lower the hood until it approaches ap­proximately 12 in (30 cm) from the closed position and let it drop.
After closing the hood, be sure the hood is securely locked.
Maintenance and service 11-5
B00447
3. Release the secondary hood release located under the front grille by moving the lever toward the left.
B00448
Lift up the hood, release the hood prop from its retainer and put the end of the
If this does not close the hood, release it from a slightly higher position. Do not push the hood forcibly to close it. It could deform the metal.
Always check that the hood is prop­erly locked before you start driving. If it is not, it might fly open while the vehicle is moving and block your view, which may cause an accident and serious bodily injury.
11-6 Maintenance and service
Engine compartment overview
Non-turbo models
1 2 3 4 5 6
1) Air cleaner element (page 11-15)
2) Manual transmission oil level gauge (MT) (page 11-18) or Differential gear oil level gauge (AT) (page 11-21)
3) Clutch fluid reservoir (page 11-26)
4) Automatic transmission fluid level gauge (page 11-20)
5) Brake fluid reservoir (page 11-25)
6) Fuse box (page 11-41)
7) Battery (page 11-40)
8) Windshield washer tank (page 11-36)
9) Engine coolant reservoir (page 11-
12)
10) Engine oil level gauge (page 11-8)
11) Engine oil filler cap (page 11-8)
12) Radiator cap (page 11-12)
13) Power steering fluid reservoir (page 11-24)
13
12
7891011
B00464
Maintenance and service 11-7
Turbo models
1 2 3 4 5 6
1) Air cleaner element (page 11-15)
2) Manual transmission oil level gauge (MT) (page 11-18) or Differential gear oil level gauge (AT) (page 11-21)
3) Automatic transmission fluid level gauge (page 11-20)
4) Clutch fluid reservoir (page 11-26)
5) Brake fluid reservoir (page 11-25)
6) Fuse box (page 11-41)
7) Battery (page 11-40)
8) Windshield washer tank (page 11-36)
9) Engine oil filler cap (page 11-8)
10) Engine coolant reservoir (page 11-
12)
11) Engine oil level gauge (page 11-8)
12) Radiator cap (page 11-12)
13) Power steering fluid reservoir (page 11-24)
78910111213
B00466
11-8 Maintenance and service
Engine oil
Checking the oil level
Check the engine oil level at each fuel stop.
1. Park the vehicle on a level surface and stop the engine.
B00467
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.
1
2
3
B00418
1) Notch
2) Upper level
3) Lower level
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.
Use only engine oil with the rec­ommended grade and viscosity.
Be careful not to spill engine oil when adding it. If oil touches the exhaust pipe, it may cause a bad smell, smoke, and/or a fire. If en­gine oil gets on the exhaust pipe, be sure to wipe it off.
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.
Changing the oil and oil filter
Change the oil and oil filter according to the maintenance schedule in the #Warran- ty 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, or when driving in extremely cold whether.
1. Warm up the engine by letting the en­gine idle for approximately 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.
Turbo models
Non-turbo models
B00449
B00450
warm. The used oil should be drained into an appropriate container and disposed of properly.
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.
6. Remove under cover.
B00451
Turbo models
Maintenance and service 11-9
B00452
Non-turbo models
7. Remove the oil filter with an oil filter
wrench.
8. Before installing a new oil filter, apply a
thin coat of engine oil to the seal.
9. Clean the rubber seal seating area of
the bottom of engine and install the oil fil­ter by hand turning. Be careful not to twist or damage the seal.
10.Tighten the oil filter by the amount indi-
cated in the following table after the seal makes contact with the bottom of engine.
4. Drain out the engine oil by removing the drain plug while the engine is still
! CONTINUED !
11-10 Maintenance and service
Oil filter color Part number
Black 15208AA100 1 rotation
White 15208AA09A
Amount of ro-
tation
2/3 ! 3/4 rota-
tion
Never over tighten the oil filter be­cause that can result in an oil leak.
Thoroughly wipe off any engine oil that has spilled over the ex­haust pipe and/or under-cover. If left unremoved, the oil could catch fire.
11.Reinstall under cover.
12.Pour engine oil through the filler neck.
Oil capacity (guideline):
4.2 US qt (4.0 liters, 3.5 Imp qt)
The oil quantity indicated above is only guideline. The necessary quantity of oil depends on the quantity of oil that has been drained. The quantity of drained oil differs slightly depending on the temperature of the oil and the time the oil is left flowing out. After
refilling the engine with oil, therefore, you must the dipstick to confirm that the level is correct.
13.Start the engine and make sure that no oil leaks appear around the filter"s rubber seal and drain plug.
14.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.
Be careful not to spill engine oil when adding it. If oil touches the ex­haust pipe, it may cause a bad smell, smoke, and/or a fire.
Recommended grade and viscosity
Oil grade:
ILSAC GF-4, which can be identified with the ILSAC certification mark (Starburst mark) or API classification SM with the words #ENERGY CONSERVING$
These recommended oil grades can be identified by looking for either or both of the following marks displayed on the oil
container.
1
V
I
R
C
E
S
I
P
A
2
E
S
SAE
5W-30
N
E
R
G
Y
C
N
3
API Service label
1) Indicates the oil quality by API designa­tions
2) Indicates the SAE oil viscosity grade
3) Indicates that the oil has fuel saving ca­pabilities
O
R
G
N
I
V
B00446
-30 -20 -10 0 10 20 30 40
-20 0 6020 80 10040
5W-30*
Maintenance and service 11-11
eas 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 SM (or SL):
SAE viscosity No.: 30, 40, 10W-50, 20W-40, 20W-50
B00014
ILSAC Certification Mark (Starburst Mark)
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.
10W-30, 10W-40
B00522
SAE viscosity No. and applicable tem­perature
*: 5W-30 is recommended.
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.
Use only engine oil with the recom­mended grade and viscosity.
Recommended grade and viscosity under severe driv­ing conditions
If the vehicle is used in desert areas, in ar-
Synthetic oil
You can use synthetic engine oil that meets the same requirements given for conventional engine oil. When using syn­thetic oil, you must use oil of the same classification, viscosity and grade shown in this owner"s manual, and must follow the oil and filter changing intervals shown in the maintenance schedule.
11-12 Maintenance and service
Cooling system
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.
The cooling system has been filled at the factory with a high quality, corrosion-inhibiting, year­around coolant which provides protection against freezing down to "33F ("36C). 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.
Do not splash the engine coolant over painted parts. The alcohol contained in the engine coolant may damage the paint surface.
Cooling fan, 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.
Engine coolant
Checking the coolant level
FUL L
LOW
1) #FULL$ level mark
2) #LOW$ level mark
Check the coolant level at each fuel stop.
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.
1
2
B00468
Maintenance and service 11-13
B00018
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.
Be careful not to spill engine cool­ant when adding it. If coolant touches the exhaust pipe, it may cause a bad smell, smoke, and/or a fire. If engine coolant gets on the exhaust pipe, be sure to wipe it off.
Do not splash the engine coolant over painted parts. The alcohol contained in the engine coolant may damage the paint surface.
Changing the coolant
B00019
Always add genuine Subaru cooling sys­tem conditioner whenever the coolant is replaced. Change the engine coolant and add gen­uine Subaru cooling system conditioner using the following procedures according to the maintenance schedule.
1. Remove the under cover.
2. Place a proper container under the drain plug and loosen the drain plug.
3. Loosen the radiator cap to drain the coolant from the radiator. Then drain the coolant from the reserve tank. Tighten the drain plug securely.
NOTE (Turbo model only)
The cap (without tabs) on top of the ra­diator does not need to be removed. To
add coolant, remove the cap (with tabs) on the coolant tank on top of the en­gine.
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.
4. Install the under cover.
1
2
B00453
Non-turbo models
1) Filler neck
2) Fill up to this level
! CONTINUED !
11-14 Maintenance and service
1
2
Turbo models
1) Filler neck
2) Fill up to this level
B00454
5. Slowly pour the coolant and fill up to just below the filler neck, allowing enough room to add genuine Subaru cooling sys­tem conditioner in the radiator. Add genu­ine Subaru cooling system conditioner un­til the coolant level reaches the filler neck. Do not pour the coolant too quickly, as this may lead to insufficient air bleeding and trapped air in the system.
Guideline of coolant quantity (including cool­ant in reservoir tank):
Non-turbo models:
MT. 7.4 US qt (7.0 liters, 6.2 Imp qt) AT. 7.3 US qt (6.9 liters, 6.1 Imp qt)
Turbo models:
MT. 8.1 US qt (7.7 liters, 6.8 Imp qt) AT. 8.0 US qt (7.6 liters, 6.7 Imp qt)
FUL L
LOW
1) #FULL$ level mark
2) #LOW$ level mark
1
2
B00468
Be careful not to spill engine cool­ant when adding it. If coolant touches the exhaust pipe, it may cause a bad smell, smoke, and/or a fire. If engine coolant gets on the exhaust pipe, be sure to wipe it off.
Do not splash the engine coolant over painted parts. The alcohol contained in the engine coolant may damage the paint surface.
6. Pour the coolant and fill to the reservoir tank"s #FULL$ level mark.
B00018
1) Rubber gaskets
7. Put the radiator cap back on and tight-
Maintenance and service 11-15
en firmly. At this time, make sure that the rubber gasket in the radiator cap is cor­rectly in place.
8. Start and run the engine for more than five minutes at 2,000 to 3,000 rpm.
9. Stop the engine and wait until the cool­ant cools down (122 to 140F [50 to 60C]). If there is any loss of coolant, add coolant to the radiator"s filler neck and to the reserve tank"s #FULL$ level.
10.Put the radiator cap and reservoir cap back on and tighten firmly.
Air cleaner element
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.
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.
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.
Turbo models
B00024
1. Unsnap the two clamps holding the air cleaner case cover.
B00025
2. Open the air cleaner case cover and remove the air cleaner element.
! CONTINUED !
11-16 Maintenance and service
3. Clean the inside of the air cleaner cov­er and case with a damp cloth and install a new air cleaner element.
B00026
4. To install the air cleaner case cover, in­sert the two projections on the air cleaner case cover into the slits on the air cleaner case and then snap the two clamps on the air cleaner case cover.
Non-turbo models
B00361
1. Unsnap the two clamps holding the air cleaner case cover.
ing.
1
2
B00363
1) Air cleaner case cover
2) Air cleaner element
3. Open the air cleaner case cover and remove the air cleaner element.
4. Clean the inside of the air cleaner cov­er and case with a damp cloth and install a new air cleaner element.
B00362
2. Push the air cleaner case cover in the direction of the arrow shown in the draw-
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