Trans SUBARU IMPREZA 2006 2.G Workshop Manual

11-18 Maintenance and service
Drive belts
1) Power steering pump pulley
2) Air conditioner compressor pulley
3) Crank pulley
The alternator, power steering pump, and
air conditioner compressor depend on
drive belts. Satisfactory performance re-
quires that belt tension be correct.
To check belt tension, place a straight-
edge (ruler) across two adjacent pulleys
and apply a force of 22 lbs (98 N, 10 kg)
midway between the pulleys by using a
spring scale. Belt deflection should be the
amount specified. If a belt is loose,
cracked, or worn, contact your SUBARU
dealer.
in (mm)Manual transmission oil
Checking the oil level
5-speed transmission (Non-turbo model)
1) Yellow handle
A
B
2
3
1
B00365
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)
1
B00465

Maintenance and service 11-19
5-speed transmission (Turbo model)
6-speed transmission
1. Park the vehicle on a level surface and
stop the engine. 2. Pull out the dipstick, wipe it clean, and
insert it again.
1) Upper level
2) Lower level
3. Pull out the dipstick again and check
the oil level on it. If it is below the lower
level, add oil through the dipstick hole to
bring the level up to the upper level.
Recommended grade and
viscosity
Each oil manufacturer has its own base
oils and additives. Never use different
brands together.
Oil grade:
API classification GL-5
SAE viscosity No. and applicable tem-
perature
B00469
B00470
Be careful not to spill manual trans-
mission oil when adding it. If oil
touches the exhaust pipe, it may
cause a bad smell, smoke, and/or a
fire. If oil gets on the exhaust pipe,
be sure to wipe it off.
L F
F
L1
2 1
2
B00368
-30 -20 -10 0 10 20 30 40-20 0 60 20
80W
75W/90 80 100
40
85W 90
B00032

11-20 Maintenance and service
Automatic transmission fluid
Checking the fluid level
The automatic transmission fluid expands
largely as its temperature rises; the fluid
level differs according to fluid tempera-
ture. Therefore, there are two different
scales for checking the level of hot fluid
and cold fluid on the dipstick.
Though the fluid level can be checked
without warming up the fluid on the“COLD ” range, we recommend checking
the fluid level when the fluid is at operating
temperature.
Checking the fluid level when the
fluid is hot
1. Drive the vehicle several miles to raise
the temperature of the transmission fluid
up to normal operating temperature; 158
to 176 F (70 to 80 C) is normal.
2. Park the vehicle on a level surface and
set the parking brake.
3. First shift the selector lever in each po-
sition. Then shift it in the “P ” position, and
run the engine at idling speed.
1) Yellow handle
A) HOT range
B) COLD range
1) Upper level
2) Lower level
4. Pull out the dipstick and check the fluid
level on the gauge. If it is below the lower
level on the “HOT ” range, add the recom-
mended automatic transmission fluid up to
the upper level.
Checking the fluid level when the
fluid is cold
When the fluid level has to be checked
without time to warm up the automatic
transmission, check to see that the fluid
level is between the lower level and upper
level on the “COLD ” range. If it is below
that range, add fluid up to the upper level.
Be careful not to overfill.
1
B00471
3 4
34 2
1
B00370
Be careful not to spill automatic
transmission fluid when adding it. If
automatic transmission fluid touch-
es the exhaust pipe, it may cause a
bad smell, smoke, and/or a fire. If au-
tomatic transmission fluid gets on
the exhaust pipe, be sure to wipe it
off.

Maintenance and service 11-21
– CONTINUED –
Recommended fluid
Use one of the following types of automat-
ic transmission fluid.
Genuine Subaru Automatic Transmis-
sion Fluid Type-HP
IDEMITSU ATF HP
Castrol Transmax J
Pennzoil ATF-J*
* Available only in the USA (except
Alaska and Hawaii)
NOTE
Using any non-specified type of auto-
matic transmission fluid could result in
damage inside the transmission. When
replacing the automatic transmission
fluid, be sure to use a fluid of the types
specified above.
Front differential gear oil (AT
vehicles)
Checking the oil level
1) Yellow handle
1. Park the vehicle on a level surface and
stop the engine.
2. Pull out the dipstick, wipe it clean, and
insert it again.
1) Upper level
2) Lower level
3. 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 up-
per level.
1
B00472
Be careful not to spill front differen-
tial gear oil when adding it. If oil
touches the exhaust pipe, it may
cause a bad smell, smoke, and/or a
fire. If oil gets on the exhaust pipe,
be sure to wipe it off.
1 2
B00372

11-24 Maintenance and service
Power steering fluid
Checking the fluid level
1) Reservoir tank
The power steering fluid expands greatly
as its temperature rises; the fluid level dif-
fers according to fluid temperature. There-
fore, the reservoir tank has two different
checking ranges for hot and cold fluids.
Check the power steering fluid level
monthly.
1. Park the vehicle on a level surface, and
stop the engine.
1) Specified range
2. Check the fluid level of the reservoir
tank.
When the fluid is hot after the vehicle has
been run: Check that the oil level is be-
tween “HOT MIN ” and “HOT MAX ” on the
surface of the reservoir tank.
When the fluid is cool before the vehicle is
run: Check that the oil level is between “ COLD MIN ” and “COLD MAX ” on the sur-
face of the reservoir tank.
3. If the fluid level is lower than the appli-
cable “MIN ” line, add the recommended
fluid as necessary to bring the level be-
tween the “MIN ” and “MAX ” line.
If the fluid level is extreme low, it may indi-
cate possible leakage. Consult your
SUBARU dealer for an inspection.
Recommended fluid
“ Dexron III ” Type Automatic Transmis-
sion Fluid
1
1
B00376
Be careful not to burn yourself be-
cause the fluid may be hot.
When power steering fluid is be-
ing added, use only clean fluid,
and be careful not to allow any dirt
into the tank. And never use dif-
ferent brands together.
Avoid spilling fluid when adding it
in the tank.
Be careful not to spill power steer-
ing fluid when adding it. If power
steering fluid touches the exhaust
pipe, it may cause a bad smell,
smoke, and/or a fire. If power
steering fluid gets on the exhaust
pipe, be sure to wipe it off.

11-28 Maintenance and service
Clutch pedal (MT vehicles)
Check the clutch pedal free play and re-
serve distance according to the mainte-
nance schedule in the “Warranty and
Maintenance Booklet ”.
Checking the clutch function
Check the clutch engagement and disen-
gagement.
1. With the engine idling, check that there
are no abnormal noises when the clutch
pedal is depressed, and that shifting into
1st or reverse feels smooth.
2. Start the vehicle by releasing the pedal
slowly to check that the engine and trans-
mission 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 specifi-
cation, contact your SUBARU dealer.
Replacement of brake pad
and lining
The right front disc brake and the right rear
disc brake have audible wear indicators
on the brake pads. If the brake pads wear
close to their service limit, the wear indica-
tor makes a very audible scraping noise
when the brake pedal is applied.
If you hear this scraping noise each time
you apply the brake pedal, have the brake
pads serviced by your SUBARU dealer as
soon as possible.
1
B00377
700040

12-2 Specifications
SpecificationsSpecifications
These specifications are subject to change without notice .
Dimensions
in (mm)
*1: Measured with vehicle empty
AT: Automatic transmission
MT: Manual transmission
ItemSedanWagon
2.5-liter
non-turbo2.5-liter turbo2.5-liter non-turbo2.5-liter turbo
2.5iWRXWRX-STI2.5iOUTBACK SPORTWRX
Drive systemAWD
Transmission typeATMTATMTMTATMTATMTATMT
Overall length175.8 (4,465)
Overall
widthSedan68.5 (1,740)–
Wagon–66.7 (1,695)67.3 (1,710)66.7 (1,695)
Overall
heightWithout
roofrail56.7 (1,440)56.3 (1,430)57.7 (1,465)58.1 (1,475)57.7 (1,465)
With roofrail–58.5 (1,485)58.9 (1,495)58.5 (1,,485)
Wheel base99.4 (2,525)100 (2,540)99.4 (2,525)
TreadFront58.5 (1,485)58.7 (1,490)57.7 (1,465)57.5 (1,460)57.7 (1,465)
Rear58.1 (1,475)58.3 (1,480)58.9 (1,495)57.3 (1,455)
Ground clearance *16.3 (160)6.3 (160)5.7 (145)6.3 (160)6.7 (170)6.3 (160)

Specifications 12-3
– CONTINUED –
Engine
Electrical system
AT: Automatic transmission
MT: Manual transmission
Engine modelEJ253
(2.5-liter, SOHC, non-turbo)EJ255
(2.5-liter, DOHC, turbo, WRX)EJ257
(2.5-liter, DOHC, turbo, WRX-STI)
Engine typeHorizontally opposed, liquid cooled 4 cylinder, 4-s troke gasoline engine
Displacement cc (cu-in)2,457 (150)
Bore Stroke in (mm)3.9  3.1 (99.5  79.0)
Compression ratio10.0 : 18.4 : 18.2 : 1
Firing order1 – 3 – 2 – 4
Battery type and capacity (5HR)MT12V-48AH (55D23L)
AT12V-52AH (75D23L)
AlternatorWRX12V-110A
Except WRX12V-90A
Spark plugsNon-turbo engineFR5AP-11 (NGK)
Turbo engineILFR6B (NGK)

12-4 Specifications
Capacities
AT: Automatic transmission
MT: Manual transmission
Tires
Fuel tank15.9 US gal (60 liters, 13.2 Imp gal)
Engine oil4.2 US qt (4.0 liters, 3.5 Imp qt)
Transmission oil (MT)5-speed3.7 US qt (3.5 liters, 3.1 Imp qt)
6-speed4.3 US qt (4.1 liters, 3.6 Imp qt)
AT differential gear oil1.3 US qt (1.2 liters, 1.1 Imp qt)
Rear differential gear oilWRX-STI1.1 US qt (1.0 liters, 0.9 Imp qt)
Others0.8 US qt (0.8 liters, 0.7 Imp qt)
Transmission oil (AT)10.0 US qt (9.5 liters, 8.4 Imp qt)
Power steering fluid0.7 US qt (0.7 liter, 0.6 Imp qt)
Engine coolantNon-turbo engineMT7.4 US qt (7.0 liters, 6.2 Imp qt)
AT7.3 US qt (6.9 liters, 6.1 Imp qt)
Turbo engineMT8.1 US qt (7.7 liters, 6.8 Imp qt)
Item2.5i, OUTBACK SPORTWRXWRX-STI
Tire sizeP205/55R16 89V215/45R17 91W225/45R17 90W
Wheel size16  6 1
/2 JJ17
 7 JJ17  8 JJ
PressureFront33 psi (230 kPa, 2.3 kgf/cm 2
)33 psi (230 kPa, 2.3 kgf/cm 2
)36 psi (250 kPa, 2.5 kgf/cm 2
)
Rear30 psi (210 kPa, 2.1 kgf/cm 2
)32 psi (220 kPa, 2.2 kgf/cm 2
)30 psi (210 kPa, 2.1 kgf/cm 2
)
Temporary spare tireSizeT135/70 D16T135/70 D17
Pressure60 psi (420 kPa, 4.2 kgf/cm 2
)

12-8 Specifications
Fuse panel located in the engine compartment
A) FWD socket (AT models except Turbo)
B) Main fuse
C) Engine sensor (Non-turbo models)
1 3
A
B
9
6
5
7
C
312
4 8
1 0 11 1 2
C00107
Fuse panelFuse ratingCircuit
120ARadiator cooling fan (Main)
220ARadiator cooling fan (Sub)
330AABS motor
420ARear window defogger
515AHazard warning flasher
Horn
615ATurn signal lights
710AAutomatic transmission control unit
810AAlternator
915AHeadlight (right side)
1015AHeadlight (left side)
1120ALighting switch
1220AClock
Interior light
1310ASecondary air combination valve
(Turbo models only)