engine coolant SUBARU IMPREZA 2007 3.G User Guide

11-6Maintenance and service
Engine compartment overview &Non-turbo models1) Air cleaner element (page 11-15)
2) Manual transmission oil level gauge (MT)
(page 11-19) 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 11-42)
7) Battery (page 11-41)
8) Windshield washer tank (page 11-36)
9) Engine coolant reservoir (page 11-13)
10) Engine oil level gauge (page 11-8)
11) Engine oil filler cap (page 11-8)
12) Radiator cap (page 11-13)
13) Power steering fluid reservoir (page 11- 24)

&Turbo models1) Air cleaner element (page 11-15)
2) Manual transmission oil level gauge (MT)
(page 11-19) 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 11-42)
7) Battery (page 11-41)
8) Windshield washer tank (page 11-36)
9) Engine oil filler cap (page 11-8)
10) Engine coolant reservoir (page 11-13)
11) Engine oil level gauge (page 11-8)
12) Radiator cap (page 11-13)
13) Power steering fluid reservoir (page 11- 24)Maintenance and service
11-7

11-12Maintenance and service
&Recommended grade and
viscosity under severe driv-
ing 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 SM (or SL): SAE viscosity No.: 30, 40, 10W-50,
20W-40, 20W-50
& 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. Cooling system
WARNING
Never attempt to remove the radia-
tor 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 boil-
ing hot coolant when the cap isremoved.
CAUTION
. The cooling system has been
filled at the factory with a high
quality, corrosi on-inhibiting,
year-around coolant which pro-
vides protection against freezing
down to 33 8F( 36 8C). For add-
ing, use genuine SUBARU cool-
ant or an equivalent: a mixture of
50% soft water (or clear and
drinkable water) and 50% phos-
phate or non-amine type coolant.
Use of improper coolants may
result in corrosion in the cooling
system. It is important to main-
tain protection against freezing
and corrosion, even if freezing temperatures are not expected.
Never mix different kinds of cool-ant.
. 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 con- nections
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 tempera-
ture 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 neces-
sary, 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
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.
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.
CAUTION
. 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
WARNING
Never attempt to remove the radia-
tor 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 boil-
ing hot coolant when the cap isremoved.
Always add genuine Subaru cooling sys-
tem conditioner whenever the coolant isreplaced.
Change the engine coolant and add
genuine Subaru cooling system condi-
tioner using the following procedures Maintenance and service
11-13
– CONTINUED –

11-14Maintenance and service
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 theengine.
4. Install the under cover.
Non-turbo models
1) Filler neck
2) Fill up to this level
Turbo models
1) Filler neck
2) Fill up to this level
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 condi-
tioner 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)
1) “FULL ”level mark
2) “LOW ”level mark
CAUTION
. 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 reser-
voir tank ’s “FULL ”level mark.
1) Rubber gaskets
7. Put the radiator cap back on and
tighten 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 140
8F [50 to
60 8C]). 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 perfo-
rated 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 theelement.
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.
& Replacing the air cleaner element
Replace the air cleaner element according
to the maintenance schedule in the“ Warranty and Maintenance Booklet ”. Un-
der extremely dusty conditions, replace it
more frequently. It is recommended that
you always use genuine SUBARU parts. Maintenance and service
11-15
– CONTINUED –

Washer fluid level gauge
Remove the washer tank filler cap, then
check the fluid level indicated by the level
gauge (attached to the inside of the cap).
If the level is near the“Low ”mark, add
fluid until it reaches the “Hi ”level on the level gauge or the
“FULL ”mark on the
tank.
Use windshield washer fluid. If windshield
washer fluid is unavailable use clean
water.
In areas where water freezes in winter,
use an anti-freeze type windshield washer
fluid. SUBARU Windshield Washer Fluid
contains 58.5% methyl alcohol and 41.5%
surfactant, by volume. Its freezing tem-
perature varies according to how much it
is diluted, as indicated in the followingtable.
Washer Fluid
Concentration Freezing
Temperature
30% 10.48F( 12 8C)
50% 48F( 20 8C)
100% 49 8F( 45 8C)
CAUTION
Never use engine coolant as washer
fluid because it could cause paintdamage.
In order to prevent freezing of washer
fluid, check the freezing temperatures in
the table above when adjusting the fluid
concentration to the outside temperature.
If you fill the reservoir tank with a fluid with a different concentration from the one
used previously, purge the old fluid from
the piping between the reservoir tank and
washer nozzles by operating the washer
for a certain period of time. Otherwise, if
the concentration of the fluid remaining in
the piping is too low for the outside
temperature, it may freeze and block thenozzles.
CAUTION
Adjust the washer fluid concentra-
tion appropriately for the outside
temperature. If the concentration is
inappropriate, sprayed washer fluid
may freeze on the windshield and
obstruct your view, and the fluid
may freeze in the reservoir tank. Maintenance and service
11-37

12-4Specifications
&Capacities
Fuel tank 15.9 US gal (60 liters, 13.2 Imp gal)
Engine oil 4.2 US qt (4.0 liters, 3.5 Imp qt)
Transmission oil (MT) 5-speed 3.7 US qt (3.5 liters, 3.1 Imp qt)
6-speed 4.3 US qt (4.1 liters, 3.6 Imp qt)
Front differential gear oil (AT) 1.3 US qt (1.2 liters, 1.1 Imp qt)
Rear differential gear oil WRX-STI 1.1 US qt (1.0 liters, 0.9 Imp qt)
Others 0.8 US qt (0.8 liters, 0.7 Imp qt)
Transmission fluid (AT) 10.0 US qt (9.5 liters, 8.4 Imp qt)
Power steering fluid 0.7 US qt (0.7 liter, 0.6 Imp qt)
Engine coolant Non-turbo engine MT7.4 US qt (7.0 liters, 6.2 Imp qt)
AT 7.3 US qt (6.9 liters, 6.1 Imp qt)
Turbo engine MT 8.1 US qt (7.7 liters, 6.8 Imp qt)
AT 8.0 US qt (7.6 liters, 6.7 Imp qt)
AT: Automatic transmission
MT: Manual transmission

14-4Index
Driver ’s Control Center Differential ............................... 7-12
Auto indicator light ................................................. 3-20
Indicator light ......................................................... 3-21
Driving All-Wheel Drive vehicle ........................................... 3-19
Car phone/cell phone .................................................. 7
Drinking ..................................................................... 6
Drugs ........................................................................ 6
Foreign countries ..................................................... 8-4
Pets .......................................................................... 7
Snowy and icy roads ................................................ 8-9
Tips........................................................ 7-10, 7-12, 8-5
Tired or sleepy. ........................................................... 7
E
Electrical system ........................................................ 12-3
Electronic Brake Force Distribution (EBD) system ........................................................... 3-18, 7-23
Emergency Locking Retractor (ELR) ............................. 1-11
Engine Compartment overview ........................................... 11-6
Coolant ................................................................ 11-13
Exhaust gas (Carbon monoxide) ............................ 6, 8-2
Hood .................................................................... 11-4
Oil........................................................................ 11-8Overheating .......................................................... 9-11
Starting ................................................................... 7-7
Stopping ................................................................. 7-8
Exterior care .............................................................. 10-2 F
Flat tires
..................................................................... 9-4
Floor mat .................................................................... 6-9
Fluid level Automatic transmission ......................................... 11-20
Brake .................................................................. 11-25
Clutch ................................................................. 11-26
Power steering ..................................................... 11-24
Front
Differential gear oil ................................................ 11-21
Fog light .............................................................. 11-49
Seatbelt pretensioners ............................................ 1-19
Seats ..................................................................... 1-2
Turn signal light .................................................... 11-49
Fuel ........................................................................... 7-2
Economy hints ........................................................ 8-2
Filler lid and cap ...................................................... 7-4
Gauge ............................................................ 3-8, 3-12
Requirements ......................................................... 7-2
Fuses ..................................................................... 11-42
Fuses and circuits ...................................................... 12-6
G
GAWR (Gross Axle Weight Rating) ............................... 8-14
Glove box ................................................................... 6-4
GVWR (Gross Vehicle Weight Rating) ... ........................ 8-14
H
Hazard warning flasher .......................................... 3-6, 9-2
Head restraint adjustment ............................................. 1-4
Rear ...................................................................... 1-7