2018 SUBARU WRX cooling

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北米Model "A1700BE-B" EDITED: 2017/ 10/ 11
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, thor-
oughly flush the exposed area
with water immediately. Get med-
ical help if the fluid has entered
your eyes.
If battery fluid is accidentally
swallowed, immediately drink a
large amount of milk or water,
and obtain immediate medical
help.
Keep everyone including chil-
dren 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
discharged battery is frozen. It
could cause the battery to burst
or explode.
.Whenever working on or around a
battery, always wear suitable eyeprotectors, and remove 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 suitable condition are avail-
able.
.A running engine can be danger-
ous. 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.
.Jump starting is dangerous if it
done incorrectly. If you are un-
sure about the proper procedure
for jump starting, consult a com-
petent mechanic.
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 battery (called the
booster battery) with jumper cables.
&How to jump start1. Make sure the booster battery is 12
volts and the negative terminal is
grounded.
2. If the booster battery is in another
vehicle, do not let the two vehicles touch.
3. Turn off all unnecessary lights and
accessories.
4. Connect the jumper cables exactly in
the sequence illustrated.
In case of emergency/Jump starting
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北米Model "A1700BE-B" EDITED: 2017/ 10/ 11
Engine overheating
WARNING
Never attempt to remove the radiator
cap until the engine has been shut
off and has fully cooled down. When
the engine is hot, the coolant is
under pressure. Removing the cap
while the engine is still hot could
release a spray of boiling hot cool-
ant, which could burn you very
seriously.
If the engine overheats, safely pull off the
road and stop the vehicle in a safe
location.&If steam is coming from the
engine compartment.Turn off the engine and get everyone
away from the vehicle until it cools down.
.Contact an authorized SUBARU deal-
er.
&If no steam is coming from the
engine compartment1. Keep the engine running at idling
speed.
2. Open the engine hood to ventilate the
engine compartment. Refer to“Engine
hood”F11-9.
Confirm that the cooling fan is turning. If
the fan is not turning, immediately turn off
the engine and contact an authorized
SUBARU dealer for repair.
3. After the engine coolant temperature
has dropped, turn off the engine.Temperature gauge
1) Normal operating rangeIf temperature gauge stays in the over-
heated zone, turn off the engine. Refer to
“Temperature gauge”F3-11.4. After the engine has fully cooled down,
check the coolant level in the reserve tank.
If the coolant level is below the“LOW”
mark, add coolant up to the“FULL”mark.
NOTEFor details about how to check the
coolant level or how to add coolant,
refer to“Engine coolant”F11-17.
5. If there is no coolant in the reserve
tank, add coolant to the reserve tank. Then
remove the radiator 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 counter-
clockwise slowly without pressing down
until it stops. Release the pressure from
the radiator. After the pressure has been
fully released, remove the cap by pressing
down and turning it.
In case of emergency/Engine overheating
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北米Model "A1700BE-B" EDITED: 2017/ 10/ 11
Maintenance schedule.......................................... 11-3
Maintenance precautions..................................... 11-3
Before checking or servicing in the engine
compartment...................................................... 11-4
When checking or servicing in the engine
compartment...................................................... 11-5
When checking or servicing in the engine
compartment while the engine is running............ 11-5
Maintenance tips................................................... 11-6
Removing and reinstalling clips............................ 11-6
Engine hood.......................................................... 11-9
Engine compartment overview.......................... 11-11
STI...................................................................... 11-11
Except STI.......................................................... 11-12
Engine oil............................................................. 11-13
Engine oil consumption...................................... 11-13
Checking the oil level.......................................... 11-13
Changing the oil and oil filter.............................. 11-15
Recommended grade and viscosity..................... 11-15
Synthetic oil........................................................ 11-16
Cooling system................................................... 11-16
Cooling fan, hose and connections..................... 11-17
Engine coolant.................................................... 11-17
Air cleaner element............................................. 11-18
Replacing the air cleaner element........................ 11-19
Spark plugs......................................................... 11-21
Recommended spark plugs................................. 11-21
Drive belts........................................................... 11-21Manual transmission oil......................................11-22
Recommended grade and viscosity..................... 11-22
Continuously variable transmission fluid..........11-22
Front differential gear oil (CVT models) and
rear differential gear oil....................................11-23
Recommended grade and viscosity..................... 11-23
Power steering fluid (STI)...................................11-23
Checking the fluid level...................................... 11-23
Recommended fluid............................................ 11-24
Brake fluid............................................................11-24
Checking the fluid level...................................... 11-24
Recommended brake fluid.................................. 11-25
Clutch fluid (MT models).....................................11-25
Checking the fluid level...................................... 11-25
Recommended clutch fluid................................. 11-26
Brake booster......................................................11-26
Brake pedal..........................................................11-27
Checking the brake pedal free play..................... 11-27
Checking the brake pedal reserve distance ......... 11-27
Clutch pedal (MT models)...................................11-27
Checking the clutch function .............................. 11-27
Checking the clutch pedal free play.................... 11-28
Hill start assist system.......................................11-28
Replacement of brake pad andlining................11-28
Breaking-in of new brake pads (models with
electronic parking brake system)..................... 11-29
Breaking-in of new brake pads and linings
(models without electronic parking brake
system)........................................................... 11-29
Maintenance and service
11

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北米Model "A1700BE-B" EDITED: 2017/ 10/ 11
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 seat-
belt pretensioner system, or at-
tempt to take its connectors
apart, as that may activate the
system or it can render it inop-
erative. NEVER use a circuit tes-
ter for this wiring. If your SRS
airbag or seatbelt pretensioner
needs service, consult your near-
est SUBARU dealer.
NOTESUBARU does not endorse the use of
non-SUBARU approved flushing sys-
tems and strongly advises against
performing these services on a
SUBARU vehicle. Non-SUBARU ap-
proved flushing systems use chemi-
cals and/or solvents which have not
been tested or approved by SUBARU.
SUBARU warranties do not cover any
part of the vehicle which is damaged by
adding or applying chemicals and/or
solvents other than those approved or
recommended by SUBARU.
&Before checking or servicing
in the engine compartment
WARNING
.Always stop the engine and apply
the parking brake to prevent the
vehicle from moving.
.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 has stopped.
.Do not spill engine oil, engine
coolant, brake fluid or any other
fluid on hot engine components.
This may cause a fire.
.When the ignition switch is in the
“ON”position, the cooling fan
may operate suddenly even when
the engine is stopped. If your
body or clothes come into con-
tact with a rotating fan, that could
result in serious injury. To avoid
risk of injury, perform the follow-
ing precautions.
–Models with push-button start
system:
Always turn the push-button
ignition switch to the“OFF”
position and confirm that theoperation indicator on the
switch is turned off. Then take
the access key fob out from
the vehicle.
–Models without push-button
start system:
Always remove the key from
the ignition switch.
.Before performing any servicing
on a vehicle equipped with a
remote engine start system (a
dealer option) temporarily place
that system in the service mode
to prevent it from unexpectedly
starting the engine.
Maintenance and service/Maintenance precautions
11-4

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北米Model "A1700BE-B" EDITED: 2017/ 10/ 11
&When checking or servicing
in the engine compartment
CAUTION
.Do not contact the drive belt
cover while checking the compo-
nents in the engine compartment.
Doing so may cause your hand to
slip off the cover and result in an
unexpected injury.
.Do not touch the oil filter until the
engine has cooled down comple-
tely. Doing so may result in a burn
or other injury. Note that the oil
filter becomes very hot when the
engine is running and remains
hot for some time after the engine
has stopped.
.Do not apply force on the fender
insulator by placing your handson it, etc. Deformation of the
insulator and its mount may oc-
cur.
&When checking or servicing
in the engine compartment
while the engine is running
WARNING
A running engine can be dangerous.
Keep your fingers, hands, clothing,
hair and tools away from the cooling
fan, drive belt and any other moving
engine parts. Removing rings,
watches and ties is advisable.
Maintenance and service/Maintenance precautions
11-5
11

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北米Model "A1700BE-B" EDITED: 2017/ 10/ 11
&Synthetic oilYou must follow the oil and filter changing
intervals shown in the Warranty and
Maintenance booklet.NOTESynthetic oil of the grade and viscosity
noted in chapter 12 is the recom-
mended engine oil for optimum engine
performance. Conventional oil may be
used if synthetic oil is unavailable.
Cooling system
WARNING
.Never attempt to remove the
radiator cap until the engine has
been shut off and has cooled
down completely. Since the cool-
ant is under pressure, you may
suffer serious burns from a spray
of boiling hot coolant when the
cap is removed.
.Be careful of the rotating cooling
fan when the engine hood is
open. When the engine tempera-
ture is high, the cooling fan in the
engine compartment may oper-
ate when the ignition switch is in
the“ON”position, even if the
engine is stopped. Touching the
cooling fan while it is rotating
may result in injury.
CAUTION
.Vehicles are filled at the factory
with SUBARU Super Coolant that
does not require the first change
for 11 years/137,500 miles (11
years/220,000 km). Do not mix
this coolant with any other brandor type of coolant during this
period. Mixing with a different
coolant will reduce the life of the
coolant. Should it be necessary
to top up the coolant for any
reason, use only SUBARU Super
Coolant.
If the SUBARU Super Coolant is
diluted with another brand or
type, the maintenance interval is
shortened to that of the mixing
coolant.
.Do not splash the engine coolant
over painted parts. The alcohol
contained in the engine coolant
may damage the paint surface.
Maintenance and service/Cooling system
11-16

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北米Model "A1700BE-B" EDITED: 2017/ 10/ 11
&Cooling fan, hose and con-
nectionsYour vehicle employs an electric cooling
fan which is thermostatically controlled to
operate when the engine coolant reaches
a specific temperature.Temperature gauge
1) Normal operating rangeIf 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. Refer to“Temperature gauge”
F3-11.
Check the fuse and replace it if necessary.
Refer to“Fuses”F11-42 and“Fuses and
circuits”F12-10.
If the fuse is not blown, have the coolingsystem 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 level1)“FULL”level mark
2)“LOW”level markCheck 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 isempty, remove the radiator cap and refill
coolant up to just below the filler neck as
shown in the following illustration.
STI
1) Fill up to this level
–CONTINUED–
Maintenance and service/Cooling system
11-17
11

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北米Model "A1700BE-B" EDITED: 2017/ 10/ 11
&Fluids
Fluid
Fluid type*
1
Fluid capacity*
2
Remarks*
3
Continuously variable transmission
fluid (CVT models)Consult your SUBARU dealer. 13.1 US qt (12.4 liters, 10.9 Imp qt)“
Continuously variable transmis-
sion fluid”F11-22
Brake fluidFMVSS No. 116, DOT 3 or DOT 4 brake
fluid—“
Brake fluid”F11-24
Clutch fluid (MT models)FMVSS No. 116, DOT 3 or DOT 4 brake
fluid—“
Clutch fluid (MT models)”F11-25
Power steering fluid (STI)· SUBARU ATF
·“Dexron III”Type Automatic Transmis-
sion Fluid
· IDEMITSU ATF HP0.7 US qt (0.7 liter, 0.6 Imp qt)“
Power steering fluid (STI)”F11 -
23
*1: Use one of the indicated types of fluid.
*2: The indicated fluid quantity is only a guideline. The necessary quantity for replacement may differ slightly depending on the temperature and other
factors.
*3: For more details about maintenance and service, refer to the indicated section.&Engine coolant
Vehicle model Coolant capacity Coolant type
STI 8.2 US qt (7.7 liters, 6.8 Imp qt)
SUBARU Super Coolant
Except STIMT models 8.6 US qt (8.1 liters, 7.2 Imp qt)
CVT models8.8 US qt (8.3 liters, 7.3 Imp qt)
The indicated coolant quantity is only a guideline. The necessary quantity for replacement may differ slightly depending on the temperature and other
factors. For more details about maintenance and service, refer to“
Cooling system”F11-16.
–CONTINUED–
Specifications/Specifications
12-7
12