2018 SUBARU WRX Owners Manual

(510,1)
北米Model "A1700BE-B" EDITED: 2017/ 10/ 11
&Except STI
1) Brake fluid reservoir/Clutch fluid reservoir
(MT models) (page 11-24)
2) Fuse box (page 11-42)
3) Battery (page 11-41)
4) Windshield washer tank (page 11-38)
5) Engine oil filler cap (page 11-13)
6) Engine coolant reservoir (page 11-17)
7) Radiator cap (page 11-17)
8) Engine oil filter (page 11-15)
9) Engine oil level gauge (page 11-13)
10) Air cleaner case (page 11-18)
Maintenance and service/Engine compartment overview
11-12

(511,1)
北米Model "A1700BE-B" EDITED: 2017/ 10/ 11
Engine oil
CAUTION
.If the level gauge is not pulled out
easily, twist the level gauge right
and left, then pull it out. Other-
wise, you may be injured acci-
dentally straining yourself.
.Use only engine oil with the
recommended grade and vis-
cosity.
.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.&Engine oil consumptionSome engine oil will be consumed while
driving. The rate of consumption can be
affected by such factors as transmission
type, driving style, terrain and tempera-
ture. Under the following conditions, oil
consumption can be increased and thus
require refilling between maintenance in-
tervals:
.When the engine is new and within the
break-in period.When the engine oil is of lower quality
.When the incorrect oil viscosity is used
.When engine braking is employed
(repeatedly)
.When the engine is operated at high
engine speeds (for extended periods of
time)
.When the engine is operated under
heavy loads (for extended periods of time)
.When the engine idles for extended
periods of time
.When the vehicle is operated in stop
and go and/or heavy traffic situations
.When the vehicle is used under severe
thermal conditions
.When the vehicle accelerates and
decelerates frequently
Under these or similar conditions, you
should check your oil at least every 2nd
fuel fill-up and change your engine oil more
frequently. Different drivers in the same
car may experience different results. If
your oil consumption rate is greater than
expected, contact your authorized
SUBARU retailer who may perform a test
under controlled conditions.
&Checking the oil level1. Park the vehicle on a level surface and
stop the engine. 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.STI
1) Oil level gauge
2) Oil filler cap
–CONTINUED–Maintenance and service/Engine oil
11-13
11

(512,1)
北米Model "A1700BE-B" EDITED: 2017/ 10/ 11
Except STI
1) Oil level gauge
2) Oil filler cap
3) Oil filter
CAUTION
If the level gauge is not pulled out
easily, twist the level gauge right and
left, then pull it out. Otherwise, you
may be injured accidentally strain-
ing yourself.
2. Pull out the level gauge, wipe it clean,
and insert it again.
3. Be sure the level gauge is correctly
inserted until it stops.
STI
1) Notch
2) Full level
3) Low level
4) Approximately 1.1 US qt (1.0 liter, 0.9 Imp
qt) from low level to full level
Except STI
1) Full level
2) Low level
3) Approximately 1.1 US qt (1.0 liter, 0.9 Imp
qt) from low level to full level4. Pull out the oil level gauge again.
5.STI:
Check the oil level on the gauge. If the oil
level is below the low level mark, add oil so
that the full level is reached.
Except STI:
Check the oil levels on both sides of the
level gauge. Judge the engine oil level by
the lowest of the two levels. If the oil level is
below the low level mark, add oil so that
the full level is reached.
Maintenance and service/Engine oil
11-14

(513,1)
北米Model "A1700BE-B" EDITED: 2017/ 10/ 11
CAUTION
.For models except STI, be careful
not to touch the engine oil filter
when removing the oil filler cap.
Doing so may result in a burn, a
pinched finger, or may cause
some other injury.
.Use only engine oil with the
recommended grade and vis-
cosity.
.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.
To add engine oil, remove the engine oil
filler cap and slowly pour engine oil
through the filler neck. After pouring oil
into the engine, you must use the level
gauge to confirm that the oil level is
correct.
For models STI, 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.
NOTETo 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 filterChange the oil and oil filter according to
the maintenance schedule in the“War-
ranty 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 ex-
tremely cold weather.NOTE.Changing the engine oil and oil filter
should be performed by a well-trained
expert. Contact your SUBARU dealer
for changing the engine oil and oil filter.
Fully trained mechanics are on standby
at a SUBARU dealer to utilize the
special tools, spare parts and recom-
mended oil for this work, and also, used
oils are properly disposed of.
.If performing oil replacement your-
self, observe the local regulations and
dispose of waste oil properly.
&Recommended grade and
viscosity
CAUTION
Use only engine oil with the recom-
mended grade and viscosity.
Refer to“Engine oil”F12-4.NOTEEngine 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 en-
gine.
–CONTINUED–
Maintenance and service/Engine oil
11-15
11

(514,1)
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

(515,1)
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

(516,1)
北米Model "A1700BE-B" EDITED: 2017/ 10/ 11
Except STI
1) Fill up to this level3. After refilling the reserve tank and the
radiator, reinstall the cap 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
It may be difficult to change the coolant.
Have the coolant changed by your
SUBARU dealer if necessary.
Have the coolant changed according to the
maintenance schedule in the“Warranty
and Maintenance Booklet”.
Air cleaner element
WARNING
Do not operate the engine with the
air cleaner element removed. The air
cleaner element not only filters in-
take 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.
CAUTION
When replacing the air cleaner ele-
ment, use a genuine SUBARU air
cleaner element. If it is not used,
there is the possibility of causing a
negative effect to the engine.
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.
It is not necessary to clean or wash the air
cleaner element.
Maintenance and service/Air cleaner element
11-18

(517,1)
北米Model "A1700BE-B" EDITED: 2017/ 10/ 11
&Replacing the air cleaner ele-
mentReplace the air cleaner element according
to the maintenance schedule in the“War-
ranty and Maintenance Booklet”. Under
extremely dusty conditions, replace it
more frequently. It is recommended that
you always use genuine SUBARU parts.
!TYPE RANOTEIt may be difficult to replace the air
cleaner element. Have the air cleaner
element replaced by your SUBARU
dealer if necessary.
!STI except TYPE RA1. Use a screwdriver to undo the clips on
the air intake duct, then remove the airintake duct.
1) Connector cable
2) Guides
3) Clips2. Remove the connector cable from the
guides of the air cleaner case.3. Unsnap the two clips holding the air
cleaner case cover.
4. Open the air cleaner case and remove
the air cleaner element.
5. Clean the inside of the air cleaner case
and case cover with a damp cloth and
install a new air cleaner element.
6. Install the removed or loosened parts
in the reverse order of removal.
–CONTINUED–
Maintenance and service/Air cleaner element
11-19
11