cooling SUBARU BRZ 2023 User Guide

Maintenance Precautions
340NOTESUBARU does not endorse the use of
non-SUBARU approved flushing sys-
tems and strongly advises against per-
forming these services on a SUBARU
vehicle. Non-SUBARU approved flush-
ing systems use chemicals and/or sol-
vents which have not been tested or
approved by SUBARU. SUBARU war-
ranties do not cover any part of the
vehicle which is damaged by adding or
applying chemicals and/or solvents
other than those approved or recom-
mended by SUBARU.
■ Before Checking or
Servicing in the Engine
Compartment
■When Checking or Servicing
in the Engine Compartment
Do not tamper wi th 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. NEVER
use a circuit tester for these
wiring. If your SRS airbag or
seatbelt pretensioner needs
service, consult your nearest
SUBARU dealer. Check the inside of the engine
compartment to see if there are
any cloths and tools left. If they
are left inside, they may be a
cause of malfunction and fire.
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 is 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
contact with a rotating fan, that
could result in serious injury. To
avoid risk of injury, always turn
the push-button i gnition switch to
the “OFF” position and confirm
that the operation indicator on
the switch is turn ed off. Then take
the access key fob out from the
vehicle.
 Before performing any servicing
on a vehicle equipped with a
remote engine start system
temporarily place that system in
the service mode to prevent it
from unexpectedly starting the
engine.
B02092
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Maintenance Tips
341
Maintenance and Service11
– CONTINUED –
■When Checking or Servicing
in the Engine Compartment
While the Engine Is Running
11-3. Maintenance TipsSome clips and fender linings must be
removed before replacing the air cleaner
element or specific bulbs.■ Removing and Reinstalling
Clips▼ Removing clips
There are several types of clips used for
your vehicle.
▽Type A and D clipsType A clips Type D clips
1. Turn the clips co
unterclockwise using
a flat-head screwdriver until the center
portion of the clip is raised.
2. Remove the clips with a flat-head
screwdriver using leverage.
CAUTION
 Do not contact the belt cover
while checking the components
in the engine compartment.
Doing so may cause your hand to
slip off the belt cover and result in
an unexpected injury. Do not touch the o il filter until the
engine has cooled down
completely. 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 so me time after
the engine has stopped.
WARNING
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.
B01036
B01536
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Cooling System
348■Synthetic OilYou should 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. Refer to "Engine
Oil" P381. Also, you 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.
11-7. Cooling System
■ Cooling Fan, Hose and
ConnectionsYour vehicle employs an electric cooling
fan which is thermost atically 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. Refer to "Engine Coolant
Temperature Gauge"  P129.
WARNING
Never 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.
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). This
coolant should not be mixed with
any other brand or type of coolant
during this period. Mixing with a
different coolant will reduce the
life of the coolant. When neces-
sary to top off 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.
B02099
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Cooling System
349
Maintenance and Service11
– CONTINUED –
Check the fuse and replace it if necessary.
Refer to "Fuses" P371. If the fuse is not
blown, have the cooling system checked
by your SUBARU dealer.
If the frequent addition of coolant is neces-
sary between vehicle service visits, it is
recommended that you have your vehicle
inspected by an authorized SUBARU
dealer to check for leaks, damage, or
looseness.■ Engine Coolant▼ Checking the coolant level1) “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
coolant up to just below the filler neck as
shown in the following illustration.
1) Fill up to this level.
3. After refilling the reserve tank and the
radiator, reinstall t he cap and check that
the rubber gaskets in side the radiator cap
are in the proper position.
12B02100
1
B02101
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.
B00018
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Specifications
384*1: Use one of the indicated types of fluid.
*2: The indicated fluid quantity is only a guideline. The necessary quantity for replacem ent may differ slightly depending on the temperature and other
factors.
*3: For more details about maintenance and service, refer to the indicated section.■ Engine CoolantThe indicated coolant quantity is only a guideline. The necessa ry quantity for replacement may differ slightly depending on the
temperature and other factors. For more details abou t maintenance and service, refer to "Cooling System" P348.
Vehicle model Coolant capacity Coolant type
AT models 8.1 US qt (7.7 liters, 6.8 Imp qt)
SUBARU SUPER COOLANT
MT models 7.8 US qt (7.4 liters, 6.5 Imp qt)
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Index
412ChimeLight .................................................................................P174
Seatbelt ...........................................................................P131
Cleaning
Alloy wheels............. ........................................................P333
Center information display ...............................................P336
Interior .............................................................................P335
Ventilation grille ...............................................................P204
Climate control system .........................................................P198 Automatic.........................................................................P200
Manual .............................................................................P201
Clock ....................................................................................P172
Clutch Fluid ...................................................................... P354, P383
Pedal ...............................................................................P356
Combination meter display (color TFT) ................................P151 Audio system-linked disp lay ............................................P156
Drive information .............................................................P153
Driving support system setting di splay ............................P157
Exclusive content for SUBARU BRZ ...............................P154
Navigation system-linke d display ....................................P156
Settings display ...............................................................P157
Warning message display ...............................................P159
Compass ..............................................................................P186
Console ................................................................................P214
Control switch light ...............................................................P174
Coolant ...................................................................... P349, P384
Cooling system.....................................................................P348
Corrosion protection .............................................................P334 Cruise control ...................................................................... P260
Indicator light .................................................................. P149
Set indicator light ............................................................ P149
Cup holder ........................................................................... P214
DDaytime running light (DRL) system ........................... ......... P180
Defogger.............................................................................. P185
Defrosting ............................................................................ P203
Differential gear oil ................. ................................... P353, P383
Dimensions.......................................................................... P380
Disc brake pad wear warning indicators.............................. P245
Door Door unlock selection function ........................................ P100
Locks .............................................................................. P111
Open indicator ................................................................ P141
Double trip meter ................................................................. P128
Drive belt ............................................................................. P352
Drive information ................................................................. P153
Driving Car phone/cell phone...... .......................................... .......... P9
Drinking............................................................................... P7
Drugs .................................................................................. P8
Foreign countries ............................................................ P292
Pets..................................................................................... P9
Snowy and icy roads....................................................... P295
Tips .............................................................P235, P240, P290
Tired or sleepy .................................................................... P8
Winter ............................................................................. P293
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