2018 SUBARU BRZ radiator cap

360
4-3. Do-it-yourself maintenance
BRZ_U (A4450BE-A)
Engine compartment
Battery (→P. 368)
Engine oil level dipstick (→ P. 361)
Brake fluid reservoir (→ P. 366)
Engine oil filler cap (→ P. 362)Washer fluid tank
(→ P. 372)
Electric cooling fans
Condenser ( →P. 366)
Radiator ( →P. 366)
Engine coolant reservoir (→ P. 364)
Fuse box ( →P. 397)

364 4-3. Do-it-yourself maintenance
BRZ_U (A4450BE-A)
Engine coolantThe coolant level is satisfactory if it is between the “FULL” and “LOW”
lines on the reservoir when the engine is cold. Reservoir cap
“FULL”
“LOW”
If the level is on or below the
“LOW” line, add coolant up to the
“FULL” line.
CAUTION
■To prevent serious engine damage
Check the oil level on a regular basis.
■ When replacing the engine oil
●Be careful not to spill engine oil on the vehicle components.
● Avoid overfilling, or the engine could be damaged.
● Check the oil level on the dipstick every time you fill the oil.
● Be sure the engine oil filler cap is properly tightened.
■If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, engine coolant filler cap, radiator cap,
drain cock and water pump.
If you cannot find a leak, have your SUBARU dealer pressure test the cap
and check for leaks in the cooling system.

365
4-3. Do-it-yourself maintenance
4
Maintenance and care
BRZ_U (A4450BE-A)
■
Coolant selection
Only use SUBARU Super Coolant or similar high-quality ethylene glycol-
based non-silicate, non-amine, non-nitr ite, and non-borate coolant with long-
life hybrid organic acid technology.
SUBARU Super Coolant is a mixture of 50% coolant and 50% deionized
water. (Enabled: -31 °F [-35 °C])
For more details about engine cool ant, contact your SUBARU dealer.
WARNING
■When the engine is hot
Do not remove the radiator cap.
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.
CAUTION
■When adding engine coolant
Coolant is neither plain water nor stra ight antifreeze. The correct mixture of
water and antifreeze must be used to provide proper lubrication, corrosion
protection and cooling. Be sure to read the antifreeze or coolant label.
■ If you spill coolant
Be sure to wash it off with water to prevent it damaging parts or paint.

486 5-2. Steps to take in an emergency
BRZ_U (A4450BE-A)The coolant level is satisfactory if
it is between the “FULL” and
“LOW” lines on the reservoir.
Reservoir
“FULL”
“LOW”
Radiator cap
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the engine and turn the air conditioning system on to
check that the radiator cooling fans operate and to check for
coolant leaks from the radiator or hoses.
The fans operate when the air conditioning system is turned on
immediately after a cold start. Confirm that the fans are operating by
checking the fan sound and air flow. If it is difficult to check these,
turn the air conditioning system on and off repeatedly.
(The fans may not operate in freezing temperatures.)
If the fans are not operating: Stop the engine immediately and contact your SUBARU
dealer.
If the fans are operating: Have the vehicle inspected at the nearest SUBARU dealer.
STEP 4
STEP 5
STEP 6
STEP 7

5
When trouble arises
487
5-2. Steps to take in an emergency
BRZ_U (A4450BE-A)
WARNING
■
To prevent an accident or injury when inspecting under the hood of
your vehicle
● If steam is seen coming from under the hood, do not open the hood until
the steam has subsided. The engine compartment may be very hot, caus-
ing serious injuries such as burns.
● Keep hands and clothing (especially a tie, a scarf or a muffler) away from
the fans and belts. Failure to do so may cause the hands or clothing to be
caught, resulting in serious injury.
● Do not loosen the radiator cap and the coolant reservoir cap while the
engine and radiator are hot.
Serious injury, such as burns, may result from hot coolant and steam
released under pressure.
CAUTION
■When adding engine coolant
Wait until the engine has cooled down before adding engine coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot engine too
quickly can cause damage to the engine.
■ To prevent damage to the cooling system
Observe the following precautions:
● Avoid contaminating the coolant with foreign matter (such as sand or dust
etc.).
● Do not use any coolant additives.

560 Alphabetical index
BRZ_U (A4450BE-A)
Paddle shift levers ................... 188
Parking brake ........................... 197
Parking lightsSwitch.................................... 233
Power outlets ........................... 316
Power windows ..........................74
Radiator .................................... 366
Rear seats ...................................56
Rear side marker lights Switch.................................... 233
Rear turn signal lights Switch.................................... 195
Rear view camera..................... 248
Rear view mirror Inside rear view mirror.............69
Outside rear view mirrors ........71
Rear window defogger ............ 302
Replacing Fuses .................................... 397
Key battery ............................ 392
Light bulbs............................. 405
Tires ...................................... 457
Reporting safety defects
for U.S. owners ...................... 529
REV indicator ........................... 161 Seat heaters ............................. 318
Seatbelts
Adjusting the seatbelt.............. 60
Automatic Locking Retractor (ALR) .................... 62
Child restraint system
installation........................... 145
Cleaning and maintaining the seatbelts ....................... 343
Emergency Locking Retractor (ELR) .................... 62
How to wear your seatbelt ...... 60
How your child should
wear the seatbelt .................. 62
Pregnant women, proper seatbelt use ............... 64
Reminder light ....................... 432
Seatbelt guide ......................... 61
Seatbelt pretensioners ............ 61
Seating capacity ...................... 276
Seats Adjustment .............................. 53
Adjustment precautions .......... 54
Child seats/child restraint system installation .............. 145
Cleaning................................ 342
Head restraint ......................... 58
Properly sitting in the seat....... 91
Seat heaters.......................... 318
Service reminder indicators .............................. 203P
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