engine SUBARU BRZ 2015 1.G Owners Manual

406
5-2. Steps to take in an emergency
■Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
■Avoiding a discharged battery
●Turn off the headlights and the air conditioning system while the engine is
off.
●Turn off any unnecessary electrical components when the vehicle is run-
ning at a low speed for an extended period, such as in heavy traffic, etc.
■Charging the battery
The electricity stored in the battery will discharge gradually even when the
vehicle is not in use, due to natural discharge and the draining effects of cer-
tain electrical appliances. If the vehicle is left for a long time, the battery may
discharge, and the engine may be unable to start. (The battery recharges
automatically during driving.)
■Precautions when the battery is discharged (vehicles with a keyless
access with push button start system)
●In some cases, it may not be possible to unlock the doors using the key-
less access with push button start system when the battery is dis-
charged. Use the remote keyless entry system or the mechanical key to
lock or unlock the doors.
●The engine may not start on the first attempt after the battery has
recharged but will start normally after the second attempt. This is not a
malfunction.
●The push-button ignition switch mode is memorized by the vehicle. When
the battery is reconnected, the system will return to the mode it was in
before the battery was discharged. Before disconnecting the battery, turn
the push-button ignition switch off.
If you are unsure what mode the push-button ignition switch was in
before the battery discharged, be especially careful when reconnecting
the battery.

5
When trouble arises
409
5-2. Steps to take in an emergency
If your vehicle overheats
If your engine overheats:Stop the vehicle in a safe place and turn off the air condi-
tioning system.
Check to see if steam is coming out from under the engine
hood.
If you see steam:
Stop the engine. Carefully lift the engine hood after the
steam subsides and then restart the engine.
If you do not see steam:
Leave the engine running and carefully lift the engine hood.
Check to see if the cooling fan is operating.
If the fan is operating:
Wait until the temperature of the engine (shown on the
instrument cluster) begins to fall and then stop the engine.
If the fan is not operating:
Stop the engine and call your SUBARU dealer. After the engine has cooled
down sufficiently, check the
engine coolant level and
inspect the radiator core (radi-
ator) for any leaks.
STEP 1
STEP 2
STEP 3
STEP 4

410
5-2. Steps to take in an emergency
■Overheating
If you observe the following, your vehicle may be overheating.
●The engine coolant temperature gauge enters the red zone or a loss of
power is experienced.
●Steam is coming from under the engine hood.
WARNING
■To prevent an accident or injury when inspecting under the engine
hood of your vehicle
●If steam is seen coming from under the engine hood, do not open the
engine hood until the steam has subsided. The engine compartment may
be very hot, causing serious injury such as burns.
●Keep hands and clothing away from the fan and other belts while the
engine is running.
●Do not loosen the radiator cap while the engine and radiator are hot.
Serious injury, such as burns, may result from hot coolant and steam
released under pressure.
Add engine coolant if neces-
sary.
Water can be used in an emer-
gency if engine coolant is
unavailable. ( →P. 422)
Have the vehicle checked at the nearest SUBARU dealer as soon
as possible.STEP 5

5
When trouble arises
411
5-2. Steps to take in an emergency
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.

412
5-2. Steps to take in an emergency
If the vehicle becomes stuck
■When it is difficult to free the vehicle
Carry out the following procedures
if the tires spin or the vehicle
becomes stuck in mud, dirt, or snow:
Stop the engine. Set the parking brake and shift the select
lever to P (vehicles with an automatic transmission) or shift
lever to neutral (vehicles with a manual transmission).
Remove the mud, snow or sand from around the rear
wheels.
Place wood, stones or some other material under the rear
wheels to help provide traction.
Restart the engine.
Shift the select lever to the D or R position (vehicles with an
automatic transmission) or shift lever to 1 or R position
(vehicles with a manual transmission) and release the park-
ing brake. Then, while exercising caution, depress the
accelerator pedal.
STEP 1
STEP 2
STEP 3
STEP 4
STEP 5
Press to turn off TRAC. ( →P. 218)

418
6-1. Specifications
■Engine number
The engine number is stamped on the engine block as shown.

419
6-1. Specifications
6
Vehicle specifications
Engine
Fuel
* : If unleaded gasoline with an octane rating of 93 AKI (98 RON) is not avail-
able, unleaded gasoline with an octane rating of 91 AKI (95 RON) may be
used with no detriment to engine durability or driveability.
Model FA20
Ty p e Horizontally opposed, liquid cooled 4 cylinder, 4-
stroke gasoline
Bore and stroke 3.4
× 3.4 in. (86 × 86 mm)
Displacement 121.9 cu.in. (1998 cm 3
)
Drive belt tension Automatic adjustment
Fuel type Unleaded gasoline only
Octane rating 93 AKI (98 RON) or higher*
Fuel tank capacity
(Reference) 13.2 gal. (50 L, 11.0 Imp. gal.)

420
6-1. Specifications
Lubrication system
* : The engine oil capacity is a reference quantity to be used when changing
the engine oil. Warm up and turn off the engine, wait more than 5 minutes,
and check the oil level on the dipstick.
■Engine oil selection
Always use SUBARU approved engine oil. For details, we recom-
mend that you contact your SUBARU dealer.
If approved engine oil is unavailable, another motor oil of matching
quality can also be used.
Oil grade:
ILSAC GF4 or GF5 multigrade engine oil
API classification SM or SN with the words “ENERGY CONSERV-
ING” or “RESOURCE CONSERVING”
Recommended viscosity: SAE 0W-20
SAE 0W-20 is the best choice for
good fuel economy and good
starting in cold weather.
Oil capacity
(Drain and refill 
reference*)

425
6-1. Specifications
6
Vehicle specifications
Brakes
* 1
: Minimum pedal clearance when depressed with a force of 110 lbf (490 N, 50
kgf) while the engine is running.
* 2
: Parking brake lever travel when pulled up with a force of 45.0 lbf (200 N,
20.4 kgf).
■Brake disc
If you need information on the usage limit value of brake discs and
the method for measuring them, we recommend that you consult
your SUBARU dealer.
Pedal clearance *1 2.16 in. (55 mm) Min.
Pedal free play 0.020
 0.079 in. (0.5  2.0 mm)
Brake pad wear limit 0.06 in. (1.5 mm)
Parking brake lining wear limit 0.06 in. (1.5 mm)
Parking brake lever travel *2
7  8 clicks
Fluid type FMVSS No.116 fresh DOT 3 or DOT 4
brake fluid
Brake pedal
Pedal
clearance
Carpet

428
6-1. Specifications
Fuel infor mation
■Fuel tank opening for unleaded gasoline
To help prevent incorrect fueling, your SUBARU has a fuel tank opening that
only accommodates the special nozzle on unleaded fuel pumps.
■If your engine knocks
●Consult your SUBARU dealer.
●You may occasionally notice light knocking for a short time while acceler-
ating or driving uphill. This is normal and there is no need for concern.
■Gasoline quality
In very few cases, driveability problems may be caused by the brand of gas-
oline you are using. If driveability problems persist, try changing the brand of
gasoline. If this does not correct the problem, consult your SUBARU dealer.
■Fuel octane rating
This octane rating is the average of the Research Octane and Motor Octane
numbers and is commonly referred to as the Anti Knock Index (AKI).
Using a gasoline with a lower octane rating can cause persistent and heavy
knocking, which can damage the engine. Do not be concerned if your vehi-
cle sometimes knocks lightly when you drive up a hill or when you acceler-
ate. Contact your SUBARU dealer if you use a fuel with the specified octane
rating and your vehicle knocks heavily or persistently.
The engine is designed to operate at maximum performance using
unleaded gasoline with an octane rating of 93 AKI (98 RON) or
higher. If 93 AKI (98 RON) fuel is not readily available in your area,
unleaded gasoline with an octane rating of 91 AKI (95 RON) may be
used with no detriment to engine
durability or driveability. However,
you may notice a slight decrease in maximum engine performance
and you may hear some knocking (pinking) of an engine while using
91 AKI (95 RON) fuel. Use of 91 AKI ( 95 RON) fuel will not affect your
warranty coverage.