engine SUBARU IMPREZA 2016 5.G Owners Manual

Maintenance and service/Spark plugs
Spark plugs
It may be difficult to replace the spark
plugs. It is recommended that you have
the spark plugs replaced by your
SUBARU dealer.
The spark plugs should be replaced
according to the maintenance schedule
in the“Warranty and Maintenance Book-
let ”.
CAUTION
Make sure the cables are replaced in
the correct order.
& Recommended spark plugs
For the recommended spark plugs, refer
to“Electrical system ”F 12-7.
Drive belts
It is unnecessary to check the deflection of
the drive belt periodically because your
engine is equipped with an automatic belt
tension adjuster. However, replacement of
the belt should be done according to the
maintenance schedule in the “Warranty
and Maintenance Booklet ”. Consult your
SUBARU dealer for replacement.
If the drive belt is loose, cracked or worn,
contact your SUBARU dealer.
Manual transmission oil
It is not necessary to check the transmis-
sion oil level. Check that there are no
cracks, damage or leakage. However, the
oil inspection should be performed ac-
cording to the maintenance schedule in
the “Warranty and Maintenance Booklet ”.
Consult your SUBARU dealer for details.
& Recommended grade and
viscosity
Each oil manufacturer has its own base
oils and additives. Never use different
brands together. For details, refer to
“Manual transmission, front differential
and rear differential gear oil ”F 12-6.
11-14

Maintenance and service/Brake booster
Brake booster
If the brake booster does not operate as
described in the following, have it checked
by your SUBARU dealer.
1. With the ignition switch in the“LOCK” /
“ OFF ”position, depress the brake pedal
several times, applying the same pedal
force each time. The distance the pedal
travels should not vary.
2. With the brake pedal depressed, start
the engine. The pedal should move
slightly down to the floor.
3. With the brake pedal depressed, stop
the engine and keep the pedal depressed
for 30 seconds. The pedal height should
not change.
4. Start the engine again and run for
approximately one minute then turn it off.
Depress the brake pedal several times to
check the brake booster. The brake
booster operates properly if the pedal
stroke decreases with each depression.
Brake pedal
Check the brake pedal free play and
reserve distance according to the main-
tenance schedule in the “Warranty and
Maintenance Booklet ”.
&Checking the brake pedal
free play
1) 0.02 –0.11 in (0.5 –2.7 mm)
Turn the ignition switch to the “LOCK”/
“OFF ”position and firmly depress the
brake pedal several times. Lightly pull
the brake pedal up with one finger to
check the free play with a force of less
than 2 lbf (10 N, 1 kgf).
If the free play is not within proper
specification, contact your SUBARU deal- er.
&
Checking the brake pedal
reserve distance
1) More than 2.56 in (65 mm)
Depress the pedal with a force of approxi-
mately 66 lbf (294 N, 30 kgf) and measure
the distance between the upper surface of
the pedal pad and the floor.
When the measurement is smaller than
the specification, or when the pedal does
not operate smoothly, contact with your
SUBARU dealer.
11-18

Clutch pedal (MT models)
Check the clutch pedal free play and
reserve distance according to the main-
tenance schedule in the“Warranty and
Maintenance Booklet ”.
&Checking the clutch function
Check the clutch engagement and disen-
gagement.
1. With the engine idling, check that there
are no abnormal noises when the clutch
pedal is depressed, and that shifting into
1st or reverse feels smooth.
2. Start the vehicle by releasing the pedal
slowly to check that the engine and
transmission smoothly couple without
any sign of slippage.
&Checking the clutch pedal
free play
1) 0.16 –0.43 in (4.0 –11.0 mm)
Lightly depress the clutch pedal down with
your finger until you feel resistance, and
check the free play.
If the free play is not within proper
specification, contact your SUBARU deal-
er.
Hill start assist system
Ensure that the Hill start assist system
operates properly under the following
circumstances.
1. Stop the vehicle on an uphill grade by
depressing the brake pedal (all models)
and clutch pedal (MT models only), with
the engine running.
2. Make sure that the vehicle does not
move backward for several seconds after
the brake pedal is released.
3. Then make sure the vehicle starts
climbing the grade by following the normal
starting procedures.
If the Hill start assist system does not
operate as described above, contact your
SUBARU dealer.
Maintenance and service/Clutch pedal (MT models)11-19

When there is only a small amount of
washer fluid remaining, the windshield
washer fluid warning light will illuminate.
When this occurs, refill the washer fluid.
&Adding the windshield
washer fluid
CAUTION
Never use engine coolant as washer
fluid because it could cause paint
damage.
Remove the washer tank filler cap, then
add windshield washer fluid until it
reaches the “FULL”mark on the tank.
& Windshield washer fluid
Use windshield washer fluid. If windshield
washer fluid is unavailable use clean
water.
In areas where water freezes in winter,
use an anti-freeze type windshield washer
fluid. SUBARU Windshield Washer Fluid
contains 58.5% methyl alcohol and 41.5%
surfactant, by volume. Its freezing tem-
perature varies according to how much it
is diluted, as indicated in the following
table.
Washer Fluid
Concentration Freezing
Temperature
30% 10.48F( −12 8C)
50% −48F( −20 8C)
100% −498F( −45 8C)
In order to prevent freezing of washer
fluid, check the freezing temperatures in
the table above when adjusting the fluid
concentration to the outside temperature.
If you fill the reservoir tank with a fluid with
a different concentration from the one
used previously, purge the old fluid from
the piping between the reservoir tank and
washer nozzles by operating the washer
for a certain period of time. Otherwise, if
the concentration of the fluid remaining in
the piping is too low for the outside temperature, it may freeze and block the
nozzles.
CAUTION
.
Adjust the washer fluid concen-
tration appropriately for the out-
side temperature. If the concen-
tration is inappropriate, sprayed
washer fluid may freeze on the
windshield and obstruct your
view, and the fluid may freeze in
the reservoir tank.
. State or local regulations on
volatile organic compounds may
restrict the use of methanol, a
common windshield washer anti-
freeze additive. Washer fluids
containing non-methanol anti-
freeze agents should be used
only if they provide cold weather
protection without damaging
your vehicle ’s paint, wiper blades
or washer system.
Maintenance and service/Windshield washer fluid11-29

Fuses
CAUTION
Never replace a fuse with one hav-
ing a higher rating or with material
other than a fuse because serious
damage or a fire could result.
The fuses are designed to melt during an
overload to prevent damage to the wiring
harness and electrical equipment. The
fuses are located in two fuse boxes.
One is located under the instrument panel
behind the fuse box cover on the driver ’s
seat side. To remove the cover, pull it out.
1) Spare fuses
The other one (main fuse box) is housed
in the engine compartment. Also, the
spare fuses are stored in the fuse box
cover.
The fuse puller is stored in the main fuse box in the engine compartment.
1) Good
2) Blown
If any lights, accessories or other electrical
controls do not operate, inspect the
corresponding fuse. If a fuse has blown,
replace it.
1. Turn the ignition switch to the
“LOCK”/
“OFF ”position and turn off all electrical
accessories.
2. Remove the cover.
3. Determine which fuse may be blown.
Look at the back side of each fuse box
cover and refer to “Fuses and circuits”
F 12-10.
Maintenance and service/Fuses
–CONTINUED –11-35

Specifications..................................................... 12-2Dimensions........................................................ 12-2
Engine ............................................................... 12-3
Fuel ................................................................... 12-3
Engine oil .......................................................... 12-4
Manual transmission, front differential and rear differential gear oil ........................................... 12-6
Fluids ................................................................ 12-7
Engine coolant ................................................... 12-7
Electrical system ................................................ 12-7
Tires .................................................................. 12-8 Brake disc
......................................................... 12-9Fuses and circuits ........................................... 12-10Fuse panel located in the passenger
compartment ................................................. 12-10
Fuse panel located in the engine compartment ................................................. 12-12
Bulb chart......................................................... 12-14Safety precautions ........................................... 12-14
Bulb chart ....................................................... 12-15
Vehicle identification ....................................... 12-17
Specifications
12

&Engine
Engine model
FB20
(2.0 L, DOHC, non-turbo)
Engine type Horizontally opposed, liquid cooled 4 cylinder, 4-stroke gasoline engine
Displacement cu-in (cc) 121.7 (1,995)
Bore 6Stroke in (mm) 3.31 63.54 (84.0 690.0)
Compression ratio 10.5 : 1
Firing order 1
– 3–2– 4
& Fuel
Fuel requirement Fuel tank capacity
Unleaded gasoline with 87 AKI (90 RON) or higher Except Crosstrek models
14.5 US gal (55 liters, 12.1 Imp gal)
Crosstrek models 15.9 US gal (60 liters, 13.2 Imp gal)
For more details, refer to “Fuel ”F 7-3. Specifications/Specifications
–CONTINUED –
12-3

Specifications/Specifications
&Engine oil
For the checking, adding and replacing procedure or other details, refer to “Engine oil ”F 11-8.
NOTEThe procedure for changing the engine oil and oil filter should be performed by a properly-trained expert. It is recommended
that you have this service performed by your SUBARU dealer.
! Approved engine oil
Always use the SUBARU approved engine oil. For further details, please contact your SUBARU dealer.
If the approved engine oil is unavailable, use the alternative engine oil described on the next page.
12-4

!Alternative engine oil
If the SUBARU approved oil is unavailable, the following alternative oil can be used.
NOTEEach quantity indicated here is only a guideline. The necessary quantity for replacement may differ slightly depending on the
temperature and other factors.
Oil grade SAE viscosity No. and
applicable temperature Engine oil capacity
API (American Petroleum Insti-
tute) classification
SNwith the
words “RESOURCE CONSER-
VING ” orILSAC (International Lubricant
Specification Advisory Commit-
tee)
GF-5 , which can be identi-
fied with the ILSAC certification
mark (Starburst mark) 0W-20 synthetic
oil is the required oil
for optimum engine performance and
protection. Conventional oil may be
used if synthetic oil is unavailable.
*: If 0W-20 synthetic oil is not available,
5W-30 or 5W-40 conventional oil may
be used if replenishment is needed but
should be changed to 0W-20 synthetic
oil at the next oil change.
– Adding the oil from low level to
full level:
1.1 US qt (1.0 liter, 0.9 Imp qt)
– Changing the oil and oil filter:
5.1 US qt (4.8 liters, 4.2 Imp qt)
Specifications/Specifications
–CONTINUED –
12-5

&Fluids
Fluid
Fluid type*1Fluid capacity*2Remarks*3
Continuously variable transmission
fluid (CVT models) Consult your SUBARU dealer. 12.6 US qt (11.9 liters, 10.5 Imp qt) “
Continuously variable trans-
mission fluid ”F 11-15
Brake fluid FMVSS No. 116, fresh DOT 3 or DOT 4
brake fluid
–“
Brake fluid”F 11-16
Clutch fluid (MT models) FMVSS No. 116, fresh DOT 3 or DOT 4
brake fluid
–
“
Clutch fluid (MT models) ”F 11 -
17
*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
MT models 8.5 US qt (8.0 liters, 7.0 Imp qt)
SUBARU Super Coolant
CVT models 8.9 US qt (8.4 liters, 7.4 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 ”F 11-10.
& Electrical system
Battery type 55D23L
Alternator 12V-130A
Spark plugs SILZKAR7B11 (NGK)Specifications/Specifications
–CONTINUED –
12-7