2012 INFINITI G-CONVERTIBLE engine

8-6Maintenance and do-it-yourself
.The fuel filter or fuel lines should be
serviced by an INFINITI retailer because
the fuel lines are under high pressure
even when the engine is off.
CAUTION
.Do not work under the hood while the
engine is hot. Turn the engine off and
wait until it cools down.
. Avoid direct contact with used engine oil
and coolant. Improperly disposed engine
oil, coolant, and/or other vehicle fluids
can damage the environment. Always
conform to local regulations for disposal
of vehicle fluid.
This “8. Maintenance and do-it-yourself”
section gives instructions regarding only
those items which are relatively easy for an
owner to perform.
A genuine INFINITI Service Manual is also
available. (See “Owner’s manual/service
manual order information” (P.9-24).)
You should be aware that incomplete or
improper servicing may result in operating
difficulties or excessive emissions, and could affect your warranty coverage.
If in
doubt about any servicing, we recommend
that it be done by an INFINITI retailer.

GUID-525850E4-370C-413C-8AEB-A266E40A1898
SSI0345
VQ37VHR ENGINEGUID-A979648E-87A1-4FAB-A735-8E8F3227852A1. Fuse/fusible link holder
2. Battery
3. Engine oil filler cap
4. Brake fluid reservoir
5. Clutch fluid reservoir (Manual Trans-mission models)
6. Window washer fluid reservoir
7. Power steering fluid reservoir
8. Air cleaner
9. Radiator filler cap 10. Drive belt location
11. Engine coolant reservoir
12. Engine oil dipstick
Maintenance and do-it-yourself8-7
ENGINE COMPARTMENT CHECK LOCATIONS

8-8Maintenance and do-it-yourself
GUID-EE54D4F6-5F4A-4B0F-A147-7A9330E7ABCFThe engine cooling system is filled at the
factory with a pre-diluted mixture of 50%
Genuine NISSAN Long Life Antifreeze/Cool-
ant (blue) and 50% water to provide year-
round anti-freeze and coolant protection.
The antifreeze solution contains rust and
corrosion inhibitors. Additional engine
cooling system additives are not neces-
sary.
WARNING
.Never remove the radiator or coolant
reservoir cap when the engine is hot.
Wait until the engine and radiator cool
down. Serious burns could be caused by
high pressure fluid escaping from the
radiator. See precautions in “If your
vehicle overheats” (P.6-16) of this man-
ual.
. The radiator is equipped with a pressure
type radiator cap. To prevent engine
damage, use only a genuine NISSAN
radiator cap.
CAUTION
.Never use any cooling system additives
such as radiator sealer. Additives may
clog the cooling system and cause
damage to the engine, transmission
and/or cooling system.
. When adding or replacing coolant, be
sure to use only Genuine NISSAN Long
Life Antifreeze/Coolant (blue) or equiva-
lent. Genuine NISSAN Long Life Anti-
freeze/Coolant (blue) is pre-diluted to
provide antifreeze protection to −348F
(−378C). If additional freeze protection is
needed due to weather where you
operate your vehicle, add Genuine
NISSAN Long Life Antifreeze/Coolant
(blue) concentrate following the direc-
tions on the container. If an equivalent
coolant other than Genuine NISSAN Long
Life Antifreeze/Coolant (blue) is used,
follow the coolant manufacturer’s in-
structions to maintain minimum anti-
freeze protection to −348F (−378C). The
use of other types of coolant solutions
other than Genuine NISSAN Long Life
Antifreeze/Coolant (blue) or equivalent
may damage the engine cooling system. .
The life expectancy of the factory-fill
coolant is 105,000 miles (168,000 km)
or 7 years. Mixing any other type of
coolant other than Genuine NISSAN Long
Life Antifreeze/Coolant (blue), including
Genuine NISSAN Long Life Antifreeze/
Coolant (green), or the use of non-
distilled water will reduce the life
expectancy of the factory-fill coolant.
Refer to the INFINITI Service and Main-
tenance Guide for more details.
ENGINE COOLING SYSTEM

SDI2043
CHECKING ENGINE COOLANT LEVELGUID-DA7D7105-DC17-4713-B231-B4FA68BFD877Check the coolant levelin the reservoir
tank when the engine is cold. If the coolant
level is below the MIN level
*2, open the
reservoir tank cap and add coolant up to
the MAX level
*1. If the reservoir tank is
empty, check the coolant level in the
radiator when the engine is cold. If there
is insufficient coolant in the radiator, fill
the radiator with coolant up to the filler
opening and also add it to the reservoir
tank up to the MAX level
*1.
Tighten the cap securely after adding
engine coolant. If the cooling system frequently requires
coolant, have it checked by an INFINITI
retailer.
CHANGING ENGINE COOLANTGUID-448B6596-5480-4B35-8757-8FBCB36BF623Major cooling system repairs should be
performed by an INFINITI retailer. The
service procedures can be found in the
appropriate INFINITI Service Manual.
Improper servicing can result in reduced
heater performance and engine overheat-
ing.
WARNING
.
To avoid the danger of being scalded,
never change the coolant when the
engine is hot.
. Never remove the radiator cap when the
engine is hot. Serious burns could be
caused by high pressure fluid escaping
from the radiator.
. Avoid direct skin contact with used
coolant. If skin contact is made, wash
thoroughly with soap or hand cleaner as
soon as possible.
. Keep coolant out of the reach of children
and pets.
Engine coolant must be disposed of
properly. Check your local regulations.
Maintenance and do-it-yourself8-9

8-10Maintenance and do-it-yourself
GUID-D6CB878A-AAC3-4398-B058-77A171E0C394
SDI2045
CHECKING ENGINE OIL LEVELGUID-806540FD-DD98-45E7-8655-4199E7FCE41B1. Park the vehicle on a level surface andapply the parking brake.
2. Run the engine until it reaches operat- ing temperature.
3. Turn off the engine. Wait more than 15
minutes for the oil to drain back into
the oil pan.
4. Remove the dipstick and wipe it clean. Reinsert it all the way.
5. Remove the dipstick again and check the oil level. It should be within the
range
*1. If the oil level is below*2,
remove the oil filler cap and pour recommended oil through the opening.
Do not overfill
*3.
6. Recheck oil level with the dipstick.
It is normal to add some oil between oil
maintenance intervals or during the break-
in period, depending on the severity of
operating conditions.
CAUTION
Oil level should be checked regularly.
Operating the engine with an insufficient
amount of oil can damage the engine, and
such damage is not covered by the war-
ranty.
CHANGING ENGINE OIL AND FILTERGUID-F404E429-876E-48DC-8B0E-5858D249A08E
Vehicle set-upGUID-5EE5B5DE-2ACC-4CF1-80B3-8DE973DC3EAA1. Park the vehicle on a level surface and apply the parking brake.
2. Run the engine until it reaches operat- ing temperature.
3. Turn the engine off and wait more than 15 minutes.
4. Raise and support the vehicle using a suitable floor jack and safety jack
stands.
.Place the safety jack stands underthe vehicle jack-up points.
.A suitable adapter should be at-tached to the jack stand saddle.
5. Remove the plastic engine undercover. a. Remove the small plastic clips at the center of the undercover.
b. Then remove the bolts that hold the undercover in place.
CAUTION
Make sure the correct lifting and support
points are used to avoid vehicle damage.
ENGINE OIL

SDI2335
Engine oil and filterGUID-1CDEEF93-AD62-40A3-B762-F692019EE0591. Place a large drain pan under the drainplug.
2. Remove the oil filler cap.
3. Remove the drain plug
*1with a
wrench and completely drain the oil.
CAUTION
Be careful not to burn yourself, as the
engine oil is hot.
.Waste oil must be disposed of
properly.
.Check your local regulations.
(Perform steps 4 to 7 only when the
engine oil filter change is needed.)
4. Loosen the oil filter
*2with an oil filter
wrench. Remove the oil filter by turning
it by hand.
5. Wipe the engine oil filter mounting
surface with a clean rag.
CAUTION
Be sure to remove any old rubber gasket
remaining on the mounting surface of the
engine. Failure to do so could lead to engine
damage.
6. Coat the gasket on the new filter with
clean engine oil.
7. Screw in the oil filter clockwise until a slight resistance is felt, then tighten
additionally more than 2/3 turn.
Oil filter tightening torque:11 to 15 ft-lb
(14.7 to 20.5 N·m)
8. Clean and re-install the drain plug with a new washer. Securely tighten the
drain plug with a wrench. Drain plug tightening torque:
22 to 29 ft-lb
(29 to 39 N·m)
Do not use excessive force.
9. Refill the engine with the recommended oil through the oil filler opening, and
install the oil filler cap securely.
See “Capacities and recommended
fuel/lubricants” (P.9-2) for drain and
refill capacity. The drain and refill
capacity depends on the oil tempera-
ture and drain time. Use these specifi-
cations for reference only. Always use
the dipstick to determine the proper
amount of oil in the engine.
10. Start the engine and check for leakage around the drain plug and the oil filter.
Correct as required.
11. Turn the engine off and wait more than 15 minutes. Check the oil level with the
dipstick. Add engine oil if necessary.
Maintenance and do-it-yourself8-11

8-12Maintenance and do-it-yourself
After the operationGUID-B97EAD5B-9BEE-4BB5-93D4-6870CAA2D63C1.Install the engine undercover into
position as the following steps.
a. Pull the center of the small plastic clips out.
b. Hold the engine undercover into position.
c. Insert the clips through the under- cover into the holes in the frame,
then push the center of the clips in
to lock the clips in place.
d. Install the bolts that hold the
undercover in place. Be careful
not to strip the bolts or over-
tighten them.
2. Lower the vehicle carefully to the
ground.
3. Dispose of waste oil and filter properly.
WARNING
. Prolonged and repeated contact with
used engine oil may cause skin cancer.
. Try to avoid direct skin contact with used
oil. If skin contact is made, wash
thoroughly with soap or hand cleaner
as soon as possible. .
Keep used engine oil out of the reach of
children.
GUID-98EC505F-77DF-41A4-AE70-9205FB568012When checking or replacement is required,
we recommend an INFINITI retailer for
servicing.
CAUTION
.Use only Genuine NISSAN Matic S ATF.
Do not mix with other fluids.
. Using automatic transmission fluid other
than Genuine NISSAN Matic S ATF will
cause deterioration in driveability and
automatic transmission durability, and
may damage the automatic transmis-
sion, which is not covered by the INFINITI
new vehicle limited warranty.
AUTOMATIC TRANSMISSION FLUID

GUID-E6349F5A-30CB-464F-9C20-522FC0ACF05D
SDI1765A
Check the fluid level in the reservoir.
The fluid level should be checked with the
engine off using the HOT range (
*1: HOT
MAX.,
*2: HOT MIN.) at fluid temperatures
of 122 to 1768F (50 to 808C) or using the
COLD range (
*3: COLD MAX.,*4: COLD
MIN.) at fluid temperatures of 32 to 868F (0
to 308C).
If the fluid is below the MIN line, add
Genuine NISSAN PSF or equivalent. Re-
move the cap and fill through the opening.
CAUTION
. Do not overfill.
. Use Genuine NISSAN PSF or equivalent.
GUID-1D2EA3BC-D20D-4834-8E55-D17790F6C116For further brake and clutch fluid informa-
tion, see “Capacities and recommended
fuel/lubricants” (P.9-2) of this manual.
WARNING
.Use only new fluid from a sealed
container. Old, inferior or contaminated
fluid may damage the brake system. The
use of improper fluids can damage the
brake system and affect the vehicle’s
stopping ability.
. Be sure to clean the filler cap before
removing.
. Brake fluid is poisonous and should be
stored carefully in marked containers out
of the reach of children.
CAUTION
Do not spill the fluid on painted surfaces.
This will damage the paint. If fluid is spilled,
wash the surface with water.
Maintenance and do-it-yourself8-13
POWER STEERING FLUID BRAKE AND CLUTCH FLUID