2012 INFINITI G37 check engine

Black plate (417,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]GUID-FB0623EB-5FAD-40C4-9AB0-442E7E1A0410
SDI2505
VQ25HR engine
SDI2045
VQ37VHR engine CHECKING ENGINE OIL LEVEL GUID-EB400D20-7A84-4713-89BD-9708FBC8D001
1. Park the vehicle on a level surface and
apply 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 warranty.
CHANGING ENGINE OIL AND FILTER GUID-8EFE39B7-109C-4EBB-91A7-80DFF961CBD7
Vehicle set-up GUID-4BC77A05-BF08-445F-911E-85628C534413
1. 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 under
the 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 clip at the
center point of the undercover.
b. Then remove the other bolts that
hold the undercover in place.
Maintenance and do-it-yourself
8-11ENGINE OIL

Black plate (418,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]8-12 Maintenance and do-it-yourselfCAUTIONMake sure the correct lifting and support
points are used to avoid vehicle damage.
SDI2335
Two-wheel drive (2WD) models (VQ25HR/
VQ37VHR engine)
Engine oil and filter GUID-189A8074-AB5D-4F02-B5E6-2CEF3A0EAAE3
1. Place a large drain pan under the drain
plug.
2. Remove the oil filler cap.
3. Remove the drain plug
* 1
with a
wrench and completely drain the oil.
CAUTION Be careful not to burn yourself, as the
engine oil is hot. SDI2047
All-wheel drive (AWD) models (VQ25HR/
VQ37VHR engine) .
Waste oil must be disposed of
properly. .
Check your local regulations.
4. (Perform steps 4 to 7 only when the
engine oil filter change is needed.)
Loosen the oil filter
* 2
with 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.

Black plate (419,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]CAUTIONBe 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 engine with recommended oil 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.
After the operation GUID-28B45484-D2E9-4712-897E-4EBAD29B4BC7
1. Install the engine undercover into
position as the following steps.
a. Pull the center of the small plastic
clip out.
b. Hold the engine undercover into
position.
c. Insert the clip through the under-
cover into the hole in the frame, then
push the center of the clip in to lock
the clip in place.
d. Install the other 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 reach of
children.
Maintenance and do-it-yourself
8-13

Black plate (424,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]8-18 Maintenance and do-it-yourself DI0137MA
Check the fluid level in each cell (Remove
the battery cover if it is necessary). It
should be between the UPPER LEVEL
* 1
and LOWER LEVEL
* 2
lines.
If it is necessary to add fluid, add only
distilled water to bring the level to the
indicator in each filler opening. Do not
overfill. SDI1480C
1. Remove the cell plugs
* A
.
2. Add distilled water up to the UPPER
LEVEL
* 1
line.
If the side of the battery is not clear,
check the distilled water level by
looking directly above the cell; the
condition
* 1
indicates OK and the
conditions
* 2
needs more to be added.
3. Tighten cell plugs
* A
.
Vehicles operated in high temperatures or
under severe conditions require frequent
checks of the battery fluid level. JUMP STARTING GUID-6645B036-2286-48B9-B8ED-5E16B522CC2D
If jump starting is necessary, see “ Jump
starting ” (P.6-8). If the engine does not
start by jump starting, the battery may
have to be replaced. Contact an INFINITI
retailer.

Black plate (425,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]GUID-943BC148-9A3A-474D-8113-30A996E2E73B
CAUTION. Do not ground accessories directly to the
battery terminal. Doing so will bypass
the variable voltage control system and
the vehicle battery may not charge
completely.
. Use electrical accessories with the en-
gine running to avoid discharging the
vehicle battery.
The variable voltage control system mea-
sures the amount of electrical discharge
from the battery and controls voltage
generated by the generator. GUID-2598C543-2A3B-4E05-90F6-3739930B5F0C
SDI2117
VQ25HR engine
1. Power steering fluid pump
2. Alternator
3. Crankshaft pulley
4. Air conditioner compressor
! : Tension checking points SDI2119
VQ37VHR engine
1. Power steering fluid pump
2. Alternator
3. Crankshaft pulley
4. Air conditioner compressor
5. Drive belt auto-tensioner
WARNING Be sure the ignition switch is in the OFF or
LOCK position before servicing drive belts.
The engine could rotate unexpectedly.
1. Visually inspect each belt for signs of
unusual wear, cuts, fraying or loosen-
Maintenance and do-it-yourself
8-19VARIABLE VOLTAGE CONTROL SYSTEM DRIVE BELTS

Black plate (426,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]8-20 Maintenance and do-it-yourselfess. If the belt is in poor condition or
loose, have it replaced or adjusted by
an INFINITI retailer.
2. Have the belts checked regularly for
condition and tension in accordance
with the maintenance schedule in your
“ INFINITI Service and Maintenance
Guide ” . GUID-B889B2DB-0702-4E25-998D-9EFCEB6380ED
WARNING Be sure the engine and the ignition switch
are off and that the parking brake is
engaged securely.
CAUTION Be sure to use the correct socket to remove
the spark plugs. An incorrect socket can
damage the spark plugs. SDI2020
REPLACING SPARK PLUGS GUID-89AEBA13-D3D8-4D70-90D6-4674BC5CE9C3
If replacement is required, see an INFINITI
retailer for servicing.
Iridium-tipped spark plugs GUID-4C8CEFDE-424F-4945-8A13-7DFAE22BFEE0
It is not necessary to replace the iridium-
tipped spark plugs as frequently as the
conventional type spark plugs since they
will last much longer. Follow the main-
tenance schedule in “ INFINITI Service and
Maintenance Guide ” , but do not reuse
them by cleaning or regapping.SPARK PLUGS

Black plate (430,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]8-24 Maintenance and do-it-yourself GUID-41D7E39E-6F5A-404E-A0B5-F23908CDD33C
SDI1479A
ENGINE COMPARTMENT GUID-1BD473A4-2C19-4D87-ADC3-1791751AF8EF
CAUTIONNever use a fuse of a higher or lower
amperage rating than that specified on the
fuse box cover. This could damage the
electrical system or cause a fire.
If any electrical equipment does not
operate, check for an open fuse.
1. Be sure the ignition switch is pushed to
the OFF or LOCK position and the
headlight switch is turned to OFF. 2. Open the engine hood and remove the
cover on the battery and the fuse/
fusible link holder.
3. Remove the fuse/fusible link holder
cover.
4. Remove the fuse with the fuse puller.
SDI1754
5. If the fuse is open
* A
, replace it with a
new fuse
* B
. Spare fuses are stored in
the passenger compartment fuse box.
6. If a new fuse also opens, have the
electrical system checked and repaired
by an INFINITI retailer.
Fusible links GUID-E9133FFB-99A7-4084-8BC3-32BBC0B20EAC
If any electrical equipment does not
operate and fuses are in good condition,
check the fusible links. If any of these
fusible links are melted, replace only with
genuine INFINITI parts.FUSES

Black plate (455,1)
[ Edit: 2012/ 1/ 17 Model: V36-D ]. If an oxygenate-blend, excepting a
methanol blend, is used, it should
contain no more than 10% oxygenate.
(MTBE may, however, be added up to
15%.)
. If a methanol blend is used, it should
contain no more than 5% methanol
(methyl alcohol, wood alcohol). It
should also contain a suitable amount
of appropriate cosolvents and corro-
sion inhibitors. If not properly formu-
lated with appropriate cosolvents and
corrosion inhibitors, such methanol
blends may cause fuel system damage
and/or vehicle performance problems.
At this time, sufficient data is not
available to ensure that all methanol
blends are suitable for use in INFINITI
vehicles.
If any undesirable driveability problems
such as engine stalling or hard hot starting
are experienced after using oxygenate-
blend fuels, immediately change to a
non-oxygenate fuel or a fuel with a low
blend of MTBE.
Take care not to spill gasoline during
refueling. Gasoline containing oxygenates
can cause paint damage. E-85 fuel GUID-BE764F0C-6A10-497C-B4F9-CD1D0E122DA3
E-85 fuel is a mixture of approximately
85% fuel ethanol and 15% unleaded
gasoline. E-85 can only be used in a
Flexible Fuel Vehicle (FFV). Do not use E-
85 fuel in your vehicle. U.S. government
regulations require fuel ethanol dispensing
pumps to be identified by a small, square,
orange and black label with the common
abbreviation or the appropriate percentage
for that region.
Aftermarket fuel additives GUID-663D952D-0F24-4D6E-ABBF-21302053695C
INFINITI does not recommend the use of
any aftermarket fuel additives (Example:
fuel injector cleaner, octane booster, intake
valve deposit removers, etc.) which are
sold commercially. Many of these additives
intended for gum, varnish or deposit
removal may contain active solvent or
similar ingredients that can be harmful to
the fuel system and engine.
Octane rating tips GUID-527A0AB1-299D-45DA-9B92-4DDA2444B93C
Using unleaded gasoline with an octane
rating lower than recommended above can
cause persistent, heavy spark knock.
(Spark knock is a metallic rapping noise.)
If severe, this can lead to engine damage.
If you detect a persistent heavy spark knock even when using gasoline of the
stated octane rating, or if you hear steady
spark knock while holding a steady speed
on level roads, have an INFINITI retailer
correct the condition. Failure to correct the
condition is misuse of the vehicle, for
which INFINITI is not responsible.
Incorrect ignition timing will result in
knocking, after-run or overheating. This in
turn may cause excessive fuel consumption
or damage to the engine. If any of the
above symptoms are encountered, have
your vehicle checked at an INFINITI retailer
or other competent service facility.
However, now and then you may notice
light spark knock for a short time while
accelerating or driving up hills. This is no
cause for concern, because you get the
greatest fuel benefit when there is light
spark knock for a short time under heavy
engine load.
CAUTION . Your vehicle is not designed to run on E-
85 fuel. Using E-85 fuel in a vehicle not
specifically designed for E-85 fuel can
damage fuel system components and is
not covered by the INFINITI new vehicle
Technical and consumer information
9-5