2018 INFINITI Q70 engine overheat

8-8Do-it-yourself
The engine cooling system is filled at the
factory with a pre-diluted mixture of 50%
Genuine NISSAN Long Life Antifreeze/
Coolant (blue) and 50% water to provide
year-round anti-freeze and coolant protec-
tion. The anti-freeze solution contains rust
and corrosion inhibitors. Additional engine
cooling system additives are not necessary.
WARNING
.Never remove the radiator cap when
the engine is hot. Wait until the
engine and radiator cool down. Ser-
ious burns could be caused by high
pressure fluid escaping from the
radiator. See precautions in “If your
vehicle overheats” (P.6-12).
. The radiator is equipped with a
pressure type radiator cap. To pre-
vent engine damage, use only a
genuine NISSAN radiator cap.
CAUTION
.Never use any cooling system addi-
tives such as radiator sealer. Addi-
tives may clog the cooling system and
cause damage to the engine, trans-
mission and/or cooling system. .
When adding or replacing coolant, be
sure to use only Genuine NISSAN
Long Life Antifreeze/Coolant (blue)
or equivalent. Genuine NISSAN Long
Life Antifreeze/Coolant (blue) is pre-
diluted to provide antifreeze protec-
tion to −34°F(−37°C). If additional
freeze protection is needed due to
weather where you operate your
vehicle, add Genuine NISSAN Long
Life Antifreeze/Coolant (blue) con-
centrate following the directions on
the container. If an equivalent cool-
ant other than Genuine NISSAN Long
Life Antifreeze/Coolant (blue) is
used, follow the coolant manufac-
ture’s instructions to maintain mini-
mum antifreeze protection to −34°F
(−37°C). The use of other types of
coolant solutions other than Genuine
NISSAN Long Life Antifreeze/Cool-
ant (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/Cool-
ant (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 “9. Maintenance and schedules”
section of this manual for more de-
tails.
ENGINE COOLING SYSTEM

8-10Do-it-yourself
until it reaches normal operating tempera-
ture. Add coolant up to the MAX level.
Tighten the cap securely after adding engine
coolant.
If the cooling system requires coolant fre-
quently, have it checked. It is recommended
you visit an INFINITI retailer for this
service.
CHANGING ENGINE COOLANT
It is recommended that major cooling system
repairs 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 reach of children
and pets.
Engine coolant must be disposed of prop-
erly. Check your local regulations.
SDI2541
VK56VD engine
SDI2045
VQ37VHR engine
ENGINE OIL

problems and/or fuel system damage.
.The fuel should be unleaded and have an
octane rating no lower than that re-
commended for unleaded gasoline.
. If an oxygenate-blend, excepting a
methanol blend, is used, it should con-
tain no more than 15% oxygenate.
. 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 ap-
propriate cosolvents and corrosion in-
hibitors. If not properly formulated with
appropriate cosolvents and corrosion
inhibitors, such methanol blends may
cause fuel system damage and/or vehi-
cle 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-oxyge-
nate 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-15 fuel
E-15 fuel is a mixture of approximately 15%
fuel ethanol and 85% unleaded gasoline. E-
15 can only be used in vehicles designed to
run on E-15 fuel. U.S. government regula-
tions require fuel ethanol dispensing pumps
to be identified with small, square, orange
and black label with the common abbrevia-
tion or the appropriate percentage for that
region.
E-85 fuel
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 appro-
priate percentage for that region.
Fuel containing MMT
MMT, or methylcyclopentadienyl manga-
nese tricarbonyl, is an octane boosting
additive. INFINITI does not recommend the
use of fuel containing MMT. Such fuel may
adversely affect vehicle performance, in-
cluding the emissions control system. Note
that while some fuel pumps label MMT
content, not all do, so you may have to consult your gasoline retailer for more de-
tails.
Aftermarket fuel additives
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 com-
mercially. 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
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,
it is recommended you have an INFINITI
retailer correct the condition. Failure to
correct the condition is misuse of the
vehicle, for which INFINITI is not respon-
sible.
Incorrect ignition timing will result in knock-
ing, after-run or overheating. This in turn
may cause excessive fuel consumption or
Technical and consumer information10-5

10-8Technical and consumer information
that can be harmful to the fuel system and
engine.
Octane rating tips
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,
it is recommended you have an INFINITI
retailer correct the condition. Failure to
correct the condition is misuse of the
vehicle, for which INFINITI is not respon-
sible.
Incorrect ignition timing will result in knock-
ing, 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 ve-
hicle checked. It is recommended you visit an
INFINITI retailer for this service 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 heavyengine load.

11-2
Climate controlAutomatic climate control .......................... 4-32
Clock ........................................................................\
2-45
Coat hooks ............................................................ 2-50
Cockpit ...................................................................... 2-3
Cold weather driving ........................................ 5-126
Compact spare tire ............................................ 8-40
Console box ........................................................... 2-49
Coolant Capacities and
recommended fluids/lubricants ................. 10-2
Changing engine coolant ............................ 8-10
Checking engine coolant level ...................... 8-9
Corrosion protection ............................................. 7-7
Cruise control ....................................................... 5-65 Fixed speed cruise control (on
ICC system) ..................................................... 5-85
Intelligent Cruise Control (ICC) ................. 5-67
Cruise indicator .................................................... 2-24
Cup holders ........................................................... 2-47
Current fuel consumption ................................. 2-27
D
Daytime running light system .......................... 2-36
Defroster switch
Rear window and outside mirror
defroster switch ............................................. 2-34
Dimensions .......................................................... 10-13
Distance Control Assist (DCA) ........................ 5-88
Distance Control Assist (DCA) system
switch indicator .................................................... 2-24 Distance Control Assist (DCA) system
warning light ......................................................... 2-13
Distance to empty ............................................... 2-27
Drive belts .............................................................. 8-18
Drive positioner .................................................... 3-28
Driving
Cold weather driving .................................. 5-126
Driving with automatic transmission ....... 5-15
Precautions when starting and driving ..... 5-4
E
ECO drive indicator light .................................... 2-17
ECO mode ............................................................. 5-21
ECO pedal system ............................................... 5-21
Economy
Fuel .................................................................. 5-117
Elapsed time ......................................................... 2-27
Elapsed time and trip odometer ..................... 2-27
Emission control information label ............... 10-16
Emission control system maintenance ............ 9-8
Emission control system warranty .............. 10-23
Engine Before starting the engine .......................... 5-13
Break-in schedule ........................................ 5-116
Capacities and
recommended fluids/lubricants ................. 10-2
Changing engine coolant ............................ 8-10
Changing engine oil and filter .................... 8-11
Checking engine coolant level ...................... 8-9
Checking engine oil level ............................. 8-11
Coolant temperature gauge ......................... 2-8 Emergency engine shut off ......................... 5-12
Engine block heater .................................... 5-127
Engine compartment check locations ........ 8-3
Engine cooling system ................................... 8-8
Engine oil ........................................................ 8-10
Engine oil and oil
filter recommendation .................................. 10-9
Engine oil replacement indicator ............... 2-25
Engine oil viscosity ........................................ 10-9
Engine serial number ................................. 10-15
Engine specifications .................................. 10-11
Engine start operation indicator ............... 2-22
If your vehicle overheats ............................. 6-12
Starting the engine ....................................... 5-14
Engine coolant temperature gauge .................. 2-8
Entry/exit function
Automatic drive positioner ......................... 3-28
Event Data Recorders (EDR) ........................ 10-25
Exhaust gas (carbon monoxide) ........................ 5-4
Explanation of scheduled
maintenance items ................................................. 9-5
F
F.M.V.S.S./C.M.V.S.S. certification label .... 10-15
Filter Air cleaner housing filter ............................. 8-19
Changing engine oil and filter .................... 8-11
Flashers (See hazard warning
flasher switch) ......................................................... 6-2
Flat tire ...................................................................... 6-3
Flat towing ......................................................... 10-22

Standard maintenance .................................... 9-7
Under the hood and vehicle ......................... 9-4
Malfunction indicator light (MIL) .................... 2-18
Map lights .............................................................. 2-57
Master warning light .......................................... 2-15
Mechanical key (Intelligent Key system) .......... 3-3
Memory function ................................................. 3-30
Memory storage Automatic drive positioner ......................... 3-29
Meter
Trip computer ................................................. 2-27
Meters and gauges ................................................ 2-6 Instrument brightness control ................... 2-38
Mirror Inside mirror .................................................... 3-25
Outside mirrors .............................................. 3-26
Vanity mirror ................................................... 3-28
Monitor Around View
®Monitor ............................... 4-10
RearView monitor ........................................... 4-3
Moonroof ............................................................... 2-54
Moving Object Detection (MOD) ................... 4-27
N
New vehicle break-in ........................................ 5-116
O
Odometer .................................................................. 2-7
Off-road recovery ................................................. 5-8 Oil
Capacities and
recommended fluids/lubricants ................. 10-2
Changing engine oil and filter .................... 8-11
Checking engine oil level ............................. 8-11
Engine oil ........................................................ 8-10
Engine oil viscosity ........................................ 10-9
Oil filter replacement indicator .................. 2-25
Operation Indicators for operation ............................... 2-22
Outside mirrors .................................................... 3-26
Overheat, If your vehicle overheats ............... 6-12
Owner’s Manual/Service Manual
order information ............................................. 10-26
P
Panic alarm ............................................................ 3-15
Parking Parking brake operation .............................. 5-19
Parking on hills ............................................. 5-119
Parking brake break-in .................................... 5-121
Personal lights ...................................................... 2-57
Phone Car phone or CB radio ................................ 4-38
Power Power door lock ............................................... 3-4
Power outlet ................................................... 2-46
Power steering fluid ..................................... 8-14
Power steering system ............................. 5-120
Power windows ............................................. 2-51
Power moonroof ................................................. 2-54 Precautions
Braking precautions .................................... 5-121
Child restraints ............................................... 1-19
Cruise control ................................................. 5-65
Maintenance ..................................................... 8-2
Seat belt usage .............................................. 1-10
Supplemental restraint system .................. 1-38
When starting and driving ............................ 5-4
Pre-crash seat belts with
comfort function ................................................... 1-12
Predictive Forward Collision
Warning (PFCW) .............................................. 5-108
Push starting .......................................................... 6-11
Push-button ignition switch .................. 5-10, 5-11
R
Radio Car phone or CB radio ................................ 4-38
Rain-sensing auto wiper system ..................... 2-33
Rapid air pressure loss ......................................... 5-8
Readiness for inspection/maintenance
(I/M) test (US only) .......................................... 10-25
Rear door auto closure ......................................... 3-5
Rear door lock Child safety rear door lock ........................... 3-6
Rear pocket ........................................................... 2-50
Rear spot lights .................................................... 2-58
Rear sunshade ...................................................... 2-55
Rear window and outside mirror
defroster switch ................................................... 2-34
RearView monitor ................................................. 4-3
11-5