2018 INFINITI Q70 cooling

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

JVM0651X
CHECKING ENGINE COOLANT
LEVEL
Models with non-pressurized ra-
diator reservoir tank
Check the coolant levelin the reservoir
when the engine is cold. If the coolant level
is below MIN
, open the reservoir tank cap
and add coolant up to the MAXlevel. 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
. 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.
SDI2624
Models with pressurized radiator
reservoir tank
Check the coolant level in the reservoir tank
when the engine is running and after it
reaches normal operating temperature. If
the coolant level is below MIN level
, add
coolant up to the MAX level. 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
cap above the radiator upper hose opening
and also add it to the reservoir tank up to the
MAX level
. Put on the filler cap above the
radiator upper hose and with the reservoir
cap open, start the engine. Run the engine
Do-it-yourself8-9

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

The following descriptions are provided to
give you a better understanding of the
scheduled maintenance items that should
be regularly checked or replaced. The main-
tenance schedule indicates at which mile-
age/time intervals each item requires
service.
In addition to scheduled maintenance, your
vehicle requires that some items be checked
during normal day-to-day operation. Refer
to “General maintenance” (P.9-2).
Items marked with “*” are recommended by
INFINITI for reliable vehicle operation. You
are not required to perform maintenance on
these items in order to maintain the warran-
ties which come with your vehicle. Other
maintenance items and intervals are re-
quired.
When applicable, additional information can
be found in the “8. Do-it yourself” section of
this manual.
NOTE:
INFINITI does not advocate the use of non-
OEM approved aftermarket flushing sys-
tems and strongly advises against perform-
ing these services on an INFINITI product.
Many of the aftermarket flushing systems
use non-OEM approved chemicals or sol-
vents, the use of which has not been
validated by INFINITI.For recommended fuel, lubricants, fluids,
grease, and refrigerant, refer to “Capacities
and recommended fluids/lubricants” (P.10-
2) of this manual.
EMISSION CONTROL SYSTEM
MAINTENANCE
Drive belts*:
Check engine drive belts for wear, fraying or
cracking and for proper tension. Replace any
damaged drive belts.
Engine air filter:
Replace at specified intervals. When driving
for prolonged periods in dusty conditions,
check/replace the filter more frequently.
Engine coolant*:
Replace coolant at the specified interval.
When adding or replacing coolant, be sure to
use only Genuine NISSAN Long Life Anti-
freeze/Coolant (blue) or equivalent with the
proper mixture. (Refer to “Engine cooling
system” (P.8-8) to determine the proper
mixture for your area.)
NOTE:
Mixing any other type of coolant or the use
of non-distilled water may reduce the
recommended service interval of the cool-
ant.
Engine oil and oil filter:
Replace engine oil and oil filter at the
specified intervals. For recommended oil
grade and viscosity refer to “Capacities and
recommended fluids/lubricants” (P.10-2).
Engine valve clearance*:
Inspect only if valve noise increases. Adjust
valve clearance if necessary.
Evaporative emissions control vapor lines*:
Check vapor lines for leaks or looseness.
Tighten connections or replace parts as
necessary.
Fuel lines*:
Check the fuel hoses, piping and connections
for leaks, looseness, or deterioration. Tight-
en connections or replace parts as necessary.
Spark plugs:
Replace at specified intervals. Install new
plugs of the type as originally equipped.
CHASSIS AND BODY MAINTE-
NANCE
Brake lines and cables:
Visually inspect for proper installation.
Check for chafing, cracks, deterioration,
and signs of leaking. Replace any deterio-
rated or damaged parts immediately.
Maintenance and schedules9-5
EXPLANATION OF SCHEDULED
MAINTENANCE ITEMS

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