2018 INFINITI Q70 HYBRID cooling

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 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 escap-
ing from the radiator. See precau-
tions 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 nondistilled 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.
Do-it-yourself8-5
ENGINE COOLING SYSTEM

8-6Do-it-yourself
SDI2043
CHECKING ENGINE COOLANT
LEVEL
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.
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.

The inverter 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 antifreeze solution contains rust
and corrosion inhibitors. Additional inverter
cooling system additives are not necessary.
WARNING
.Never remove the coolant reservoir
cap when the engine and inverter are
hot. Wait until the engine and in-
verter cool down. Serious burns could
be caused by high pressure fluid
escaping from the radiator.
. The inverter reservoir is equipped
with a pressure type cap. To prevent
engine and inverter damage, use only
a genuine NISSAN inverter reservoir
cap.
CAUTION
.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 manufatur-
urer’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 inverter cooling system.
. The life expectancy of the factory-fill
coolant is 125,000 miles (200,000
km) or 15 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. .
Never use any additives in the cool-
ant such as radiator sealer in the
cooling system. This may cause da-
mage to electrical equipment such as
the motor and inverter, and also to
engine and transmission.
Do-it-yourself8-7
INVERTER COOLING SYSTEM

8-8Do-it-yourself
JVM0038X
CHECKING INVERTER COOLANT
LEVEL
Check the coolant level in the reservoir when
the engine and inverter are cold. If the
coolant level is below the MIN level
, add
coolant to the MAX level.
If the inverter cooling system frequently
requires coolant, have it checked. It is
recommended you visit an INFINITI retailer
for this service.
CHANGING INVERTER COOLANT
An INFINITI ratailer can change the inverter
coolant. The service procedure can be found
in the INFINITI Service Manual.
Improper servicing can result in inverter
overheating.
WARNING
. To avoid the danger of being scalded,
never change the coolant when the
inverter is hot.
. Never remove the cap when the
inverter is hot. Serious burns could
be caused by high pressure fluid
escaping from the inverter coolant
reservoir.
. 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.
Inverter coolant must be disposed of prop-
erly. Check your local regulations.
SDI2045
VQ35HR engine
CHECKING ENGINE OIL LEVEL
1. Park the vehicle on a level surface and apply the parking brake.
2. Run the engine until it reaches operating 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
.
If the oil level is below, remove the oil
filler cap and pour recommended oil
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
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.8-5) 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.
Hybrid Electronic Vehicle (HEV) inverter
coolant:
Replace inverter coolant at the specified
interval. When adding or replacing coolant,
be sure to use only Genuine NISSAN Long
Life Antifreeze/Coolant (blue) or equivalent
with the proper mixture. (Refer to “Inverter
cooling system” (P.8-7) 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 and connections 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.
Maintenance and schedules9-5
EXPLANATION OF SCHEDULED
MAINTENANCE ITEMS

EngineBefore starting the INFINITI Direct
Response Hybrid
®System .......................... 5-13
Break-in schedule ........................................ 5-116
Capacities and
recommended fluids/lubricants ................. 10-2
Changing engine coolant ............................... 8-6
Changing engine oil and filter ...................... 8-9
Checking engine coolant level ...................... 8-6
Checking engine oil level ............................... 8-8
Emergency engine shut off ......................... 5-12
Engine block heater .................................... 5-126
Engine compartment check locations ........ 8-3
Engine cooling system ................................... 8-5
Engine oil ........................................................... 8-8
Engine oil and oil
filter recommendation .................................. 10-5
Engine oil replacement indicator ............... 2-27
Engine oil viscosity ........................................ 10-6
Engine serial number .................................... 10-9
Engine specifications .................................... 10-7
If your vehicle overheats ............................. 6-12
Starting the INFINITI Direct Response
Hybrid
®System .............................................. 5-13
Engine coolant temperature gauge ................ 2-31
Entry/exit function
Automatic drive positioner ......................... 3-28
EV mode odometer and twin
trip odometer ........................................................ 2-30
Event Data Recorders (EDR) ......................... 10-19
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 ...... 10-9
Fail-safe ................................................................. 5-16
Filter
Air cleaner housing filter ............................. 8-16
Changing engine oil and filter ...................... 8-9
Flashers (See hazard warning
flasher switch) ......................................................... 6-2
Flat tire ...................................................................... 6-3
Flat towing .......................................................... 10-16
Floor mat .................................................................. 7-6
Fluid Automatic Transmission Fluid (ATF) ....... 8-11
Brake fluid ....................................................... 8-12
Capacities and
recommended fluids/lubricants ................. 10-2
Engine coolant .................................................. 8-5
Engine oil ........................................................... 8-8
Power steering fluid ..................................... 8-11
Window washer fluid ................................... 8-12
Fog light switch ................................................... 2-43
Forward Emergency Braking (FEB) ............. 5-101
Forward Emergency Braking (FEB) system
warning light ......................................................... 2-14
Front passenger air bag and status light ..... 1-45
Front power seat adjustment ............................. 1-3
Front seat
Front seat adjustment .................................... 1-3 Front-seat active head restraints ...................... 1-8
Fuel
Capacities and
recommended fluids/lubricants ................. 10-2
Fuel economy ............................................... 5-117
Fuel information ............................................ 10-3
Fuel octane rating ......................................... 10-3
Fuel-filler cap .................................................. 3-21
Fuel-filler door ............................................... 3-21
Gauge .................................................................. 2-8
Fuel economy history .................. Hybrid System-7
Fuel efficient driving tips ................................. 5-116
Fuses ....................................................................... 8-19
Fusible links ........................................................... 8-19
G
Garage door opener HomeLink®Universal Transceiver ............ 2-62
Gas cap ................................................................... 3-21
Gauge ........................................................................\
. 2-6 Assist charge gauge ........................................ 2-8
Fuel gauge ......................................................... 2-8
Odometer ............................................................ 2-7
Speedometer ...................................................... 2-7
Tachometer ....................................................... 2-8
Trip computer ................................................. 2-28
General maintenance ................................... 9-2, 9-2
Glove box ............................................................... 2-51
11-3

11-4
H
Hazard warning flasher switch ........................... 6-2
Head restraints/headrests .................................. 1-5
HeadlightsAiming control (See Adaptive Front
lighting System (AFS)) ................................ 2-40
Bulb replacement .......................................... 8-24
Headlight switch ............................................ 2-38
Heated seats ......................................................... 2-44
Heated steering wheel ....................................... 2-43
Heater Engine block heater .................................... 5-126
Heater and air conditioner .......................... 4-32
High temperature warning light ...................... 2-14
High voltage cautions ................. Hybrid System-2
High voltage components .......... Hybrid System-9
Hill start assist system ..................................... 5-124
HomeLink
®Universal Transceiver .................. 2-62
Hood release ......................................................... 3-17
Hook Coat hooks ...................................................... 2-53
Horn ........................................................................\
. 2-44
Hybrid EPS (Electrical Power Steering)
warning light ......................................................... 2-14
Hybrid system over heat warning .................. 2-24
Hybrid system start operation indicator ....... 2-23
Hybrid
vehicle characteristics .............. Hybrid System-10
Hybrid vehicle precautions ......... Hybrid System-9
I
If the vehicle does not start ................................ 6-9
Ignition switch (Push-button) ................................................... 5-9
Automatic transmission models ................ 5-14
Immobilizer system .............................................. 2-34
In-cabin microfilter .............................................. 4-37
Indicator Lights ................................................................ 2-18
Vehicle information display ........................ 2-21
Indicator lights ...................................................... 2-18
INFINITI Direct Response
Hybrid
®System ............................. Hybrid System-2
INFINITI Drive Mode Selector ......................... 5-19
Infiniti InTouch Owner’s Manual ...................... 4-2
INFINITI Vehicle Immobilizer System ............ 2-34
Engine start ..................................................... 2-34
Inside mirror .......................................................... 3-25
Inspection/maintenance (I/M) test .............. 10-19
Instrument brightness control ......................... 2-42
Instrument panel ..................................................... 2-5
Intelligent Cruise Control (ICC) ....................... 5-66
Intelligent Cruise Control (ICC) system MAIN
switch indicator .................................................... 2-26
Intelligent Cruise Control (ICC) system
warning light ......................................................... 2-15
Intelligent Key .......................................................... 3-2
Intelligent Key battery discharge .................... 5-12
Intelligent Key ignition indicator ..................... 2-24 Intelligent Key system ........................................... 3-7
Battery replacement ..................................... 8-21
Key operating range ....................................... 3-8
Key operation ................................................. 3-10
Warning signals .............................................. 3-12
Interior light control switch .............................. 2-61
Interior light replacement .................................. 8-24
Interior lights ......................................................... 2-60
Interior trunk lid release .................................... 3-21
Inverter cooling system ......................................... 8-7
ISOFIX child restraint .......................................... 1-21J
Jump starting ........................................................ 6-10
K
Keyless entry (See remote keyless
entry system) ........................................................ 3-14
Keys ........................................................................\
.... 3-2 For Intelligent Key system ............................. 3-7
L
LabelsAir bag warning labels ................................. 1-50
Air conditioner specification label ......... 10-10
Emission control information label ........ 10-10
Engine serial number .................................... 10-9
F.M.V.S.S./C.M.V.S.S.
certification label ........................................... 10-9