2021 NISSAN MAXIMA engine overheat

CHECKING ENGINE COOLANT
LEVEL
Check the coolant levelin the reservoir
when the engine is cold. If the coolant
level is below the MIN level
OB, add coolant
to the MAX level
OA. If the reservoir is empty,
check the coolant level in the radiator
when the engine is cold. If there is insuffi-
cient coolant in the radiator, fill the radiator
with coolant up to the filler opening and
also add it to the reservoir up to the MAX
level
OA. This vehicle contains Genuine NISSAN Long
Life Antifreeze/Coolant (blue). The life ex-
pectancy of the factory-fill coolant is
105,000 miles (168,000 km) or 7 years. Mixing
any other type of coolant or the use of
non-distilled water will reduce the life ex-
pectancy of the factory-fill coolant. For ad-
ditional information, see the “Maintenance
and schedules” section of this manual.
If the cooling system frequently requires
coolant, it is recommended that you visit
a NISSAN dealer for this service.
For additional information on the location
of the engine coolant reservoir, see “Engine
compartment check locations” (P. 8-3).
CHANGING ENGINE COOLANT
A NISSAN dealer can change the engine
coolant. The service procedure can be
found in the NISSAN Service Manual.
Improper servicing can result in reduced
heater performance and engine
overheating.
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 es-
caping 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 chil-
dren and pets.
Engine coolant must be disposed of prop-
erly. Check your local regulations.
LDI2750
Do-it-yourself8-5

Fuel containing MMT
MMT, or methylcyclopentadienyl manga-
nese tricarbonyl, is an octane boosting ad-
ditive. NISSAN 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
details.
Af termarket fuel additives
NISSAN does not recommend the use of
any af termarket fuel additives (for ex-
ample, 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 sol-
vents 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 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 recom-
mended that you have a NISSAN dealer
correct the condition. Failure to correct
the condition is misuse of the vehicle, for
which NISSAN is not responsible.
Incorrect ignition timing may result in
spark knock, af ter-run and/or overheating,
which may cause excessive fuel consump-
tion or engine damage. If any of the above
symptoms are encountered, have your ve-
hicle checked. It is recommended that you
visit a NISSAN dealer for servicing.However, now and then you may notice
light spark knock for a short time while
accelerating or driving up hills. This is not
a cause for concern, because you get the
greatest fuel benefit when there is light
spark knock for a short time under heavy
engine load.
Technical and consumer information10-5

N
NISSAN Intelligent Key®..........3-2,3-7NISSAN Intelligent Key® battery discharge
indicator.....................5-13NISSAN Vehicle Immobilizer
System..................2-41, 5-14NissanConnect® Owner's Manual......4-2
O
Octane rating (See fuel octane rating). .10-5Odometer................... .2-5Oil
Capacities and recommended
fuel/lubricants
...............10-2Changing engine oil............8-6Changing engine oil filter.........8-6Checking engine oil level.........8-6Engine oil.................. .8-6Engine oil and oil filter
recommendation..........10-2, 10-6Engine oil viscosity.............10-6Outside mirror control............3-28Outside mirrors................3-28Overhead sunglasses holder........2-63Overheat
If your vehicle overheats.........6-11Owner's manual order form........10-22Owner's manual/service manual order
information................. .10-22
P
Parking
Parking brake operation.........5-21Parking/parking on hills.........5-111Parking brake..................5-21Personal lights.................2-73PowerPower door locks..............3-6Power outlet................2-59Powerrearwindows...........2-66Power steering fluid............8-11Power steering system.........5-112Power windows..............2-65Rear power windows...........2-66Power outlet................. .2-59Power steering................5-112Power steering fluid..............8-11Precautions
Maintenance precautions.........8-2Precautions on booster
seats...............1-29, 1-35, 1-40Precautions on child
restraints............1-29,1-35, 1-40Precautions on seat belt usage.....1-11Precautions on supplemental restraint
system................... .1-43Precautions when starting and driving.5-4Push starting..................6-11
R
Radio
Car phone or CB radio..........4-33Rain-sensing auto wiper system.....2-44Readiness for inspection maintenance (I/M)
test...................... .10-21Rear Automatic Braking (RAB).......5-80Rear Cross Traffic Alert (RCTA).......5-45Rear Door Alert.........2-26,2-27,2-58Rear power sunshade............2-70Rear power windows.............2-66Rear seat.................... .1-5Rear sun shade................2-70Rear window and outside mirror defroster
switch..................... .2-45RearView Monitor................4-3Recommended Fluids............10-2Recorders
Event Data................ .10-22Refrigerant recommendation. . . .10-2, 10-7Registering a vehicle in another
country.................... .10-10Remote Engine Start..........3-18,5-15Reporting safety defects (US only). . . .10-20
S
Safety
Child safety rear door lock.........3-6Child seat belts.....1-22,1-29, 1-35, 1-40Reporting safety defects (US only). .10-20
11-5